TREADCO INC
SC 13E3/A, 1999-04-20
AUTOMOTIVE REPAIR, SERVICES & PARKING
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<PAGE>   1
===============================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                               ------------------

                                SCHEDULE 13E-3/A
                                (AMENDMENT NO. 1)
                        RULE 13e-3 TRANSACTION STATEMENT
       (PURSUANT TO SECTION 13(e) OF THE SECURITIES EXCHANGE ACT OF 1934)

                                  TREADCO, INC.
                              (NAME OF THE ISSUER)

                               ------------------

                            ARKANSAS BEST CORPORATION
                         TREADCO ACQUISITION CORPORATION
                      (NAME OF PERSON(S) FILING STATEMENT)

                               ------------------

                     COMMON STOCK, PAR VALUE $.01 PER SHARE
             (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                         (TITLE OF CLASS OF SECURITIES)

                               ------------------

                                   894545 10 2
                      (CUSIP NUMBER OF CLASS OF SECURITIES)

                                RICHARD F. COOPER
                       VICE PRESIDENT AND GENERAL COUNSEL
                            ARKANSAS BEST CORPORATION
                             3801 OLD GREENWOOD ROAD
                           FORT SMITH, ARKANSAS 72903
                                 (501) 785-6000
   (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO RECEIVE NOTICES
           AND COMMUNICATIONS ON BEHALF OF PERSON(S) FILING STATEMENT)

                                   COPIES TO:

                             ALAN J. BOGDANOW, ESQ.
                              HUGHES & LUCE, L.L.P.
                          1717 MAIN STREET, SUITE 2800
                               DALLAS, TEXAS 75201
                                 (214) 939-5500

===============================================================================


                                      -1-
<PAGE>   2

                                  INTRODUCTION


         Arkansas Best Corporation, a Delaware corporation ("Parent"), hereby
amends and supplements its Rule 13E-3 Transaction Statement (the "Statement")
originally filed with the Securities and Exchange Commission (the "Commission")
on March 23, 1999, as amended, with respect to a tender offer by Parent to
purchase all of the outstanding shares of the common stock, par value $.01 per
share (the "Common Stock"), including the associated common stock purchase
rights (the "Rights" and, together with the Common Stock, the "Shares") of
Treadco, Inc., a Delaware corporation (the "Company"), at a price of $9.00 per
share net to the seller in cash upon the terms and subject to the conditions set
forth in Parent's Offer to Purchase, dated March 23, 1999 (the "Offer to
Purchase"), and the related Letter of Transmittal, copies of which are attached
as Exhibits (d)(1) and (d)(2) hereto, respectively, and as Exhibits (a)(1) and
(a)(2), respectively, to Parent's Tender Offer Statement on Schedule 14D-1
originally filed with the Commission on March 23, 1999 (as amended, the
"Schedule 14D-1"). Capitalized terms used herein but not defined are used as
defined in the Offer to Purchase and the Schedule 14D-1.

         The cross reference sheet below is being supplied pursuant to General
Instruction F to Schedule 13E-3 and shows the location in the Schedule 14D-1 of
the information required to be included in response to the items of this
Statement. The information in the Schedule 14D-1, including all exhibits
thereto, is hereby expressly incorporated herein by reference and the responses
to each item to this Statement are qualified in their entirety by the provisions
of the Schedule 14D-1. All cross references in this Statement, other than cross
references to the Schedule 14D-1, are to the Offer to Purchase.


                                      -2-
<PAGE>   3

                              CROSS REFERENCE SHEET
                                       TO
                                 SCHEDULE 14D-1

<TABLE>
<CAPTION>
                                                                                                      ITEM OF
                              ITEM AND CAPTION OF SCHEDULE 14D-1                                   SCHEDULE 14D-1
                              ----------------------------------                                   --------------
<S>    <C>                                                                                         <C>
1.     Issuer and Class of Security Subject to the Transaction
       (a)...............................................................................               1(a)
       (b)...............................................................................               1(b)
       (c)...............................................................................               1(c)
       (d)-(f)...........................................................................               *

2.     Identity and Background
       (a)...............................................................................               2(a)
       (b)...............................................................................               2(b)
       (c)...............................................................................               2(c)
       (d)...............................................................................               2(d)
       (e)...............................................................................               2(e)
       (f)...............................................................................               2(f)
       (g)...............................................................................               2(g)

3.     Past Contacts, Transactions or Negotiations
       (a)...............................................................................               3(a)
       (b)...............................................................................               3(b)

4.     Terms of the Transaction
       (a)...............................................................................               10(f) 
       (b)...............................................................................               *

5.     Plans or Proposals of the Issuer or Affiliate
       (a)...............................................................................               5(a)
       (b)...............................................................................               5(b)
       (c)...............................................................................               5(c)
       (d)...............................................................................               5(d)
       (e)...............................................................................               5(e)
       (f)...............................................................................               5(g)
       (g)...............................................................................               *

6.     Source and Amounts of Funds or Other Consideration
       (a)...............................................................................               4(a)
       (b)...............................................................................               *
       (c)...............................................................................               4(b)
       (d)...............................................................................               4(c)


7.     Purpose(s), Alternatives, Reasons and Effects
       (a)...............................................................................               5(f)
       (b)-(c)...........................................................................               *
       (d)...............................................................................               10(f)

8.     Fairness of the Transaction
       (a)-(f)...........................................................................               *

9.     Reports, Opinions, Appraisals and Certain Negotiations
       (a)...............................................................................               10(f)
       (b)...............................................................................               10(f)
       (c)...............................................................................               *
</TABLE>


                                      -3-
<PAGE>   4

<TABLE>
<S>    <C>                                                                                         <C>
10.    Interest in Securities of the Issuer
       (a)...............................................................................               6(a)
       (b)...............................................................................               6(b)

11.    Contracts, Arrangements or Understandings With Respect to
       the Issuer's Securities...........................................................               7

12.    Present Intention and Recommendation of Certain Persons
       With Regard to the Transaction
       (a)-(b)...........................................................................               *

13.    Other Provisions of the Transaction
       (a)-(c)...........................................................................               *

14.    Financial Information
       (a)-(b)...........................................................................               *

15.    Persons and Assets Employed, Retained or Utilized
       (a)...............................................................................               *
       (b)...............................................................................               8

16.    Additional Information............................................................               10

17.    Material to be Filed as Exhibits..................................................               11
</TABLE>

- ----------------

*   The item is not required by Schedule 14D-1, is inapplicable or is answered
    in the negative.


                                      -4-
<PAGE>   5

ITEM 4.  TERMS OF THE TRANSACTION.

         (a)      Item 4(a) is hereby amended by the following:

                  The information incorporated by reference from the first
                  paragraph of "THE TENDER OFFER --Certain Conditions of the
                  Offer" of the Offer to Purchase, filed as Exhibit (d)(1), is
                  amended by deleting such information and substituting
                  therefore:

                                    Notwithstanding any other provisions of the
                           Offer, Parent shall not be required to accept for
                           payment or pay for and may delay the acceptance for
                           payment of, or the payment for, any Shares, and may
                           terminate the Offer and not accept for payment or pay
                           for any Shares, if (i) immediately prior to the
                           expiration of the Offer (as it may be extended in
                           accordance with the Offer), the Minimum Condition
                           shall not have been satisfied, (ii) any applicable
                           waiting period under the HSR Act shall not have
                           expired or been terminated prior to the expiration of
                           the Offer; (iii) any required consent, permit or
                           authorization from any regulatory or governmental
                           authority has not been obtained prior to the
                           Expiration Date; or (iv) at any time prior to the
                           Expiration Date, Parent makes a determination (which
                           shall be made in good faith) that any of the
                           following conditions exist:

ITEM 7.  PURPOSE(S), ALTERNATIVES, REASONS AND EFFECTS.

         (a)      Item 7(a) is hereby amended by the following:

                  The information incorporated by reference from the third
                  paragraph under "SPECIAL FACTORS --Purpose and Structure of
                  the Transaction" of the Offer to Purchase, filed as Exhibit
                  (d)(1), is amended by deleting such information and
                  substituting therefore:

                           The present requirements to maintain the listing of
                           the Shares on the Nasdaq National Market and
                           registration of the Shares under the Exchange Act,
                           coupled with the Company's status as a public
                           company, impose on the Company direct and indirect
                           compliance costs. Compliance with such ongoing
                           requirements imposes an administrative burden on the
                           Company, resulting in the diversion of management
                           time and resources.

                           The Parent's management estimates that the following
                           compliance, public company-related, and other costs
                           would be eliminated after consummation of the
                           Transaction:

<TABLE>
                           <S>                                                        <C>
                           Directors insurance and fees                               $200,000
                           Annual public reporting expenses                           $167,500
                           Higher interest rate cost                                  $ 60,000
                                                                                      --------
                           Total pre-tax savings of the above items                   $427,500
                                                                                      --------
                           After-tax savings                                          $261,203
                           State tax savings                                          $ 35,741
                                                                                      --------
                           Total after-tax savings including state tax savings        $296,943
                                                                                      ========
                           After-tax savings from goodwill reductions                 $462,000
                                                                                      ========
                           Total savings                                              $758,943
                                                                                      ========
</TABLE>


                                      -5-
<PAGE>   6

         (d)      Item 7(d) is hereby amended by the following:

                  The disclaimer that reads: "NONE OF THE COMPANY OR PARENT OR
                  THEIR RESPECTIVE ADVISORS ASSUMES ANY RESPONSIBILITY FOR THE
                  ACCURACY OF THE PROJECTIONS," which is incorporated by
                  reference from the fourth sentence of the second paragraph of
                  "SPECIAL FACTORS -- Certain Projections" of the Offer to
                  Purchase, filed as Exhibit (d)(1), is amended by deleting such
                  information.

ITEM 9.  REPORTS, OPINIONS, APPRAISALS AND CERTAIN NEGOTIATIONS.

         (a)      Item 9(a) is hereby amended and supplemented by deleting the
                  sixth and seventh paragraphs of "SPECIAL FACTORS -- Background
                  of the Offer and the Merger" of the Offer to Purchase, filed
                  as Exhibit (d)(1), and substituting therefore:

                                      In November 1998, Morgan Stanley began
                           reviewing with Parent its options with respect to the
                           Company. Representatives of Morgan Stanley made a
                           presentation regarding these alternatives to Parent's
                           Board of Directors at its regular meeting on December
                           10, 1998. Morgan Stanley, among other things,
                           presented an historical overview of the Company,
                           discussed its financial condition and results of
                           operations, reviewed the stock's liquidity,
                           identified the Company's research coverage, and
                           discussed the Company's possible strategic value to
                           Parent. Morgan Stanley reviewed the following
                           strategic alternatives with Parent's Board of
                           Directors: (i) Parent continuing to hold its 49%
                           interest in the Company, (ii) sale of 100% of the
                           Company, and (iii) a Parent repurchase of the
                           remaining Company interest held by the public with a
                           potential strategic sale in the future. Morgan
                           Stanley also reviewed certain considerations such as
                           tax considerations, the Bandag settlement, the
                           revenue and earnings of the business, other potential
                           strategic buyers, estimated strategic value, cost
                           savings associated with having the Company as a
                           wholly-owned subsidiary of Parent, and the long-term
                           strategic fit with Parent. In addition, Morgan
                           Stanley reviewed the process, timelines and potential
                           after-tax proceeds associated with either a
                           repurchase of shares or an immediate sale of the
                           Company. Morgan Stanley also discussed other
                           potential economic benefits to Parent associated with
                           repurchasing the Company.

                                      Morgan Stanley was not requested to, and
                           did not, render a financial opinion regarding the
                           fairness of the consideration in the Offer and the
                           Merger. In addition, Morgan Stanley was not requested
                           to, and did not, solicit third party indications of
                           interest with respect to Parent's interest in the
                           Company. See "THE TENDER OFFER - Fees and Expenses"
                           for a description of Parent's fee arrangements with
                           Morgan Stanley in connection with the Offer and the
                           Merger.

                  Item 9(a) is also hereby amended and supplemented by reference
                  to the Morgan Stanley Dean Witter presentation to Parent's
                  Board of Directors on December 10, 1998, which is attached as
                  Exhibit (b)(2) hereto; by reference to the Stephens
                  presentation to the Special Committee on March 15, 1999, which
                  is attached as Exhibit (b)(3) hereto; and by reference to
                  Parent's letter to the Special Committee which was delivered
                  to Stephens on March 15, 1999 which is attached as Exhibit
                  (b)(4) hereto.

         (b)      Item 9(b) is hereby amended by the following:

                  The disclosure that reads: "Because such analyses are
                  inherently subject to uncertainty, none of the Company, Parent
                  or Stephens or any other person assumes responsibility if
                  future events do not conform to the judgments reflected in the
                  opinion of Stephens," which is incorporated by reference from
                  the last sentence of the second paragraph of "SPECIAL FACTORS
                  -- Opinion of Financial Advisor" of the Offer to Purchase,
                  filed as Exhibit (d)(1), is amended by deleting such
                  information and substituting therefore:

                           "Such analyses are inherently subject to uncertainty
                           and actual results could differ significantly from
                           current expectations due to a number of factors,
                           including general economic conditions; competitive
                           initiatives and pricing pressures; labor relations;
                           costs of raw material; availability and cost of
                           capital; shifts in market demand; weather conditions;
                           the performance and needs of industries served by the
                           Company's businesses; actual future costs of
                           operating expenses; self-insurance claims and
                           employee wages and benefits; actual costs of
                           continuing investments in technology; and the timing
                           and amount of capital expenditures."


                                      -6-
<PAGE>   7
ITEM 14.  FINANCIAL INFORMATION

(a)       On April 14, 1999, the Company issued a press release regarding the 
          1999 first quarter operating results, a copy of which is attached 
          hereto as Exhibit (d)(7) and incorporated herein by reference.

ITEM 17.  MATERIAL TO BE FILED AS EXHIBITS.

EXHIBIT         ITEM
NUMBER

(a)(1)    $250,000,000 Credit Agreement dated as of June 12, 1998 among Parent
          and Societe Generale, Southwest Agency, as Administrative Agent and
          Bank of America National Trust Savings Association and Wells Fargo
          Bank (Texas), N.A., as Co-Documentation Agents.
(b)(1)    Opinion of Stephens Inc. included as ANNEX A to the Offer to Purchase
          as Exhibit (d)(1) hereto.
(b)(2)    Morgan Stanley Dean Witter presentation to Parent's Board of
          Directors on December 10, 1998.
(b)(3)    Stephens Inc. presentation to the Special Committee on March 15, 1999.
(b)(4)    Parent's letter of March 15, 1999 to the Special Committee.
(c)(1)    Agreement and Plan of Merger dated as of March 15, 1999 among Parent,
          Newco and the Company included as ANNEX B to the Offer to Purchase as
          Exhibit (d)(1) hereto.
(c)(2)    Support Agreement dated as of January 22, 1999 between Parent and
          Shapiro Capital Management Company, Inc.
(d)(1)    Offer to Purchase.
(d)(2)    Letter of Transmittal.
(d)(3)    Notice of Guaranteed Delivery.
(d)(4)    Letter to Brokers, Dealers, Banks, Trust Companies and Other Nominees.
(d)(5)    Form of Letter to Clients for use by Brokers, Dealers, Banks, Trust
          Companies and Other Nominees.
(d)(6)    Guidelines for Certification of Taxpayer Identification Number on
          Form W-9.
(d)(7)    Press Release of the Company dated April 14, 1999.
(e)       Section 262 of the Delaware General Corporation Law included as ANNEX
          E to the Offer to Purchase as Exhibit (d)(1) hereto.


                                      -7-
<PAGE>   8

                                    SIGNATURE


         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.


DATED:  April 20, 1999

                                   ARKANSAS BEST CORPORATION


                                   By:    /s/ DAVID E. LOEFFLER
                                      -----------------------------------------
                                   Name:  David E. Loeffler
                                          -------------------------------------
                                   Title: Vice President and Chief Financial
                                          Officer
                                          -------------------------------------

                                   TREADCO ACQUISITION CORPORATION

                                   By:    /s/ DAVID E. LOEFFLER
                                      -----------------------------------------
                                   Name:  David E. Loeffler
                                          -------------------------------------
                                   Title: Vice President 
                                          -------------------------------------

                                    

                                      -8-
<PAGE>   9

                                  EXHIBIT INDEX


<TABLE>
<CAPTION>
EXHIBIT         ITEM
NUMBER          ----
- -------
<S>       <C>
(a)(1)   $250,000,000 Credit Agreement dated as of June 12, 1998 among Parent
         and Societe Generale, Southwest Agency, as Administrative Agent and
         Bank of America National Trust Savings Association and Wells Fargo
         Bank (Texas), N.A., as Co-Documentation Agents.
(b)(1)   Opinion of Stephens Inc. included as ANNEX A to the Offer to Purchase 
         as Exhibit (d)(1) hereto.
(b)(2)   Morgan Stanley Dean Witter presentation to Parent's Board of
         Directors on December 10, 1998.
(b)(3)   Stephens Inc. presentation to the Special Committee on March 15, 1999.
(b)(4)   Parent's letter of March 15, 1999 to the Special Committee.
(c)(1)   Agreement and Plan of Merger dated as of March 15, 1999 among Parent,
         Newco and the Company included as ANNEX B to the Offer to Purchase as 
         Exhibit (d)(1) hereto.
(c)(2)   Support Agreement dated as of January 22, 1999 between Parent and 
         Shapiro Capital Management Company, Inc.
(d)(1)   Offer to Purchase.
(d)(2)   Letter of Transmittal.
(d)(3)   Notice of Guaranteed Delivery.
(d)(4)   Letter to Brokers, Dealers, Banks, Trust Companies and Other Nominees.
(d)(5)   Form of Letter to Clients for use by Brokers, Dealers, Banks, Trust 
         Companies and Other Nominees.
(d)(6)   Guidelines for Certification of Taxpayer Identification Number on
         Form W-9. 
(d)(7)   Press Release of the Company dated April 14, 1999.
(e)      Section 262 of the Delaware General Corporation Law included as ANNEX
         E to the Offer to Purchase as Exhibit (d)(1) hereto.
</TABLE>


                                      -9-

<PAGE>   1
                                                                  Exhibit (a)(1)


================================================================================


                                  $250,000,000

                                CREDIT AGREEMENT


                           Dated as of June 12, 1998


                                     Among


                           ARKANSAS BEST CORPORATION

                                as the Borrower,


                       SOCIETE GENERALE, SOUTHWEST AGENCY

                            as Administrative Agent,


                       BANK OF AMERICA NATIONAL TRUST AND
                              SAVINGS ASSOCIATION

                                      and

                        WELLS FARGO BANK (TEXAS), N.A.,

                          as Co-Documentation Agents,


                                      and


                             THE BANKS NAMED HEREIN

                                  as the Banks


================================================================================
<PAGE>   2

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                            Page

<S>                   <C>                                                                                   <C>
ARTICLE I                                    DEFINITIONS AND ACCOUNTING TERMS
     Section 1.1      Certain Defined Terms   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
     Section 1.2      Computation of Time Periods   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
     Section 1.3      Accounting Terms; Changes in GAAP   . . . . . . . . . . . . . . . . . . . . . . . . .  20
     Section 1.4      Types of Advances   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
     Section 1.5      Miscellaneous   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20

ARTICLE II                                THE ADVANCES AND THE LETTERS OF CREDIT
     Section 2.1      The Advances.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
     Section 2.2      Method of Borrowing   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
     Section 2.3      Fees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
     Section 2.4      Reduction of the Revolving Commitments  . . . . . . . . . . . . . . . . . . . . . . .  25
     Section 2.5      Repayment of Advances   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
     Section 2.6      Interest  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
     Section 2.7      Prepayments   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
     Section 2.8      Breakage Costs  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
     Section 2.9      Increased Costs   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
     Section 2.10     Payments and Computations   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
     Section 2.11     Taxes   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
     Section 2.12     Illegality  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
     Section 2.13     Letters of Credit   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
     Section 2.14     Determination of Borrowing Base   . . . . . . . . . . . . . . . . . . . . . . . . . .  37
     Section 2.15     Bank Replacement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
     Section 2.16     Sharing of Payments, Etc.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
     Section 2.17     Collateral.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39

ARTICLE III                                       CONDITIONS OF LENDING
     Section 3.1      Conditions Precedent to Effectiveness of this Agreement   . . . . . . . . . . . . . .  41
     Section 3.2      Conditions Precedent for each Borrowing or Letter of Credit   . . . . . . . . . . . .  42

ARTICLE IV                                    REPRESENTATIONS AND WARRANTIES
     Section 4.1      Corporate Existence; Subsidiaries   . . . . . . . . . . . . . . . . . . . . . . . . .  43
     Section 4.2      Corporate Power   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
     Section 4.3      Authorization and Approvals   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
     Section 4.4      Enforceable Obligations   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
     Section 4.5      Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
     Section 4.6      True and Complete Disclosure  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
     Section 4.7      Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
     Section 4.8      Use of Proceeds   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
</TABLE>





                                     -ii-
<PAGE>   3

<TABLE>
<S>                   <C>                                                                                    <C>
     Section 4.9      Investment Company Act  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
     Section 4.10     Taxes   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
     Section 4.11     Pension Plans   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
     Section 4.12     Condition of Property; Casualties   . . . . . . . . . . . . . . . . . . . . . . . . .  46
     Section 4.13     Insurance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
     Section 4.14     No Burdensome Restrictions; No Defaults   . . . . . . . . . . . . . . . . . . . . . .  46
     Section 4.15     Environmental Condition   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
     Section 4.16     Permits, Licenses, etc.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
     Section 4.17     Existing Mortgage Debt  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
     Section 4.18     Year 2000   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48

ARTICLE V                                         AFFIRMATIVE COVENANTS
     Section 5.1      Compliance with Laws, Etc.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
     Section 5.2      Insurance.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
     Section 5.3      Preservation of Corporate Existence, Etc.   . . . . . . . . . . . . . . . . . . . . .  49
     Section 5.4      Payment of Taxes, Etc.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
     Section 5.5      Visitation Rights   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
     Section 5.6      Reporting Requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
     Section 5.7      Maintenance of Property   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
     Section 5.8      Ownership of ABF  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52

ARTICLE VI                                          NEGATIVE COVENANTS
     Section 6.1      Liens, Etc.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
     Section 6.2      Amendment of Material Documents   . . . . . . . . . . . . . . . . . . . . . . . . . .  54
     Section 6.3      Agreements Restricting Distributions From Subsidiaries  . . . . . . . . . . . . . . .  54
     Section 6.4      Merger or Consolidation; Asset Sales  . . . . . . . . . . . . . . . . . . . . . . . .  54
     Section 6.5      Restricted Payments   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
     Section 6.6      Investments, Loans, Advances  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
     Section 6.7      Affiliate Transactions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
     Section 6.8      Maintenance of Ownership of Subsidiaries  . . . . . . . . . . . . . . . . . . . . . .  56
     Section 6.9      No Further Negative Pledges   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
     Section 6.10     Other Businesses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
     Section 6.11     Debt Service Ratio  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
     Section 6.12     Net Worth   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
     Section 6.14     Capital Expenditures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
     Section 6.15     Indebtedness  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
     Section 6.16     Acquisition Expenditures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58

ARTICLE VII                                              REMEDIES
     Section 7.1      Events of Default   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
     Section 7.2      Optional Acceleration of Maturity   . . . . . . . . . . . . . . . . . . . . . . . . .  60
     Section 7.3      Automatic Acceleration of Maturity  . . . . . . . . . . . . . . . . . . . . . . . . .  61
     Section 7.4      Cash Collateral Account   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  61
</TABLE>





                                    -iii-
<PAGE>   4

<TABLE>
<S>                   <C>                                                                                    <C>
     Section 7.5      Non-exclusivity of Remedies   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
     Section 7.6      Right of Set-off  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62

ARTICLE VIII                                AGENCY AND ISSUING BANK PROVISIONS
     Section 8.1      Authorization and Action  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
     Section 8.2      Agent's Reliance, Etc.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
     Section 8.3      The Agent and Its Affiliates  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
     Section 8.4      Bank Credit Decision  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
     Section 8.5      Indemnification   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
     Section 8.6      Successor Agent and Issuing Banks   . . . . . . . . . . . . . . . . . . . . . . . . .  64
     Section 8.7      Co-Documentation Agents   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64

ARTICLE IX                                            MISCELLANEOUS
     Section 9.1      Amendments, Etc.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
     Section 9.2      Notices, Etc.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65
     Section 9.3      No Waiver; Remedies   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65
     Section 9.4      Costs and Expenses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66
     Section 9.5      Binding Effect  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66
     Section 9.6      Bank Assignments and Participations   . . . . . . . . . . . . . . . . . . . . . . . .  66
     Section 9.7      Indemnification   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
     Section 9.8      Execution in Counterparts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
     Section 9.9      Survival of Representations, etc  . . . . . . . . . . . . . . . . . . . . . . . . . .  69
     Section 9.10     Severability  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
     Section 9.11     Business Loans  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
     Section 9.12     Usury Not Intended  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
     Section 9.13     Governing Law   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
     Section 9.14     Consent to Jurisdiction   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
     Section 9.15     Banks Not in Control  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  71
     Section 9.16     Headings Descriptive  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  71
     Section 9.17     WAIVERS OF JURY TRIAL   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  71
     Section 9.18     ENTIRE AGREEMENT  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  71


EXHIBITS:

Exhibit A     -       Form of Note
Exhibit B     -       Form of Subsidiary Guaranty and Contribution Agreement
Exhibit C     -       Form of Borrower Security Agreement
Exhibit D     -       Form of Guarantors Security Agreement
Exhibit E     -       Form of Notice of Borrowing
Exhibit F     -       Form of Notice of Conversion or Continuation
Exhibit G     -       Form of Assignment and Acceptance
Exhibit H     -       Form of Borrower's/Guarantors' Counsel Opinion

</TABLE>




                                     -iv-
<PAGE>   5

<TABLE>
<S>          <C>      <C>
Exhibit I     -       Form of Agent's Counsel Opinion
Exhibit J     -       Form of Compliance Certificate
Exhibit K     -       Form of Borrowing Base Certificate
Exhibit L    -        Form of Swingline Note
</TABLE>





                                     -v-
<PAGE>   6

<TABLE>
<CAPTION>
SCHEDULES:
<S>                   <C>      <C>

Schedule 1.1(a)       -        Revolving Commitments
Schedule 1.1(b)       -        Letters of Credit Outstanding
Schedule 2.17         -        Locations of Certificates of Title
Schedule 4.1          -        Subsidiaries
Schedule 4.7          -        Litigation
Schedule 4.10         -        Tax Disclosure
Schedule 6.1          -        Existing Liens and Secured Indebtedness
Schedule 6.7          -        Certain Intercompany Arrangements
Schedule 6.15         -        Outstanding Indebtedness
Schedule 9.2          -        Notice Information for Banks
</TABLE>





                                     -vi-
<PAGE>   7

                                CREDIT AGREEMENT


     This Credit Agreement dated as of June 12, 1998 is among Arkansas Best
Corporation, a Delaware corporation, as the Borrower, Societe Generale,
Southwest Agency, as Administrative Agent, Bank of America National Trust and
Savings Association and Wells Fargo Bank (Texas), N.A., as Co-Documentation
Agents, and the Banks.

     The parties hereto do hereby agree as follows:


                                   ARTICLE I

                        DEFINITIONS AND ACCOUNTING TERMS

     Section I.1      Certain Defined Terms.  As used in this Agreement, the
following terms shall have the following meanings (unless otherwise indicated,
such meanings to be equally applicable to both the singular and plural forms of
the terms defined):

     "Acceptable Security Interest" means a valid, binding, and enforceable
Lien in any collateral (a) which exists in favor of the Agent for the benefit
of the Agent, the Co-Documentation Agents  and the Banks, (b) which upon
perfection will be superior to all other Liens, other than Liens permitted
under Section 6.1 of this Agreement, (c) which secures the Obligations, and (d)
which (i) is perfected, except to the extent nonperfection is expressly
permitted by the Credit Documents or (ii) will be perfected upon filing or
recording under applicable law all documents or instruments necessary to
perfect the same and all such documents and instruments have been duly executed
by the Borrower or a Guarantor, as the case may be, and delivered to the Agent
on or prior to the Effective Date.

     "Accession Agreement" means an Accession Agreement in the form attached to
the Guaranty as Annex 2 thereto,  which agreement causes the Person executing
and delivering the same to the Agent to become a party to the Guaranty and to
the Guarantors Security Agreement.

     "Acquisition Expenditures" means, for any period, the aggregate of all
expenditures and costs of the Borrower and its Subsidiaries paid in cash, debt
securities, Property other than common stock, or the assumption of Indebtedness
during such period for (a) the purchase or acquisition of assets of a business
of another Person other than the Borrower and any of its Subsidiaries, and (b)
the acquisition of stock, partnership, joint venture interests or other equity
interests in any Person other than the Borrower and any of its Subsidiaries.

     "Adjusted Consolidated" means Consolidated (as herein defined) less
accounts of Treadco.

     "Adjusted Prime Rate" means, for any day, the fluctuating rate per annum
of interest equal to the greater of (a) the Prime Rate in effect on such day
and (b) the Federal Funds Rate in effect on such day plus 1/2%.

     "Advance" means either a Revolving Advance or a Swingline Advance, any
such Revolving Advance being either a Prime Rate Advance or a Eurodollar Rate
Advance.





<PAGE>   8

     "Affiliate" means, as to any Person, any other Person that, directly or
indirectly, through one or more intermediaries, controls, is controlled by, or
is under common control with, such Person or any Subsidiary of such Person.
The term "control" (including the terms "controlled by" or "under common
control with") means the possession, directly or indirectly, of the power to
direct or cause the direction of the management and policies of a Person,
whether through ownership of a Control Percentage, by contract or otherwise.

     "Agent" means Societe Generale, Southwest Agency in its capacity as
Administrative Agent for the Banks pursuant to Article VIII and any successor
Administrative Agent pursuant to Section 8.6.

     "Agent's Fee Letter" means the letter agreement dated as of April 13, 1998
between the Borrower and the Agent.

     "Agreement" means this Credit Agreement dated as of June 12, 1998 among
the Borrower, the Agent, the Co-Documentation Agents and the Banks, as it may
be amended hereafter in accordance with its terms.

     "Applicable Lending Office" means, with respect to each Bank, such Bank's
Domestic Lending Office in the case of a Prime Rate Advance and such Bank's
Eurodollar Lending Office in the case of a Eurodollar Rate Advance.

     "Applicable Margin" means, at any time with respect to any Revolving
Advance, commitment fees or letter of credit fees hereunder (except as
otherwise provided below), the lesser of the applicable percentages set forth
in the following two tables.  Except as otherwise provided herein, the
"Applicable Margin" shall mean the following percentages determined as a
function of the Borrower's Leverage Ratio:

<TABLE>
<CAPTION>
                                  Eurodollar                                Letter of
    Tier           Leverage           Rate       Prime Rate    Commitment      Credit
    Level           Ratio           Advances      Advances        Fees          Fees
    -----           -----           --------      --------        ----          ----

     <S>       <C>                   <C>           <C>           <C>           <C>
      I             $3.25            1.250%        0.250%        0.375%        1.125%

     II        $2.75 and <3.25       1.125%        0.125%        0.375%        1.000%

    III        $2.25 and <2.75       0.875%        0.000%        0.250%        0.750%

     IV        $2.00 and <2.25       0.750%        0.000%        0.250%        0.625%

      V        $1.50 and <2.00       0.625%        0.000%        0.200%        0.500%

     VI        $1.25 and <1.50       0.500%        0.000%        0.200%        0.375%

    VII         less than 1.25       0.400%        0.000%        0.200%        0.275%
</TABLE>





                                      -2-
<PAGE>   9

     The foregoing ratio (a) shall be established at Tier Level III for the
period from the Effective Date through June 30, 1998, and (b) shall thereafter
be determined from the financial statements of the Borrower and its
Consolidated Subsidiaries most recently delivered pursuant to Section 5.6(a) or
Section 5.6(b) and certified to by an authorized financial officer of the
Borrower in accordance with such Sections.  Any change in the Applicable Margin
shall be effective upon the date of delivery of the financial statements
pursuant to Section 5.6(a) or Section 5.6(b), as the case may be, and receipt
by the Agent of the Compliance Certificate required by such Sections.  If the
Borrower fails to deliver any financial statements within the times specified
in Section 5.6(a) or 5.6(b), as the case may be, such ratio shall be (i)
established at Tier Level I from the date such financial statements should have
been delivered until the Borrower delivers such financial statements to the
Agent and the Banks, and (ii) when such financial statements are in fact
received by the Agent and the Banks, if it is determined that the actual ratio
was less than that established at Tier Level I, then the Applicable Margin for
the period from the date such financial statements should have been delivered
until the date the Agent and the Banks actually received such financial
statements shall be recalculated to reflect the actual ratio for such period of
time, and if interest or fees have been paid in the period prior to such
recalculation, appropriate adjustment shall be made to the next scheduled
payment of interest or fees to be made by the Borrower.

     Notwithstanding the foregoing but subject to the paragraph below, if at
any time, the Borrower's Senior Debt is rated BB+ or higher by S&P or Ba1 or
higher by Moody's, then "Applicable Margin" shall mean, at any time with
respect to any Revolving Advance, commitment fees or letter of credit fees
hereunder, the following percentages determined as a function of the ratings by
S&P or Moody's applicable on such date of the Borrower's Senior Debt as set
forth below:

<TABLE>
<CAPTION>
                     Senior                Eurodollar                                               Letter of
    Tier           Debt Rating                Rate              Prime Rate         Commitment        Credit
    Level          -----------              Advances             Advances             Fees            Fees
    -----                                   --------             --------             ----            ----

                 S&P       Moody's
                 ---       -------

     <S>      <C>          <C>               <C>                  <C>                <C>             <C>

      I        BBB+or       Baa1             0.300%               0.000%             0.1250%         0.175%
              higher         or
                           higher

     II          BBB        Baa2             0.350%               0.000%             0.1500%         0.225%

    III         BBB-        Baa3             0.400%               0.000%             0.1875%         0.275%

     IV          BB+         Ba1             0.625%               0.000%             0.2000%         0.500%
</TABLE>

If ratings fall within different Tier Levels, the Applicable Margin shall be
based on the numerically lower of the two Tier Levels (where Tier I is the
numerically lowest such Tier and Tier IV is the numerically highest such Tier)
unless the numerically higher Tier Level is two or more Tier Levels above the
numerically lower Tier Level, in which case the Tier Level which is one level
above the numerically lower Tier Level will apply.  In the event that one
rating falls within Tier Level IV and the other such rating is one rating level
immediately below (ie. either





                                      -3-
<PAGE>   10

BB or Ba2), then the Applicable Margin will be based on Tier Level IV;
provided, however that if the other such rating differs by more than one rating
immediately below (ie. either BB- or Ba3 or lower), then the Applicable Margin
shall be determined by reference to the Leverage Ratio as provided above.  If
the ratings established by Moody's or S&P for Senior Debt change (other than as
a result of a change in the rating system of Moody's or S&P), such change shall
be effective as of the date on which it is first announced by the applicable
rating agency.  If the rating system of either Moody's or S&P shall change when
a rating for Senior Debt exists from both Moody's and S&P or if either such
rating agency shall cease to be in the business of rating corporate debt
obligations while the other remains in such business, the Applicable Margin
shall be based on the rating of the agency that has not changed its rating
system or that remains in the business of rating corporate debt obligations.
If both Moody's and S&P shall change their rating system, cease rating the
Borrower's Senior Debt or cease to be in the business of rating corporate debt
obligations, then the Borrower and the Agent shall select a substitute
nationally recognized statistical rating agency or agencies, as the case may
be; provided, however that if the Borrower and the Agent cannot mutually agree
on such a substitute rating agency, the Applicable Margin shall be determined
by reference to the Borrower's Leverage Ratio as provided above.

     "Assignment and Acceptance" means an assignment and acceptance entered
into by a Bank and an Eligible Assignee, and accepted by the Agent, in
substantially the form of the attached Exhibit G.

     "Authorized Sale of Property" means any sale by the Borrower or any
Guarantor of (a) real property owned by the Borrower or such Guarantor which is
to be sold to a third party for fair market value, or (b) Revenue Equipment
owned by the Borrower or such Guarantor, to the extent such sale is in the
ordinary course of business; provided that in each case, such sale would not,
after giving effect to such sale, cause any Default.

     "Banks" means each of the lenders party to this Agreement, including
without limitation each Eligible Assignee that shall become a party to this
Agreement pursuant to Section 9.6.

     "Borrower" means Arkansas Best Corporation, a Delaware corporation, and
any successor, legal representative or permitted assignee thereof.

     "Borrower Security Agreement" means the Security Agreement dated of even
date herewith executed by the Borrower in substantially the form of Exhibit C,
as it may be amended from time to time in accordance with its terms.

     "Borrowing" means a Revolving Borrowing or the making of a Swingline
Advance by SG.

     "Borrowing Base" means an amount equal to the sum of (a) 80% of the Net
Depreciated Value of Eligible Revenue Equipment, plus (b) 50% of the Current
Market Value of Treadco Shares, plus (c) 85% of the aggregate outstanding
amount of Eligible Receivables, plus (d) 50% of the Net Depreciated Value of
Eligible Other Equipment, plus (e) 70% of the Real Estate Value of Eligible
Real Property.





                                      -4-
<PAGE>   11

     "Borrowing Base Certificate" means a certificate of the Borrower in
substantially the form of the attached Exhibit K.

     "Borrowing Base Determination Date" means any date the Borrowing Base is
determined in accordance with Section 2.14.

     "Business Day" means a day of the year on which banks are not required or
authorized to close in New York City or Dallas, Texas and, if the applicable
Business Day relates to any Eurodollar Rate Advances, on which dealings are
carried on by banks in the London interbank market.

     "Calculation Day" means the last day of each calendar quarter.

     "Calculation Period" means, with respect to any Calculation Day, the
period of the four consecutive calendar quarters ending on such day.

     "Canadian Subsidiaries" means, collectively, ABF Freight System (B.C.)
Ltd., a British Columbia corporation, ABF Freight System Canada, Ltd., a
Canadian corporation, and CaroTrans Canada, Ltd., a Canadian corporation.

     "Capital Expenditure" means any payment made directly or indirectly for
the purpose of acquiring or constructing fixed assets, real property or
equipment which in accordance with GAAP would be added as a debit to the fixed
asset account of such Person making such expenditure, including, without
limitation, amounts paid or payable for such purpose under any conditional sale
or other title retention agreement or under any Capital Lease, but excluding
repairs of Property made during such period in the normal and ordinary course
of business in keeping with past practices.

     "Capital Lease" means, for any Person, any lease of any Property (whether
real, personal or mixed) by that Person as lessee which, in accordance with
GAAP, is or should be accounted for as a capital lease on the balance sheet of
that Person.

     "Cash Collateral Account" means a special cash collateral account
containing cash deposited pursuant to Sections 2.7(c), 7.2(b) or 7.3(b) to be
maintained at the Agent's office in accordance with Section 7.4.

     "CERCLA" means the Comprehensive Environmental Response, Compensation, and
Liability Act of 1980, as amended, state and local analogs, and all rules and
regulations and requirements thereunder in each case as now or hereafter in
effect.

     "Code" means the Internal Revenue Code of 1986, as amended, and any
successor statute.

     "Co-Documentation Agents" means Bank of America National Trust and Savings
Association and Wells Fargo Bank (Texas), N.A., as co-documentation agents for
the Banks pursuant to Article VIII.

     "Collateral" shall have the meaning set forth in the Security Agreements.





                                      -5-
<PAGE>   12

     "Commitment" means, with respect to any Bank, such Bank's Revolving
Commitment.

     "Compliance Certificate" means a certificate of the Borrower in
substantially the form of the attached Exhibit J.

     "Consolidated" refers to the consolidation of the accounts of the Borrower
and its Subsidiaries in accordance with GAAP, including, when used in reference
to the Borrower, principles of consolidation consistent with those applied in
the preparation of the Financial Statements.

     "Control Percentage" means, with respect to any Person, the percentage of
the outstanding capital stock of such Person having ordinary voting power which
gives the direct or indirect holder of such stock the power to elect a majority
of the Board of Directors of such Person.

     "Controlled Group" means all members of a controlled group of corporations
and all trades (whether or not incorporated) under common control which,
together with the Borrower, are treated as a single employer under Section 414
of the Code.

     "Convert", "Conversion", and "Converted" each refers to a conversion of
Advances of one Type into Advances of another Type pursuant to Section 2.2(b).

     "Credit Documents" means this Agreement, the Notes, the Guaranty, the
Security Agreements, Hedge Agreements between the Borrower and any Bank or any
Affiliate of any Bank, the Agent's Fee Letter, and each other agreement,
instrument or document executed by the Borrower or any of its Subsidiaries at
any time in connection with this Agreement.

     "Current Market Value of Treadco Shares" means, as of any date of
determination thereof, (a) the number of shares of Treadco owned by the
Borrower or a wholly-owned Subsidiary of the Borrower and free and clear of all
Liens, other than Liens in favor of the Agent and the Agent for the benefit of
the Banks multiplied by (b) the most recent closing price of shares of Treadco
reported on the National Association of Securities Dealers Automated Quotations
System ("NASDAQ") National Market System or, if applicable, the average of the
closing bid and asked quotations for such security as reported on NASDAQ, or if
such shares become listed on another recognized national securities exchange,
the most recent closing price of such shares on such other exchange.

     "Debt Service"  means, for any Person for the period for which such amount
is being determined, (a) the amount (without duplication) of all scheduled
principal payments actually made and interest accrued with respect to any
Indebtedness of such Person and all payments made in respect of Capital Leases
of such Person, less (b) interest income earned by such Person.

     "Default" means (a) an Event of Default or (b) any event or condition
which with notice or lapse of time or both would, unless cured or waived,
become an Event of Default.





                                      -6-
<PAGE>   13

     "Dollar Equivalent" means the equivalent in another currency of an amount
in Dollars to be determined by reference to the rate of exchange quoted by the
Agent, at 10:00 a.m. (Dallas, Texas time) on the date of determination, for the
spot purchase in the foreign exchange market of such amount of Dollars with
such other currency.

     "Dollars" and "$" means lawful money of the United States of America.

     "Domestic Lending Office" means, with respect to any Bank, the office of
such Bank specified as its "Domestic Lending Office" opposite its name on
Schedule 9.2 or such other office of such Bank as such Bank may from time to
time specify to the Borrower and the Agent.

     "EBITDA" means, without duplication, for any period for which such amount
is being determined, the sum of the amounts for such period of (a) Adjusted
Consolidated operating income plus (b) to the extent deducted in determining
Adjusted Consolidated operating income, depreciation, amortization and surety
bonds and letter of credit fees.

     "Effective Date" means the date all of the conditions precedent set forth
in Section 3.1 have been satisfied, and the Agent shall have confirmed the same
in writing to the Banks.

     "Eligible Assignee" means (a) a commercial bank organized under the laws
of the United States, or any State thereof, and having primary capital of not
less than $250,000,000 and approved by the Agent, the Issuing Banks, and
(provided no Default has occurred and is continuing) the Borrower, which
approvals will not be unreasonably withheld, (b) a commercial bank organized
under the laws of any other country which is a member of the Organization for
Economic Cooperation and Development and having primary capital (or its
equivalent) of not less than $250,000,000 (or its Dollar Equivalent) and
approved by the Agent, the Issuing Banks, and (provided no Default has occurred
and is continuing) the Borrower, which approvals will not be unreasonably
withheld, (c) a Bank and approved by the Agent, the Issuing Banks, and
(provided no Default has occurred and is continuing) the Borrower, which
approvals will not be unreasonably withheld, and (d) an Affiliate of the
respective assigning Bank, without approval of any Person but otherwise meeting
the eligibility requirements of (a) or (b) above.

     "Eligible Other Equipment" means, as of any Borrowing Base Determination
Date, all Other Equipment which is owned by the Borrower or any Guarantor other
than a Canadian Subsidiary on such date and was so owned on the date of the
most recent Borrowing Base Certificate delivered to the Banks.

     "Eligible Real Property" means, as of any Borrowing Base Determination
Date, any real property (other than Properties which are acquired after the
date hereof and which are unacceptable to the Agent, in its sole reasonable
discretion) which is owned by the Borrower or any Guarantor on such date and
was so owned on the date of the most recent Borrowing Base Certificate
delivered to the Banks.

     "Eligible Receivables" means, as of any Borrowing Base Determination Date,
all Receivables of the Borrower or any Guarantor other than a Canadian
Subsidiary as of the date of the most recent Borrowing Base Certificate
delivered to the Banks, except:





                                      -7-
<PAGE>   14

              (1)     any Receivable which remains unpaid more than 90 days
after the date of the original invoice for such Receivable;

              (2)     any Receivable which is from an obligor which is to the
Borrower's or any Guarantor's knowledge Insolvent;

              (3)     any Receivable which is not to the Borrower's or any
Guarantor's knowledge free and clear of all Liens except (i) Liens in favor of
the Agent for the benefit of the Banks and (ii) Permitted Liens on Receivables
of a Intermodal Subsidiary described in Section 6.1(l) to the extent the
aggregate obligations secured by such Liens do not exceed $3,000,000 in the
aggregate;

              (4)     any Receivable which does not arise under a contract
representing the legal, valid and binding payment obligation of the obligor
thereon, enforceable by the Borrower or such Guarantor in accordance with its
terms;

              (5)     any Receivable which together with the related contract
does not comply in all material respects with all Legal Requirements of the
jurisdictions where it originated;

              (6)     any Receivable which does not provide, according to its
original terms, that the amount payable thereunder will be due within 60 days
following the date upon which the related obligor became obligated thereon;

              (7)     any Receivable which is payable by an obligor which is
located in any jurisdiction outside of the United States of America, Puerto
Rico or Canada;

              (8)     any Receivable which is unacceptable to the Majority
Banks for credit reasons in their reasonable discretion; and

              (9)     any Receivable which is payable by an Affiliate of the
Borrower (other than Treadco);

              (10)    any Receivable which is subject to setoff, counterclaim,
defense, allowance, dispute or adjustment other than allowances or discounts in
the ordinary course of business consistent with past practices.

     "Eligible Revenue Equipment" means, as of any Borrowing Base Determination
Date, all Revenue Equipment which is owned by the Borrower or any Guarantor
other than a Canadian Subsidiary as of such date and was so owned as of the
date of the most recent Borrowing Base Certificate delivered to the Banks.

     "Environment"  or "Environmental" shall have the meanings set forth in 42
U.S.C. ' 9601(8) (1998).

     "Environmental Claim" means any third party (including governmental
agencies and employees) action, lawsuit, claim, demand, regulatory action or
proceeding, order, decree,





                                      -8-
<PAGE>   15

consent agreement or notice of potential or actual responsibility or violation
(including claims or proceedings under the Occupational Safety and Health Acts
or similar laws or requirements relating to health or safety of employees)
which seeks to impose liability under any Environmental Law.

     "Environmental Law" means all Legal Requirements arising from, relating
to, or in connection with the Environment, health, or safety, including without
limitation CERCLA, relating to (a) pollution, contamination, injury,
destruction, loss, protection, cleanup, reclamation or restoration of the air,
surface water, groundwater, land surface or subsurface strata, or other natural
resources; (b) solid, gaseous or liquid waste generation, treatment,
processing, recycling, reclamation, cleanup, storage, disposal or
transportation; (c) exposure to pollutants, contaminants, hazardous, medical,
infectious, or toxic substances, materials or wastes; (d) the safety or health
of employees; or (e) the manufacture, processing, handling, transportation,
distribution in commerce, use, storage or disposal of hazardous, medical,
infectious, or toxic substances, materials or wastes.

     "Environmental Permit" means any permit, license, order, approval or other
authorization under Environmental Law.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time.

     "Eurocurrency Liabilities" has the meaning assigned to that term in
Regulation D of the Federal Reserve Board (or any successor), as in effect from
time to time.

     "Eurodollar Lending Office" means, with respect to any Bank, the office of
such Bank specified as its "Eurodollar Lending Office" opposite its name on
Schedule 9.2 (or, if no such office is specified, its Domestic Lending Office)
or such other office of such Bank as such Bank may from time to time specify to
the Borrower and the Agent.

     "Eurodollar Rate" means, for the Interest Period for each Eurodollar Rate
Advance comprising part of the same Borrowing, the interest rate per annum
(rounded upward to the nearest whole multiple of 1/100 of 1% per annum) equal
to (a) the rate set forth on the applicable Telerate Page as the London
Interbank Offered Rate, for deposits in Dollars at 11:00 a.m. (London, England
time)  two Business Days before the first day of such Interest Period and for a
period equal to such Interest Period; provided that, if no such quotation
appears on the applicable Telerate Page, the Eurodollar Rate shall be an
interest rate per annum equal to the rate per annum at which deposits in
Dollars are offered by the principal office of SG in London, England to prime
banks in the London interbank market at 11:00 a.m. (London, England time) two
Business Days before the first day of such Interest Period, in the case of
Advances made in Dollars in each case in an amount substantially equal to SG's
Eurodollar Rate Advance comprising part of such Borrowing and for a period
equal to such Interest Period divided by (b) one minus the applicable statutory
reserve requirements of the Agent, expressed as a decimal (including without
duplication or limitation, basic, supplemental, marginal and emergency
reserves), from time to time in effect under Regulation D or similar
regulations of the Federal Reserve Board.  It is





                                      -9-
<PAGE>   16

agreed that for purposes of this definition, Eurodollar Rate Advances made
hereunder shall be deemed to constitute Eurocurrency Liabilities as defined in
Regulation D and to be subject to the reserve requirements of Regulation D.

     "Eurodollar Rate Advance" means an Advance which bears interest as
provided in Section 2.6(b).

     "Events of Default" has the meaning set forth in Section 7.1.

     "Existing Credit Agreement" means the Amended and Restated Credit
Agreement dated as of February 21, 1996, as amended, among the Borrower, the
banks party thereto, SG, as Managing Agent and Administrative Agent, and
NationsBank of Texas, N.A., as Documentation Agent.

     "Existing Lien" means a mortgage Lien on real property which is existing
on the Effective Date and which is identified on Schedule 6.1.

     "Expiration Date" means, with respect to any Letter of Credit, the date on
which such Letter of Credit will expire or terminate in accordance with its
terms.

     "Federal Funds Rate" means, for any period, a fluctuating interest rate
per annum equal for each day during such period to the weighted average of the
rates on overnight Federal funds transactions with members of the Federal
Reserve System arranged by Federal funds brokers, as published for such day
(or, if such day is not a Business Day, for the next preceding Business Day) by
the Federal Reserve Bank of New York, or, if such rate is not so published for
any day which is a Business Day, the average of the quotations for any such day
on such transactions received by the Agent from three Federal funds brokers of
recognized standing selected by it.

     "Federal Reserve Board" means the Board of Governors of the Federal
Reserve System or any of its successors.

     "Financial Statements" means the financial statements described in Section
4.5.

     "Fuel Hedge Agreement" means a swap, collar, floor, cap, option, forward
sale or purchase  or other similar arrangement between the Borrower or any of
its Subsidiaries and a financial institution which is intended to reduce or
eliminate the risk of fluctuations in the price of fuel.

     "Fund," "Trust Fund," or "Superfund" means the Hazardous Substance
Response Trust Fund, established pursuant to 42 U.S.C. ' 9631 (1988) and the
Post-closure Liability Trust Fund, established pursuant to 42 U.S.C. ' 9641
(1988), which statutory provisions have been amended or repealed by the
Superfund Amendments and Reauthorization Act of 1986, and the "Fund," "Trust
Fund," or "Superfund" that are now maintained pursuant to ' 9507 of the Code.

     "GAAP" means United States generally accepted accounting principles as in
effect from time to time, applied on a basis consistent with the requirements
of Section 1.3.





                                      -10-
<PAGE>   17

     "Governmental Authority" means any foreign governmental authority, the
United States of America, any state of the United States of America and any
subdivision of any of the foregoing, and any agency, department, commission,
board, authority or instrumentality, bureau or court having jurisdiction over
any Bank, the Borrower, or the Borrower's Subsidiaries or any of their
respective Properties.

     "Governmental Proceedings" means any action or proceedings by or before
any Governmental Authority, including, without limitation, the promulgation,
enactment or entry of any Legal Requirement.

     "Guarantor" means each Subsidiary of the Borrower that is a party to the
Guaranty, and "Guarantors" means such Persons collectively.  The Guarantors on
the Effective Date are identified on Schedule 4.1.

     "Guarantors Security Agreement" means the Security Agreement dated of even
date herewith executed by the Guarantors in substantially the form of Exhibit
D, as it may be amended from time to time in accordance with its terms.

     "Guaranty" means the Subsidiary Guaranty and Contribution Agreement dated
of even date herewith in substantially the form of the attached Exhibit B
executed by certain Subsidiaries of the Borrower, as it may be amended
hereafter in accordance with its terms.

     "Hazardous Substance" means the substances identified as such pursuant to
CERCLA and those regulated under any other Environmental Law, including without
limitation pollutants, contaminants, petroleum, petroleum products,
radionuclides, radioactive materials, and medical and infectious waste.

     "Hazardous Waste" means the substances regulated as such pursuant to any
Environmental Law.

     "Hedge Agreement" means any Interest Hedge Agreement or any Fuel Hedge
Agreement.

     "Hedging Obligations" means all obligations of the Borrower or any of its
Subsidiaries under any Hedge Agreement.

     "Indenture" means the Indenture dated as of April 15, 1986 between the
Borrower (as successor in interest to Carolina Freight Corporation) and First
Union National Bank of North Carolina, N.A. (formerly known as First Union
National Bank), as Trustee, as it may be amended or supplemented in accordance
with its terms.

     "Indebtedness" means (without duplication), at any time and with respect
to any Person, (a) indebtedness of such Person for borrowed money (whether by
loan or the issuance and sale of debt securities) or for the deferred purchase
price of property or services purchased (other than amounts constituting trade
payables or bank drafts (payable within 120 days) arising in the ordinary
course); (b)  indebtedness of others which such Person has directly or
indirectly





                                      -11-
<PAGE>   18

assumed or guaranteed or otherwise provided credit support therefor; (c)
indebtedness of others secured by a Lien on assets of such Person, whether or
not such Person shall have assumed such indebtedness; (d)  obligations of such
Person in respect of letters of credit, surety bonds, acceptance facilities, or
drafts or similar instruments issued or accepted by banks and other financial
institutions for the account of such Person (other than trade payables or bank
drafts (payable within 120 days) arising in the ordinary course); (e)
obligations of such Person under Capital Leases; and (f) outstanding amount of
preferred trust securities or other similar arrangements.

     "Insolvent" means, with respect to any Person, that (a) the present fair
saleable value of such Person's assets is less than the amount that will be
required to pay its probable liability on its then existing legal liabilities,
either matured or unmatured, liquidated or unliquidated, absolute, fixed or
contingent, as they become absolute or matured, or (b) the property remaining
in its hands is an unreasonably small capital for the business or transaction
in which it is engaged or is about to engage.

     "Interest Expense" means, for any Person, for any period for which such
amount is being determined, total interest expense (including that properly
attributable to Capital Leases in accordance with GAAP and amortization of debt
discount and debt issuance costs), including, without limitation, all
capitalized interest if such interest would be in excess of $100,000 in any
fiscal year, all commissions and other fees, discounts, and charges incurred
with respect to surety bonds and letters of credit.

     "Interest Hedge Agreement" means an interest hedge, rate swap or cap or
other similar arrangement between the Borrower or any of its Subsidiaries and a
financial institution providing for the exchange of nominal interest
obligations or the cap of the interest rate on the Advances made under this
Agreement.

     "Interest Period" means, for each Eurodollar Rate Advance comprising part
of the same Borrowing, the period commencing on the date of such Advance or the
date of the Conversion of any Prime Rate Advance into such an Advance and
ending on the last day of the period selected by the Borrower pursuant to the
provisions below and Section 2.2 and, thereafter, each subsequent period
commencing on the last day of the immediately preceding Interest Period and
ending on the last day of the period selected by the Borrower pursuant to the
provisions below and Section 2.2.  The duration of each such Interest Period
shall be one, two or three weeks (with respect to the initial Advances only),
or one, two, three or six (or to the extent available to all of the Banks,
twelve) months, in each case as the Borrower may, upon notice received by the
Agent not later than 11:00 a.m. (Dallas, Texas time) on the third Business Day
prior to the first day of such Interest Period (except as otherwise provided in
Section 2.2(a)), select; provided, however, that:

              (1)     Interest Periods commencing on the same date for Advances
comprising part of the same Borrowing shall be of the same duration;





                                      -12-
<PAGE>   19

              (2)     whenever the last day of any Interest Period would
otherwise occur on a day other than a Business Day, the last day of such
Interest Period shall be extended to occur on the next succeeding Business Day,
provided that if such extension would cause the last day of such Interest
Period to occur in the next following calendar month, the last day of such
Interest Period shall occur on the next preceding Business Day; and

              (3)     any Interest Period which begins on the last Business Day
of a calendar month (or on a day for which there is no numerically
corresponding day in the calendar month at the end of such Interest Period)
shall end on the last Business Day of the calendar month in which it would have
ended if there were a numerically corresponding day in such calendar month.

     "Intermodal Subsidiary" means any Subsidiary of the Borrower which
contracts for the benefit of its customers the railroad shipment of such
customer's goods with any railroad company.

     "Issuing Bank" means SG or any other Bank which agrees at the request of
the Borrower to act as issuer of a Letter of Credit hereunder, or any Bank
acting as a successor issuing bank pursuant to Section 8.6, and "Issuing Banks"
means, collectively, all of such Banks.

     "Legal Requirement" means any law, statute, ordinance, decree,
requirement, order, judgment, rule, regulation (or official interpretation of
any of the foregoing) of, and the terms of any license or permit issued by, any
Governmental Authority.

     "Letter of Credit" means, individually, any letter of credit issued by an
Issuing Bank which is subject to this Agreement, including, without limitation,
the letters of credit described on Schedule 1.1(b), and "Letters of Credit"
means all such letters of credit collectively.

     "Letter of Credit Documents" means, with respect to any Letter of Credit,
such Letter of Credit and any agreements, documents, and instruments entered
into in connection with or relating to such Letter of Credit.

     "Letter of Credit Exposure" means, at any time, the sum of (a) the
aggregate undrawn maximum face amount of each Letter of Credit at such time and
(b) the aggregate unpaid amount of all Reimbursement Obligations at such time.

     "Letter of Credit Obligations" means any obligations of the Borrower under
this Agreement in connection with the Letters of Credit.

     "Leverage Ratio" means the ratio of the Borrower's Adjusted Consolidated
Indebtedness to its EBITDA.

     "Lien" means any mortgage, lien, pledge, charge, deed of trust, security
interest, encumbrance or other type of preferential arrangement to secure or
provide for the payment of any obligation of any Person, whether arising by
contract, operation of law or otherwise (including, without limitation, the
interest of a vendor or lessor under any conditional sale agreement, Capital
Lease or other title retention agreement).





                                      -13-
<PAGE>   20

     "Liquid Investments" means:

              (1)     direct obligations of, or obligations the principal of
and interest on which are unconditionally guaranteed by, the United States;

              (2)     (i) negotiable or nonnegotiable certificates of deposit,
time deposits, or other similar banking arrangements maturing within 180 days
from the date of acquisition thereof ("bank debt securities"), issued by (A)
any Bank or (B) any other bank or trust company which has a combined capital
surplus and undivided profit of not less than $250,000,000 or the Dollar
Equivalent thereof, if at the time of deposit or purchase, such bank debt
securities are rated not less than "A" (or the then equivalent) by the rating
service of S&P or of Moody's, and (ii) commercial paper issued by (A) any Bank
or (B) any other Person if at the time of purchase such commercial paper is
rated not less than "A-2" (or the then equivalent) by the rating service of S&P
or not less than "P-2" (or the then equivalent) by the rating service of
Moody's, or upon the discontinuance of both of such services, such other
nationally recognized rating service or services, as the case may be, as shall
be selected by the Borrower with the consent of the Majority Banks;

              (3)     repurchase agreements relating to investments described
in clauses (a) and (b) above with a market value at least equal to the
consideration paid in connection therewith, with any Person who regularly
engages in the business of entering into repurchase agreements and has a
combined capital surplus and undivided profit of not less than $250,000,000 or
the Dollar Equivalent thereof, if at the time of entering into such agreement
the debt securities of such Person are rated not less than "A" (or the then
equivalent) by the rating service of S&P or of Moody's; and

              (4)     shares of any mutual fund registered under the Investment
Company Act of 1940, as amended, which invests solely in underlying securities
of the types described in clauses (a), (b) and (c) above and which do not
constitute "margin stock" within the meaning of Regulation U of the Federal
Reserve Board; and

              (5)     such other instruments (within the meaning of Article 9
of the Texas Business and Commerce Code) as the Borrower may request and the
Majority Banks may approve in writing, which approval will not be unreasonably
withheld.

     "Majority Banks" means, at any time, Banks holding at least 51% of the
then aggregate unpaid principal amount of the Notes held by the Banks and the
participation interest in the Letter of Credit Exposure of the Banks at such
time, or, if no such principal amount and Letter of Credit Exposure is then
outstanding, Banks having at least 51% of the aggregate amount of the Revolving
Commitments at such time.

     "Mandatory Revolving Borrowing" means a Revolving Borrowing comprised of
Prime Rate Advances made to repay a Swingline Advance which has not been repaid
to SG on the date due.





                                      -14-
<PAGE>   21

     "Material Adverse Change" shall mean a material adverse change in the
business, financial condition, or results of operations of the Borrower or any
Guarantor, in each case since the date of the Financial Statements.

     "Maturity Date" means June 12, 2003.

     "Maximum Rate" means the maximum nonusurious interest rate under
applicable law.

     "Moody's" means Moody's Investors Service, Inc. and any successor thereto
which is a nationally recognized statistical rating organization.

     "Multiemployer Plan" means a "multiemployer plan" as defined in Section
4001(a)(3) of ERISA to which the Borrower or any member of the Controlled Group
is making or accruing an obligation to make contributions.

     "Net Cash Proceeds" means (a) the aggregate cash proceeds (including
without limitation, insurance proceeds) received by the Borrower or any
Guarantor in connection with any sales, transfers or dispositions of assets,
minus (b) the reasonable expenses of the Borrower or such Guarantor in
connection with any such sales, transfers or dispositions of assets.

     "Net Depreciated Value" means, with respect to Revenue Equipment and Other
Equipment, the aggregate value of such Revenue Equipment and Other Equipment on
the books of the Borrower or any Guarantor as of the date of acquisition
thereof by the Borrower or such Guarantor or the actual cost of such Revenue
Equipment or Other Equipment to the Borrower or such Guarantor, whichever is
less (the "Cost"), minus depreciation computed to the date of the most recent
Borrowing Base Certificate delivered to the Banks at a rate sufficient to
depreciate such Revenue Equipment and Other Equipment, as appropriate, to the
extent, and in the periods, set forth below on a straight-line basis to a
customary residual value:

              city tractors:  within seven years

              trucks:  within five years

              tractors (other than city tractors): within three years

              trailers:  within seven years

              Other Equipment:  within fifteen years

     "Net Income" means, for any Person for any period for which such amount is
being determined, the net income of such Person after taxes, as determined in
accordance with GAAP, excluding, however, extraordinary items, including but
not limited to (a) any net gain or loss during such period arising from the
sale, exchange, or other disposition of capital assets (such term to include
all fixed assets and all securities) other than in the ordinary course of
business and (b) any write-up or write-down of assets.





                                      -15-
<PAGE>   22

     "Net Purchase Price" means the aggregate cash consideration paid  in
connection with any Acquisition Expenditure plus any assumptions of
Indebtedness in connection with such Acquisition Expenditure.

     "Net Worth" means, for any Person, stockholders' equity of such Person
determined in accordance with GAAP.

     "Note" means a Revolving Note or the Swingline Note.

     "Notice of Borrowing" means a notice of borrowing in the form of the
attached Exhibit E signed by a Responsible Officer of the Borrower.

     "Notice of Conversion or Continuation" means a notice of conversion or
continuation in the form of the attached Exhibit F signed by a Responsible
Officer of the Borrower.

     "Obligations" means all Advances, Reimbursement Obligations, Hedging
Obligations owing to any Bank or any Affiliate of a Bank and other amounts
payable by the Borrower to the Agent or the Banks under the Credit Documents.

     "Other Equipment" means, with respect to any Person, equipment other than
Revenue Equipment, free and clear of all Liens other than Permitted Liens.

     "PBGC" means the Pension Benefit Guaranty Corporation or any entity
succeeding to any or all of its functions under ERISA.

     "Permitted Liens" means the Liens permitted to exist pursuant to Section
6.1.

     "Person" means an individual, partnership, corporation (including a
business trust), joint stock company, trust, unincorporated association,
limited liability company, joint venture or other entity, or a government or
any political subdivision or agency thereof or any trustee, receiver, custodian
or similar official.

     "Plan" means an employee benefit plan (other than a Multiemployer Plan)
maintained for employees of the Borrower or any member of the Controlled Group
and covered by Title IV of ERISA or subject to the minimum funding standards
under Section 412 of the Code.

     "Prime Rate" means a fluctuating interest rate per annum as shall be in
effect from time to time equal to the rate of interest publicly announced by
Societe Generale, New York Branch as its prime commercial lending rate (which
may not be the lowest rate offered to its customers), whether or not the
Borrower has notice thereof.

     "Prime Rate Advance" means an Advance which bears interest as provided in
Section 2.6(a).

     "Property" of any Person means any property or assets (whether real,
personal, or mixed, tangible or intangible) of such Person.





                                      -16-
<PAGE>   23

     "Pro Rata Share" means, at any time with respect to any Bank, either (a)
the ratio (expressed as a percentage) of such Bank's Revolving Commitment at
such time to the aggregate Revolving Commitments at such time or (b) if the
Revolving Commitments have been terminated, the ratio (expressed as a
percentage) of such Bank's aggregate outstanding Advances and participation
interest in the Letter of Credit Exposure at such time to the aggregate
outstanding Advances and Letter of Credit Exposure of all the Banks at such
time.

     "Real Estate Value" means, with respect to any Eligible Real Property, (a)
the net book value of such Eligible Real Property as of the date of the most
recent Borrowing Base Certificate delivered to the Banks less (b) the aggregate
amount of Indebtedness (other than bond Indebtedness which is supported by a
Letter of Credit) secured by Liens on such Property.

     "Receivables" means all rights to receive payment for goods sold or for
services rendered in the ordinary course of business.

     "Register" has the meaning set forth in paragraph (c) of Section 9.6.

     "Reimbursement Obligations" means all of the obligations of the Borrower
set forth in Section 2.13(c).

     "Release" shall have the meaning set forth in CERCLA or under any other
Environmental Law.

     "Reportable Event" means any of the events set forth in Section 4043(b) of
ERISA.

     "Response" shall have the meaning set forth in CERCLA or under any other
Environmental Law.

     "Responsible Officer" means the Chief Executive Officer, President, Chief
Financial Officer, any Treasurer or Secretary of any Person.

     "Restricted Payment" means (a) any direct or indirect payment, prepayment,
redemption, purchase, or deposit of funds or Property for the payment
(including any sinking fund or defeasance), prepayment, redemption or purchase
of Subordinated Debt, and (b) the making by any Person of any dividends or
other distributions (in cash, property, or otherwise) on, or payment for the
purchase, redemption or other acquisition of, any shares of any capital stock
or other ownership interests of such Person, other than dividends payable in
such Person's stock or ownership interests.

     "Revenue Equipment" means, with respect to any Person, trucks, tractors,
trailers, city tractors, converter gears and all accessories and parts attached
thereto, owned by such Person as of the date of determination free and clear of
all Liens other than Permitted Liens.

     "Revolving Advance" means any advance by a Bank to the Borrower pursuant
to Section 2.1(a).





                                      -17-
<PAGE>   24

     "Revolving Borrowing" means a borrowing consisting of simultaneous
Revolving Advances of the same Type made by each Bank pursuant to Section
2.1(a) or Converted by each Bank to Revolving Advances of a different Type
pursuant to Section 2.2(b).

     "Revolving Commitment" means, with respect to any Bank, the amount set
opposite such Bank's name on Schedule 1.1(a) as its Revolving Commitment, or if
such Bank has entered into any Assignment and Acceptance, the amount set forth
for such Bank as its Revolving Commitment in the Register maintained by the
Agent pursuant to Section 9.6(c), as such amount may be reduced pursuant to
Section 2.4.

     "Revolving Note" means a promissory note of the Borrower payable to the
order of any Bank, in substantially the form of the attached Exhibit A,
evidencing indebtedness of the Borrower to such Bank resulting from Revolving
Advances owing to such Bank.

     "Rolling Period" means with respect to any fiscal quarter of the Borrower,
such fiscal quarter and the three immediately preceding fiscal quarters.

     "S&P" means Standard & Poor's Ratings Service, a division of McGraw-Hill
Companies, Inc., or any successor thereof which is a nationally recognized
statistical rating organization.

     "Security Agreements" means, collectively, the Borrower Security
Agreement, the Guarantors Security Agreement, and any other agreement executed
in connection with the Liens in favor of the Agent for the benefit of the Banks
securing the Obligations.

     "Senior Debt" means the Senior Secured Debt or the Senior Unsecured Debt;
provided however, that if Moody's and/or S&P have different ratings for both
the Senior Secured Debt and the Senior Unsecured Debt, then "Senior Debt" shall
mean the Senior Secured Debt; provided further however, that if the Collateral
securing this Agreement has been released pursuant to Section 2.17(f), then
"Senior Debt" shall mean the Senior Unsecured Debt.

     "Senior Secured Debt" means the Borrower's senior, secured, non-credit
enhanced, long-term indebtedness for borrowed money.

     "Senior Unsecured Debt" means the Borrower's senior, unsecured, non-credit
enhanced, long-term indebtedness for borrowed money; provided however, that if
either Moody's or S&P does not rate the Borrower's Senior Unsecured Debt, then
"Senior Unsecured Debt" shall mean for the purposes of determining such rating
agency's applicable rating, the Borrower's "corporate credit rating".

     "SG" means Societe Generale, Southwest Agency.

     "Subordinated Debentures" means the 6 1/4% Convertible Subordinated
Debentures Due 2011 issued by the Borrower pursuant to the Indenture in the
original aggregate principal amount of $50,000,000, of which $44,883,000 is
outstanding on the date of this Agreement.





                                      -18-
<PAGE>   25

     "Subordinated Debt" means (a) the Subordinated Debentures, and (b) any
Indebtedness of the Borrower or any of its Subsidiaries which is subordinated
to their respective obligations under the Credit Documents and which is on
terms and conditions satisfactory to the Agent and the Banks.

     "Subordinated Debt Documents" means the Indenture, the Subordinated
Debentures and all documents, instruments and agreements now or hereafter
executed by the Borrower or any of its Subsidiaries in respect of Subordinated
Debt and any and all amendments, modifications, supplements, renewals or
restatements thereof approved in accordance with Section 6.2.

     "Subsidiary" of a Person means any corporation, association, partnership
or other business entity of which more than 50% of the outstanding shares of
capital stock (or other equivalent interests) having by the terms thereof
ordinary voting power under ordinary circumstances to elect a majority of the
board of directors or Persons performing similar functions (or, if there are no
such directors or Persons, having general voting power) of such entity
(irrespective of whether at the time capital stock (or other equivalent
interests) of any other class or classes of such entity shall or might have
voting power upon the occurrence of any contingency) is at the time directly or
indirectly owned or controlled by such Person, by such Person and one or more
Subsidiaries of such Person or by one or more Subsidiaries of such Person.

     "Swingline Advance" has the meaning set forth in Section 2.1(b).

     "Swingline Note" means a promissory note of the Borrower payable to the
order of SG in substantially the form of the attached Exhibit L, evidencing the
indebtedness of the Borrower to SG from Swingline Advances owing to SG.

     "Termination Event" means (a) the occurrence of a Reportable Event with
respect to a Plan, as described in Section 4043 of ERISA and the regulations
issued thereunder (other than a Reportable Event not subject to the provision
for 30-day notice to the PBGC under such regulations), (b) the withdrawal of
the Borrower or any of its Affiliates from a Plan during a plan year in which
it was a "substantial employer" as defined in Section 4001(a)(2) of ERISA, (c)
the giving of a notice of intent to terminate a Plan under Section 4041(c) of
ERISA, (d) the institution of proceedings to terminate a Plan by the PBGC, or
(e) any other event or condition which constitutes grounds under Section 4042
of ERISA for the termination of, or the appointment of a trustee to administer,
any Plan.

     "Treadco" means Treadco, Inc., a Delaware corporation, which is an
Affiliate of the Borrower.

     "Type" has the meaning set forth in Section 1.4.

     "Year 2000 Compliant" means that all software, embedded microchips, and
other processing capabilities utilized by, and material to the business
operations or financial condition of, the Borrower and its Subsidiaries are
able to correctly perform all date-sensitive functions prior to and after
December 31, 1999.





                                      -19-
<PAGE>   26

     Section I.2      Computation of Time Periods.  In this Agreement in the
computation of periods of time from a specified date to a later specified date,
the word "from" means "from and including" and the words "to" and "until" each
means "to but excluding".

     Section I.3      Accounting Terms; Changes in GAAP.

              (1)     All accounting terms not specifically defined in this
Agreement shall be construed in accordance with GAAP applied on a consistent
basis with those applied in the preparation of the Financial Statements.

              (2)     Unless otherwise indicated, all financial statements of
the Borrower, all calculations for compliance with covenants in this Agreement,
and all calculations of any amounts to be calculated under the definitions in
Section 1.1 shall be based upon the Consolidated accounts of the Borrower and
its Subsidiaries in accordance with GAAP.

              (3)     If any changes in accounting principles after the
Effective Date are required by GAAP or the Financial Accounting Standards Board
of the American Institute of Certified Public Accountants or similar agencies
results in a change in the method of calculation of, or affects the results of
such calculation of, any of the financial covenants, standards or terms found
in this Agreement, then the parties shall enter into and diligently pursue
negotiations in order to amend such financial covenants, standards or terms so
as to equitably reflect such change, with the desired result that the criteria
for evaluating the Borrower's and its Consolidated Subsidiaries' financial
condition shall be the same after such change as if such change had not been
made.

     Section I.4      Types of Advances.  Advances are distinguished by "Type".
The "Type" of an Advance refers to the determination whether such Advance is a
Eurodollar Rate Advance or Prime Rate Advance, each of which constitutes a Type.

     Section I.5      Miscellaneous.  Article, Section, Schedule and Exhibit
references are to Articles and Sections of and Schedules and Exhibits to this
Agreement, unless otherwise specified.


                                   ARTICLE II

                    THE ADVANCES AND THE LETTERS OF CREDIT

     Section II.1     The Advances.

              (1)     Revolving Advances.  Each Bank severally agrees, on the
terms and conditions set forth in this Agreement, to make Revolving Advances to
the Borrower from time to time on any Business Day prior to the Maturity Date
in an aggregate amount not to exceed at any time outstanding an amount equal to
such Bank's Revolving Commitment less such Bank's Pro Rata Share of the Letter
of Credit Exposure at such time.  The aggregate amount of all





                                      -20-
<PAGE>   27

outstanding Revolving Advances, Swingline Advances and Letter of Credit
Exposure at any time may not exceed the lesser of (i) the aggregate Revolving
Commitments at such time or (ii) the Borrowing Base at such time.  Within the
limits of each Bank's Revolving Commitment and the Borrowing Base limitation
set forth above, the Borrower may from time to time prepay pursuant to Section
2.7 and reborrow under this Section 2.1(a).

              (2)     Swingline Advances.  On the terms and conditions set
forth in this Agreement, SG may, in its sole discretion from time-to-time on
any Business Day during the period from the date of this Agreement until the
Maturity Date, make advances ("Swingline Advances") under the Swingline Note to
the Borrower in an aggregate principal amount not to exceed $15,000,000
outstanding at any time; provided that the aggregate principal amount of
outstanding Revolving Advances, Swingline Advances, and Letter of Credit
Exposure may not exceed the lesser of (i)  the aggregate Revolving Commitments
at such time or (ii) the Borrowing Base at such time; and provided further than
no Swingline Advance shall be made by SG if the statements set forth in Section
3.2(a) are not true on the date of such Swingline Advance, it being agreed by
the Borrower that the giving of the applicable Notice of Borrowing and the
acceptance by the Borrower of the proceeds of such Swingline Advance shall
constitute a representation and warranty by the Borrower that on the date of
such Swingline Advance such statements are true.  Subject to the other
provisions hereof, the Borrower may from time-to-time borrow, prepay (in whole
or in part) and reborrow Swingline Advances.

                      (1)      Except as provided in the following clause (B)
     below, each request for a Swingline Advance shall be made pursuant to
     telephone notice to SG given no later than 11:00 a.m. (Dallas, Texas time)
     on the date of the proposed Swingline Advance, promptly confirmed by a
     completed and executed Notice of Borrowing telecopied to the Agent.   SG
     will promptly make the Swingline Advance available to the Borrower at the
     Borrowers' account with the Agent.

                      (2)      The Borrower and the Banks agree that in the
     event any Swingline Advance is not repaid on the date due to SG, each Bank
     shall pay to the Agent its Pro Rata Share of such Swingline Advance and
     such payment shall be deemed to be a Prime Rate Advance made pursuant to
     such Bank's Revolving Commitment, whether made before or after termination
     of the Commitments, acceleration of the Advances, or otherwise, and
     whether or not the conditions precedent in Section 3.2 have been
     satisfied.  The Agent shall give each Bank notice of such Mandatory
     Revolving Borrowing by 11:00 a.m. (Dallas, Texas time) on the date the
     Mandatory Revolving Borrowing is to be made.  Each Bank shall make its
     Advance available to the Agent for the account of SG in immediately
     available funds by 1:00 p.m. (Dallas, Texas time) on the date requested,
     and the Borrower hereby irrevocably instructs SG to apply the proceeds of
     such Mandatory Revolving Borrowing to the payment of the outstanding
     Swingline Advances.

     Section II.2     Method of Borrowing.

              (1)     Notice.  Each Revolving Borrowing shall be made pursuant
to a Notice of Borrowing, given not later than (i) 11:00 a.m. (Dallas, Texas
time) on the third Business Day before the date of the proposed Borrowing, in
the case of a Eurodollar Rate Advance or





                                      -21-
<PAGE>   28

(ii) 11:00 a.m. (Dallas, Texas time) on the Business Day of the proposed
Borrowing, in the case of a Prime Rate Advance, by the Borrower to the Agent,
which shall give to each Bank prompt notice on the day of receipt of timely
Notice of Borrowing of such proposed Borrowing by telecopier; provided however
that the Agent and each of the Banks hereby waive the requirement in subsection
(i) of this Section 2.2(a) that the Borrower provide three Business Days
advance written notice of the date of the initial Borrowing.  Each Swingline
Advance shall be made pursuant to a Notice of Borrowing, given not later than
11:00 a.m. (Dallas, Texas time) on the day of the proposed Borrowing.  Each
Notice of Borrowing shall be in writing or by telecopier specifying the
requested (a) date of such Borrowing, (b) Type of Advances comprising such
Borrowing, (c) aggregate amount of such Borrowing, and (d) if such Borrowing is
to be comprised of Eurodollar Rate Advances, the Interest Period for each such
Advance.  In the case of a proposed Borrowing comprised of Eurodollar Rate
Advances, the Agent shall promptly notify each Bank of the applicable interest
rate under Section 2.6(b).  Each Bank shall (1) in the case of all Revolving
Borrowings other than Borrowings made on the same day as the day the Notice of
Borrowing is received, before 11:00 a.m. (Dallas, Texas time) on the date of
such Borrowing and (2) in the case of Revolving Borrowings made on the same day
as the date of the Notice of Borrowing or Mandatory Revolving Borrowings,
before 1:00 p.m. (Dallas, Texas time), make available for the account of its
Applicable Lending Office to the Agent at its address referred to in Section
9.2, or such other location as the Agent may specify by notice to the Banks, in
same day funds, such Bank's Pro Rata Share of such Borrowing.  After the
Agent's receipt of such funds and upon fulfillment of the applicable conditions
set forth in Article III, the Agent will make such funds available to the
Borrower at its account with the Agent.

              (2)     Conversions and Continuations.  In order to elect to
Convert or continue Advances comprising part of the same Revolving Borrowing
under this Section, the Borrower shall deliver an irrevocable Notice of
Conversion or Continuation to the Agent at the Agent's office no later than
11:00 a.m. (Dallas, Texas time) (i) on the Business Day of the proposed
conversion date in the case of a Conversion of such Advances to Prime Rate
Advances and (ii) at least three Business Days in advance of the proposed
Conversion or continuation date in the case of a Conversion to, or a
continuation of, Eurodollar Rate Advances.  Each such Notice of Conversion or
Continuation shall be in writing or by telecopier, specifying (a) the requested
Conversion or continuation date (which shall be a Business Day), (b) the
Borrowing amount and Type of the Advances to be Converted or continued, (c)
whether a Conversion or continuation is requested, and if a Conversion, into
what Type of Advances, and (d) in the case of a Conversion to, or a
continuation of, Eurodollar Rate Advances, the requested Interest Period.
Revolving Advances may only be Converted or continued as Revolving Advances.
Swingline Advances may not be converted or continued.  Promptly after receipt
of a Notice of Conversion or Continuation under this paragraph, the Agent shall
provide each Bank with a copy thereof and, in the case of a Conversion to or a
Continuation of Eurodollar Rate Advances, notify each Bank of the applicable
interest rate under Section 2.6(b).  For purposes other than the conditions set
forth in Section 3.2, the portion of Revolving Advances comprising part of the
same Revolving Borrowing that are Converted to Revolving Advances of another
Type shall constitute a new Revolving Borrowing.

              (3)     Certain Limitations.  Notwithstanding anything in
paragraphs (a) and (b) above:





                                      -22-
<PAGE>   29

                               (1)     each Borrowing (other than a Borrowing
              of Swingline Advances) shall be in an aggregate amount not less
              than $2,000,000 or greater multiples of $1,000,000, in the case
              of Eurodollar Rate Advances, or $1,000,000 or greater multiples
              of $100,000, in the case of Prime Rate Advances, and shall
              consist of Advances of the same Type made on the same day by the
              Banks ratably according to their respective Commitments.

                               (2)     at no time shall there be more than five
              Interest Periods applicable to outstanding Eurodollar Rate
              Advances;

                               (3)     the Borrower may not select Eurodollar
              Rate Advances for any Borrowing to be made, Converted or
              continued if (A) the aggregate amount of such Borrowing is less
              than $2,000,000 or (B) a Default has occurred and is continuing;

                               (4)     (A) if any Bank shall, at any time prior
              to the making of any requested Borrowing comprised of Eurodollar
              Rate Advances, notify the Agent that the introduction of or any
              change in or in the interpretation of any law or regulation makes
              it unlawful, or that any central bank or other governmental
              authority asserts that it is unlawful, for such Bank or its
              Eurodollar Lending Office to perform its obligations under this
              Agreement to make Eurodollar Rate Advances or to fund or maintain
              Eurodollar Rate Advances, such Bank's Pro Rata Share of such
              Borrowing shall be made as a Prime Rate Advance of such Bank, but
              otherwise shall be considered part of the same Borrowing and
              interest on such Prime Rate Advance shall be due and payable at
              the same time that interest on the Eurodollar Rate Advances
              comprising the remainder of such Borrowing shall be due and
              payable; and (B) such Bank agrees to use commercially reasonable
              efforts (consistent with its internal policies and legal and
              regulatory restrictions) to designate a different Applicable
              Lending Office if the making of such designation would avoid the
              effect of this paragraph and would not, in the reasonable
              judgment of such Bank, be otherwise disadvantageous to such Bank;

                               (5)     if the Agent is unable to determine the
              Eurodollar Rate for Eurodollar Rate Advances comprising any
              requested Borrowing, the right of the Borrower to select
              Eurodollar Rate Advances for such Borrowing or for any subsequent
              Borrowing shall be suspended until the Agent shall notify the
              Borrower and the Banks that the circumstances causing such
              suspension no longer exist, and each Advance comprising such
              Borrowing shall be a Prime Rate Advance;

                               (6)     if the Majority Banks shall, at least
              one Business Day before the date of any requested Borrowing,
              notify the Agent that the Eurodollar Rate for Eurodollar Rate
              Advances comprising such Borrowing will not adequately reflect
              the cost to such Banks of making or funding their respective
              Eurodollar Rate Advances, as the case may be, for such Borrowing,
              the right of the Borrower to select





                                      -23-
<PAGE>   30

              Eurodollar Rate Advances for such Borrowing or for any subsequent
              Borrowing shall be suspended until the Agent shall notify the
              Borrower and the Banks that the circumstances causing such
              suspension no longer exist, and each Advance comprising such
              Borrowing shall be a Prime Rate Advance; and

                               (7)     if the Borrower shall fail to select the
              duration or continuation of any Interest Period for any
              Eurodollar Rate Advances in accordance with the provisions
              contained in the definition of "Interest Period" in Section 1.1
              and paragraph (a) or (b) above, the Agent will forthwith so
              notify the Borrower and the Banks and such Advances will be made
              available to the Borrower on the date of such Borrowing as Prime
              Rate Advances or, if an existing Advance, Converted into Prime
              Rate Advances.

              (4)     Notices Irrevocable.  Each Notice of Borrowing and Notice
of Conversion or Continuation shall be irrevocable and binding on the Borrower.
In the case of any Borrowing which the related Notice of Borrowing specifies is
to be comprised of Eurodollar Rate Advances, the Borrower shall indemnify each
Bank against any loss, out-of-pocket cost or expense incurred by such Bank as a
result of any condition precedent for Borrowing set forth in Article III not
being satisfied for any reason, including, without limitation, any loss, cost
or expense actually incurred by reason of the liquidation or reemployment of
deposits or other funds acquired by such Bank to fund the Advance to be made by
such Bank as part of such Borrowing when such Advance, as a result of such
failure, is not made on such date.

              (5)     Agent Reliance.   Unless the Agent shall have received
notice from a Bank before the date of any Revolving Borrowing or Mandatory
Revolving Borrowing that such Bank will not make available to the Agent such
Bank's Pro Rata Share of the Borrowing, the Agent may assume that such Bank has
made its Pro Rata Share of such Borrowing available to the Agent on the date of
such Borrowing in accordance with paragraph (a) of this Section 2.2 and the
Agent may, in reliance upon such assumption, make available to the Borrower on
such date a corresponding amount.  If and to the extent that such Bank shall
not have so made its Pro Rata Share of such Borrowing available to the Agent,
such Bank and the Borrower severally agree to immediately repay to the Agent on
demand such corresponding amount, together with interest on such amount, for
each day from the date such amount is made available to the Borrower until the
date such amount is repaid to the Agent, at (i) in the case of the Borrower,
the interest rate applicable on such day to Advances comprising such Borrowing
and (ii) in the case of such Bank, the Federal Funds Rate for such day.  If
such Bank shall repay to the Agent such corresponding amount and interest as
provided above, such corresponding amount so repaid shall constitute such
Bank's Advance as part of such Borrowing for purposes of this Agreement even
though not made on the same day as the other Advances comprising such
Borrowing.

              (6)     Bank Obligations Several.  The failure of any Bank to
make the Advance to be made by it as part of any Borrowing shall not relieve
any other Bank of its obligation, if any, to make its Advance on the date of
such Borrowing.  No Bank shall be responsible for the failure of any other Bank
to make the Advance to be made by such other Bank on the date of any Borrowing.





                                      -24-
<PAGE>   31

              (7)     Notes.  The indebtedness of the Borrower to each Bank
resulting from Revolving Advances owing to such Bank shall be evidenced by the
Revolving Note of the Borrower payable to the order of such Bank in
substantially the form of Exhibit A.  The indebtedness of the Borrower to SG
resulting from Swingline Advances owing to SG shall be evidenced by the
Swingline Note of the Borrower payable to the order of SG in substantially the
form of Exhibit L.

     Section II.3     Fees.

              (1)     Commitment Fees.  The Borrower agrees to pay to the Agent
for the account of each Bank a commitment fee on the average daily amount by
which such Bank's Revolving Commitment exceeds the sum of such Bank's
outstanding Revolving Advances and Pro Rata Share of the Letter of Credit
Exposure at a rate per annum equal to the Applicable Margin for the period from
the Effective Date until the Maturity Date, such fees due and payable quarterly
in arrears on the last Business Day of each March, June, September and December
and on the Maturity Date.

              (2)     Letter of Credit Fees.  The Borrower agrees to pay to the
Agent for the pro rata benefit of the Banks, fees in respect of all Letters of
Credit outstanding at a rate per annum equal to the Applicable Margin
calculated on the maximum amount available from time to time to be drawn under
such outstanding Letters of Credit, payable in arrears (i) on and through the
last Business Day of each March, June, September and December and (ii) on the
Maturity Date.  In addition, the Borrower agrees to pay to each Issuing Bank
for its own account fees in respect of all Letters of Credit outstanding and
issued by such Issuing Bank equal to one-eighth percent (1/8%) per annum of the
maximum amount available from time to time to be drawn under such outstanding
Letters of Credit, payable in arrears on the last Business Day of each March,
June, September and December and on the Maturity Date.

              (3)     Agent Fees.  The Borrower agrees to pay to the Agent for
its benefit the fees set forth in the Agent's Fee Letter.

     Section II.4     Reduction of the Revolving Commitments.

              (1)     Voluntary Reduction.  The Borrower shall have the right,
upon at least three Business Days' irrevocable notice to the Agent, to
terminate in whole or reduce ratably in part the unused portion of the
Revolving Commitments; provided that each partial reduction shall be in the
aggregate amount of $1,000,000 or an integral multiple of $1,000,000.  Any
reduction or termination of the Revolving Commitments pursuant to this Section
2.4 shall be permanent, with no obligation of the Banks to reinstate such
Revolving Commitments and the commitment fees provided for in Section 2.3(a)
shall thereafter be computed on the basis of the Revolving Commitments, as so
reduced.





                                      -25-
<PAGE>   32

              (2)     Change of Control.  Upon the occurrence of any of the
following:

              (i) a change in control is reported by the Borrower in response
              to either Item 6(e) of Schedule 14A of Regulation 14A promulgated
              under the Securities Exchange Act of 1934 (the "Exchange Act"),
              or (ii) any "person" (as such term is used in Section 13(d) and
              Section 14(d)(2) of the Exchange Act) is or becomes the
              "beneficial owner" (as defined in Rule 13d-3 under the Exchange
              Act), directly or indirectly, of securities of the Borrower
              representing the Control Percentage or more of the combined
              voting power of the Borrower's then outstanding securities;
              then, in such event the Majority Banks may, at their sole option
              upon written notice to the Borrower (a "Termination Notice"),
              declare the obligation of each Bank to make Advances and the
              obligation of each Issuing Bank to issue, increase, or extend
              Letters of Credit to be terminated, whereupon the same shall
              forthwith terminate and the Revolving Commitments shall reduce to
              zero.

     Section II.5     Repayment of Advances.

              (1)     Revolving Advances.  The Borrower shall repay the
outstanding principal amount of each Revolving Advance on the Maturity Date.

              (2)     Swingline Advances.  The Borrower shall repay the
outstanding principal amount of each Swingline Advance on the earlier of the
Maturity Date or the date which is three Business Days after the date such
Swingline Advance was made.

     Section II.6     Interest.  The Borrower shall pay interest on the unpaid
principal amount of each Advance from the date of such Advance until such
principal amount shall be paid in full, at the following rates per annum:

              (1)     Prime Rate Advances.  If such Advance is a Prime Rate
Advance, a rate per annum equal at all times to the lesser of (i) the Adjusted
Prime Rate in effect from time to time plus the Applicable Margin and (ii) the
Maximum Rate, payable in arrears on the last Business Day of each calendar
quarter and on the date such Prime Rate Advance shall be paid in full, provided
that any amount of principal which is not paid when due (whether at stated
maturity, by acceleration or otherwise) shall bear interest from the date on
which such amount is due until such amount is paid in full, payable on demand,
at a rate per annum equal at all times to the lesser of (a) the rate required
to be paid on such Advance immediately prior to the date on which such amount
becomes due plus two percent (2%) and (b) the Maximum Rate.

              (2)     Eurodollar Rate Advances.  If such Advance is a
Eurodollar Rate Advance, a rate per annum equal at all times during the
Interest Period for such Advance to the lesser of (i) the Eurodollar Rate for
such Interest Period plus the Applicable Margin and (ii) the Maximum Rate,
payable in arrears on the last day of such Interest Period, and on the date
such Eurodollar Rate Advance shall be paid in full; provided that any amount of
principal which is not paid when due (whether at stated maturity, by
acceleration or otherwise) shall bear interest from the date on which such
amount is due until such amount is paid in full, payable on demand, at a rate
per annum equal at all times to the lesser of (A) the greater of (1) the
Adjusted Prime Rate in effect from time to time plus two percent (2%) and (2)
the rate required to be paid on such Advance immediately prior to the date on
which such amount became due plus two percent (2%) and (B) the Maximum Rate.





                                      -26-
<PAGE>   33

              (3)     Swingline Advances.  If such Advance is a Swingline
Advance, a rate per annum equal at all times to the lesser of (i) the rate
agreed to pursuant to the Letter Agreement dated as of April 17, 1998 between
SG and the Borrower and (ii) the Maximum Rate, payable in arrears on the date
such Advance shall be paid in full, provided that any amount of principal which
is not paid when due (whether at stated maturity, by acceleration or otherwise)
shall bear interest from the date on which such amount is due until such amount
is paid in full, payable on demand, at a rate per annum equal at all times to
the lesser of (A) the rate required to be paid on such Advance immediately
prior to the date on which such amount becomes due plus two percent (2%) and
(B) the Maximum Rate.

              (4)     Usury Recapture.  In the event the rate of interest
chargeable under this Agreement or the Notes at any time is greater than the
Maximum Rate, the unpaid principal amount of the Notes shall bear interest at
the Maximum Rate until the total amount of interest paid or accrued on the
Notes equals the amount of interest which would have been paid or accrued on
the Notes if the stated rates of interest set forth in this Agreement had at
all times been in effect.  In the event, upon payment in full of the Notes, the
total amount of interest paid or accrued under the terms of this Agreement and
the Notes is less than the total amount of interest which would have been paid
or accrued if the rates of interest set forth in this Agreement had, at all
times, been in effect, then the Borrower shall, to the extent permitted by
applicable law, pay the Agent for the account of the Banks an amount equal to
the difference between (i) the lesser of (A) the amount of interest which would
have been charged on the Notes if the Maximum Rate had, at all times, been in
effect and (B) the amount of interest which would have accrued on the Notes if
the rates of interest set forth in this Agreement had at all times been in
effect and (ii) the amount of interest actually paid or accrued under this
Agreement on the Notes.  In the event the Banks ever receive, collect or apply
as interest any sum in excess of the Maximum Rate, such excess amount shall, to
the extent permitted by law, be applied to the reduction of the principal
balance of the Notes, and if no such principal is then outstanding, such excess
or part thereof remaining shall be paid to the Borrower.

              (5)     Other Amounts Overdue.  If any amount payable under this
Agreement other than the Advances is not paid when due and payable, including
without limitation, accrued interest and fees, then such overdue amount shall
accrue interest hereon due and payable on demand at a rate per annum equal to
the Adjusted Prime Rate plus two percent (2%), from the date such amount became
due until the date such amount is paid in full.

     Section II.7     Prepayments.

              (1)     Right to Prepay.  The Borrower shall have no right to
prepay any principal amount of any Advance except as provided in this Section
2.7.

              (2)     Optional Prepayments.  The Borrower may elect to prepay
any of the Advances, after giving notice thereof to the Agent (i) by 11:00 a.m.
(Dallas, Texas time)  on the day of prepayment of any Swingline Advance, and
(ii) by 11:00 a.m. (Dallas Texas time) at least





                                      -27-
<PAGE>   34

three Business Days' prior to the day of prepayment of any Eurodollar Rate
Advances, and at least one Business Day prior to the day of prepayment of any
Prime Rate Advances.  Such notice must state the proposed date and aggregate
principal amount of such prepayment, whether such prepayment should be applied
to reduce outstanding Revolving Advances or Swingline Advances, and if
applicable, the relevant Interest Period for the Advances to be prepaid.  If
any such notice is given, the Borrower shall prepay Advances comprising part of
the same Borrowing in whole or ratably in part in an aggregate principal amount
equal to the amount specified in such notice, and shall also pay accrued
interest to the date of such prepayment on the principal amount prepaid and
amounts, if any, required to be paid pursuant to Section 2.8 as a result of
such prepayment being made on such date; provided, however, that each partial
prepayment of Eurodollar Rate Advances shall be in an aggregate principal
amount not less than $1,000,000 or an integral multiple of $1,000,000.

              (3)     Mandatory Prepayments.

                      (1)      Change of Control.  On the fifth Business Day
     following the Borrower's receipt of a Termination Notice pursuant to
     Section 2.4(b) hereof, the Borrower shall be required to prepay all
     outstanding Advances in full and to deposit with the Agent into the Cash
     Collateral Account an amount equal to the Letter of Credit Exposure.

                      (2)      Borrowing Base Deficiency.  On each Borrowing
     Base Determination Date, the Borrower shall be required to prepay the
     Advances in an aggregate amount equal to the excess of (A) the aggregate
     amount of outstanding Advances and Letter of Credit Exposure on such date
     over (B) the Borrowing Base, as determined on such Borrowing Base
     Determination Date (or, upon payment in full of all outstanding Advances,
     to deposit with the Agent into the Cash Collateral Account an amount equal
     to the amount of the Letter of Credit Exposure which exceeds the Borrowing
     Base).

                      (3)      Reduction of Revolving Commitments.  In the
     event the Revolving Commitments are reduced in accordance with Section
     2.4(a), the Borrower shall prepay the Advances to the extent the
     outstanding Advances plus the Letter of Credit Exposure exceed the reduced
     Revolving Commitments (or, upon payment in full of all outstanding
     Advances, to deposit with the Agent into the Cash Collateral Account an
     amount equal to the amount of the Letter of Credit Exposure which exceeds
     the Revolving Commitments as so reduced).

                      (4)      Accrued Interest.  Each prepayment pursuant to
     this Section 2.7(c) shall be accompanied by accrued interest on the amount
     prepaid to the date of such prepayment and amounts, if any, required to be
     paid pursuant to Section 2.8 as a result of such prepayment being made on
     such date.

                      (5)      Avoidance of Breakage Costs.  In the event that
     the amount of any mandatory prepayment of Advances under this Section
     2.7(c) exceeds the aggregate principal amount of Advances which consist of
     Prime Rate Advances (the amount of such excess being the "Excess Amount"),
     the Borrower shall have the right, in lieu of making such prepayment in
     full, to prepay such outstanding Advances which are Prime Rate





                                      -28-
<PAGE>   35

     Advances and to deposit an amount equal to the Excess Amount with the
     Agent in the Cash Collateral Account maintained by and in the sole
     dominion and control of the Agent for the ratable benefit of the Banks.
     Any amount so deposited shall be held by the Agent as collateral for the
     Obligations and applied to the prepayment of Advances which are Eurodollar
     Rate Advances at the end of the current Interest Period(s) applicable
     thereto.  On any day on which amounts collected in the Cash Collateral
     Account remain on deposit in or to the credit of the Cash Collateral
     Account after giving effect to the payment made on such day pursuant to
     this Section 2.7(c), and the Borrower shall have delivered to the Agent a
     written request or a telephonic request (which shall be promptly confirmed
     in writing) prior to 10:00 am (Dallas, Texas time) that such remaining
     collected amounts be invested in cash equivalents specified in such
     request, the Agent shall invest such funds, to the extent the Agent is
     reasonably able to do so, in such cash equivalents as are acceptable to,
     and with no risk to, the Agent on an overnight basis or with maturities
     such that amounts will be available to pay the Obligations secured thereby
     as they become due, whether at maturity, by acceleration or otherwise;
     provided, however, that any loss resulting from such investments shall be
     charged to and be immediately payable by the Borrower on demand by the
     Agent.

              (4)     Ratable Payments.  Each payment of any Advance pursuant
to this Section 2.7 or any other provision of this Agreement shall be made in a
manner such that all Advances comprising part of the same Borrowing are paid in
whole or ratably in part.

              (5)     Effect of Notice.  All notices given pursuant to this
Section 2.7 shall be irrevocable and binding upon the Borrower.

     Section II.8     Breakage Costs.  If (a) any payment of principal of any
Eurodollar Rate Advance is made other than on the last day of the Interest
Period for such Advance as a result of any payment pursuant to Section 2.7 or
the acceleration of the maturity of the Notes pursuant to Article VIII or
otherwise; (b) any Conversion of a Eurodollar Rate Advance is made other than
on the last day of the Interest Period for such Advance pursuant to Section
2.12 or otherwise; or (c) the Borrower fails to make a principal or interest
payment with respect to any Eurodollar Rate Advance on the date such payment is
due and payable, the Borrower shall, within 10 days of any written demand sent
by any Bank to the Borrower through the Agent, pay to the Agent for the account
of such Bank any amounts (without duplication of any other amounts payable in
respect of breakage costs) required to compensate such Bank for any additional
losses, out-of-pocket costs or expenses which it may reasonably incur as a
result of such payment or nonpayment, including, without limitation, any loss
(including loss of anticipated profits), cost or expense incurred by reason of
the liquidation or reemployment of deposits or other funds acquired by any Bank
to fund or maintain such Advance.

     Section II.9     Increased Costs.

              (1)     Eurodollar Rate Advances.  If, due to either (i) the
introduction of or any change (other than any change by way of imposition or
increase of reserve requirements included in the calculation of the Eurodollar
Rate) in or in the interpretation of any law or regulation or (ii) the
compliance with any guideline or request from any central bank or other
Governmental





                                      -29-
<PAGE>   36

Authority (whether or not having the force of law), there shall be any increase
in the cost to any Bank of agreeing to make or making, funding or maintaining
Eurodollar Rate Advances, then the Borrower shall from time to time, upon
demand by such Bank (with a copy of such demand to the Agent), immediately pay
to the Agent for the account of such Bank additional amounts (without
duplication of any other amounts payable in respect of increased costs)
sufficient to compensate such Bank for such increased cost; provided, however,
that, before making any such demand, each Bank agrees to use commercially
reasonable efforts (consistent with its internal policy and legal and
regulatory restrictions) to designate a different Applicable Lending Office if
the making of such a designation would avoid the need for, or reduce the amount
of, such increased cost and would not, in the reasonable judgment of such Bank,
be otherwise disadvantageous to such Bank.  A certificate as to the amount of
such increased cost and detailing the calculation of such cost submitted to the
Borrower and the Agent by such Bank at the time such Bank demands payment under
this Section shall be conclusive and binding for all purposes, absent manifest
error.

              (2)     Capital Adequacy.  If any Bank or any Issuing Bank
determines in good faith that compliance with any law or regulation or any
guideline or request from any central bank or other governmental authority
(whether or not having the force of law) implemented or effective after the
date of this Agreement affects or would affect the amount of capital required
or expected to be maintained by such Bank or such Issuing Bank and that the
amount of such capital is increased by or based upon the existence of such
Bank's commitment to lend or such Issuing Bank's commitment to issue Letters of
Credit or any Bank's commitment to risk participate in Letters of Credit and
other commitments of this type, then, upon 30 days prior written notice by such
Bank or such Issuing Bank (with a copy of any such demand to the Agent), the
Borrower shall immediately pay to the Agent for the account of such Bank or to
such Issuing Bank, as the case may be, from time to time as specified by such
Bank or such Issuing Bank, additional amounts (without duplication of any other
amounts payable in respect of increased costs) sufficient to compensate such
Bank or such Issuing Bank, in light of such circumstances, (i) with respect to
such Bank, to the extent that such Bank reasonably determines such increase in
capital to be allocable to the existence of such Bank's commitment to lend
under this Agreement or its commitment to risk participate in Letters of Credit
and (ii) with respect to such Issuing Bank, to the extent that such Issuing
Bank reasonably determines such increase in capital to be allocable to the
issuance or maintenance of the Letters of Credit.  A certificate as to such
amounts and detailing the calculation of such amounts submitted to the Borrower
by such Bank or such Issuing Bank shall be conclusive and binding for all
purposes, absent manifest error.

              (3)     Letters of Credit.  If any change in any law or
regulation or in the interpretation thereof by any court or administrative or
Governmental Authority charged with the administration thereof shall either (i)
impose, modify, or deem applicable any reserve, special deposit, or similar
requirement against letters of credit issued by, or assets held by, or deposits
in or for the account of, any Issuing Bank or any Bank or (ii) impose on such
Issuing Bank or any Bank any other condition regarding the provisions of this
Agreement relating to the Letters of Credit or any Letter of Credit
Obligations, and the result of any event referred to in the preceding clause
(i) or (ii) shall be to increase the cost to such Issuing Bank of issuing or
maintaining any Letter of Credit, or increase the cost to such Bank of its risk
participation in any Letter of Credit





                                      -30-
<PAGE>   37

(which increase in cost shall be determined by such Issuing Bank's or such
Bank's reasonable allocation of the aggregate of such cost increases resulting
from such event), then, upon demand by such Issuing Bank or such Bank (with a
copy sent to the Agent), as the case may be, the Borrower shall pay to the
Agent (for the account of such Issuing Bank), as the case may be, from time to
time as specified by such Issuing Bank or such Bank, additional amounts which
shall be sufficient to compensate such Issuing Bank or such Bank for such
increased cost.  Each Issuing Bank and each Bank agrees to use commercially
reasonable efforts (consistent with internal policy and legal and regulatory
restrictions) to designate a different Applicable Lending Office for the
booking of its Letters of Credit or risk participations if the making of such
designation would avoid the effect of this paragraph and would not, in the
reasonable judgment of such Issuing Bank or such Bank, be otherwise
disadvantageous to such Issuing Bank or such Bank, as the case may be.  A
certificate as to such increased cost incurred by such Issuing Bank or such
Bank, as the case may be, as a result of any event mentioned in clause (i) or
(ii) above, and detailing the calculation of such increased costs submitted by
such Issuing Bank or such Bank to the Borrower, shall be conclusive and binding
for all purposes, absent manifest error.

     Section II.10    Payments and Computations.

              (1)     Payment Procedures.  Except if otherwise set forth
herein, the Borrower shall make each payment under this Agreement and under the
Notes not later than 11:00 a.m. (Dallas, Texas time) on the day when due in
Dollars to the Agent at the location referred to in the Notes (or such other
location as the Agent shall designate in writing to the Borrower) in same day
funds.  The Agent will promptly thereafter cause to be distributed like funds
relating to the payment of principal, interest or fees ratably (other than
amounts payable solely to the Agent, the Issuing Banks, or a specific Bank
pursuant to Section 2.1(b), 2.3(b), 2.3(c), 2.6(c), 2.8, 2.9, 2.11, 2.12, or
2.13(c) but after taking into account payments effected pursuant to Section
9.4) to the Banks in accordance with each Bank's Pro Rata Share for the account
of their respective Applicable Lending Offices, and like funds relating to the
payment of any other amount payable to any Bank or any Issuing Bank to such
Bank or such Issuing Bank for the account of its Applicable Lending Office, in
each case to be applied in accordance with the terms of this Agreement.

              (2)     Computations.  All computations of interest based on the
Adjusted Prime Rate shall be made by the Agent on the basis of a year of 365 or
366 days, as the case may be, and all computations of fees and interest based
on the Eurodollar Rate and the Federal Funds Rate shall be made by the Agent on
the basis of a year of 360 days, in each case for the actual number of days
(including the first day, but excluding the last day) occurring in the period
for which such interest or fees are payable.  Each determination by the Agent
of an interest rate shall be conclusive and binding for all purposes, absent
manifest error.

              (3)     Non-Business Day Payments.  Whenever any payment shall be
stated to be due on a day other than a Business Day, such payment shall be made
on the next succeeding Business Day, and such extension of time shall in such
case be included in the computation of payment of interest or fees, as the case
may be; provided, however, that if such extension would cause payment of
interest on or principal of Eurodollar Rate Advances to be made in the next
following calendar month, such payment shall be made on the next preceding
Business Day.





                                      -31-
<PAGE>   38

              (4)     Agent Reliance.  Unless the Agent shall have received
written notice from the Borrower prior to the date on which any payment is due
to the Banks that the Borrower will not make such payment in full, the Agent
may assume that the Borrower has made such payment in full to the Agent on such
date and the Agent may, in reliance upon such assumption, cause to be
distributed to each Bank on such date an amount equal to the amount then due
such Bank.  If and to the extent the Borrower shall not have so made such
payment in full to the Agent, each Bank shall repay to the Agent forthwith on
demand such amount distributed to such Bank, together with interest, for each
day from the date such amount is distributed to such Bank until the date such
Bank repays such amount to the Agent, at the Federal Funds Rate for such day.

              (5)     Application of Payments.  Unless otherwise specified in
Section 2.7 hereof, whenever any payment received by the Agent under this
Agreement is insufficient to pay in full all amounts then due and payable under
this Agreement and the Notes, such payment shall be distributed and applied by
the Agent and the Banks in the following order:  first, to the payment of fees
and expenses due and payable to the Agent under and in connection with this
Agreement or any other Credit Document; second, to the payment of all expenses
due and payable under Section 2.11(c), ratably among the Banks in accordance
with the aggregate amount of such payments owed to each such Bank; third, to
the payment of fees due and payable to the Issuing Banks pursuant to Section
2.3(b); fourth, to the payment of all other fees due and payable under Section
2.3 ratably among the Banks in accordance with their applicable Commitments;
and fifth, to the payment of the interest accrued on and the principal amount
of all of the Notes and the interest accrued on and all Reimbursement
Obligations, regardless of whether any such amount is then due and payable,
ratably among the Banks in accordance with the aggregate accrued interest plus
the aggregate principal amount owed to such Bank.

     Section II.11    Taxes.

              (1)     No Deduction for Certain Taxes.  Any and all payments by
the Borrower shall be made, in accordance with Section 2.10, free and clear of
and without deduction for any and all present or future taxes, levies, imposts,
deductions, charges or withholdings, and all liabilities with respect thereto,
excluding, in the case of each Bank, each Issuing Bank, and the Agent, taxes
imposed on its income, and franchise taxes imposed on it, by the jurisdiction
under the laws of which such Bank, such Issuing Bank, or the Agent (as the case
may be) is organized or any political subdivision of the jurisdiction (all such
nonexcluded taxes, levies, imposts, deductions, charges, withholdings and
liabilities being hereinafter referred to as "Taxes") and, in the case of each
Bank and each Issuing Bank, Taxes by the jurisdiction of such Bank's Applicable
Lending Office or any political subdivision of such jurisdiction.  If the
Borrower shall be required by law to deduct any Taxes from or in respect of any
sum payable to any Bank, any Issuing Bank, or the Agent, (i) the sum payable
shall be increased as may be necessary so that, after making all required
deductions (including deductions applicable to additional sums payable under
this Section 2.11), such Bank, such Issuing Bank, or the Agent (as the case may
be) receives an amount equal to the sum it would have received had no such
deductions been made; provided, however, that if the Borrower's obligation to
deduct or withhold Taxes is caused solely by such





                                      -32-
<PAGE>   39

Bank's, such Issuing Bank's, or the Agent's failure to provide the forms
described in paragraph (e) of this Section 2.11 and such Bank, such Issuing
Bank, or the Agent could have provided such forms, no such increase shall be
required; (ii) the Borrower shall make such deductions; and (iii) the Borrower
shall pay the full amount deducted to the relevant taxation authority or other
authority in accordance with applicable law.

              (2)     Other Taxes.  In addition, the Borrower agrees to pay any
present or future stamp or documentary taxes or any other excise or property
taxes, charges or similar levies which arise from any payment made or from the
execution, delivery or registration of, or otherwise with respect to, this
Agreement, the Notes, or the other Credit Documents (hereinafter referred to as
"Other Taxes").

              (3)     Indemnification.  The Borrower indemnifies each Bank,
each Issuing Bank, and the Agent for the full amount of Taxes or Other Taxes
(including, without limitation, any Taxes or Other Taxes imposed by any
jurisdiction on amounts payable under this Section 2.11) paid by such Bank,
such Issuing Bank, or the Agent (as the case may be) and any liability
(including interest and expenses) arising therefrom or with respect thereto,
whether or not such Taxes or Other Taxes were correctly or legally asserted.
Each payment required to be made by the Borrower in respect of this
indemnification shall be made to the Agent for the benefit of any party
claiming such indemnification within 30 days from the date the Borrower
receives written demand detailing the calculation of such amounts therefor from
the Agent on behalf of itself as Agent, any Issuing Bank, or any such Bank.  If
any Bank, the Agent, or any Issuing Bank receives a refund in respect of any
taxes paid by the Borrower under this paragraph (c), such Bank, the Agent, or
such Issuing Bank, as the case may be, shall promptly pay to the Borrower the
Borrower's share of such refund.

              (4)     Evidence of Tax Payments.  The Borrower will pay prior to
delinquency all Taxes payable in respect of any payment.  Within 30 days after
the date of any payment of Taxes, the Borrower will furnish to the Agent, at
its address referred to in Section 9.2, the original or a certified copy of a
receipt evidencing payment of such Taxes.

              (5)     Foreign Bank Withholding Exemption.  Each Bank and each
Issuing Bank that is not incorporated under the laws of the United States of
America or a state thereof agrees that it will deliver to the Borrower and the
Agent on the date of this Agreement or upon the effectiveness of any Assignment
and Acceptance (i) two duly completed copies of United States Internal Revenue
Service Form 1001 or 4224 or successor applicable form, as the case may be,
certifying in each case that such Bank is entitled to receive payments under
this Agreement and the Notes payable to it, without deduction or withholding of
any United States federal income taxes, (ii) if applicable, an Internal Revenue
Service Form W-8 or W-9 or successor applicable form, as the case may be, to
establish an exemption from United States backup withholding tax, and (iii) any
other governmental forms which are necessary or required under an applicable
tax treaty or otherwise by law to reduce or eliminate any withholding tax,
which have been reasonably requested by the Borrower.  Each Bank which delivers
to the Borrower and the Agent a Form 1001 or 4224 and Form W-8 or W-9 pursuant
to the next preceding sentence further undertakes to deliver to the Borrower
and the Agent two further copies of Form 1001 or 4224





                                      -33-
<PAGE>   40

and Form W-8 or W-9, or successor applicable forms, or other manner of
certification, as the case may be, on or before the date that any such form
expires or becomes obsolete or after the occurrence of any event requiring a
change in the most recent form previously delivered by it to the Borrower and
the Agent, and such extensions or renewals thereof as may reasonably be
requested by the Borrower and the Agent certifying in the case of a Form 1001
or 4224 that such Bank is entitled to receive payments under this Agreement
without deduction or withholding of any United States federal income taxes.  If
an event (including without limitation any change in treaty, law or regulation)
has occurred prior to the date on which any delivery required by the preceding
sentence would otherwise be required which renders all such forms inapplicable
or which would prevent any Bank from duly completing and delivering any such
letter or form with respect to it and such Bank advises the Borrower and the
Agent that it is not capable of receiving payments without any deduction or
withholding of United States federal income tax, and in the case of a Form W-8
or W-9, establishing an exemption from United States backup withholding tax,
such Bank shall not be required to deliver such forms.  The Borrower shall
withhold tax at the rate and in the manner required by the laws of the United
States with respect to payments made to a Bank failing to timely provide the
requisite Internal Revenue Service forms.

     Section II.12    Illegality.  If any Bank shall notify the Agent and the
Borrower that the introduction of or any change in or in the interpretation of
any law or regulation makes it unlawful, or that any central bank or other
Governmental Authority asserts that it is unlawful for such Bank or its
Eurodollar Lending Office to perform its obligations under this Agreement to
maintain any Eurodollar Rate Advances of such Bank then outstanding hereunder,
then, notwithstanding anything herein to the contrary, the Borrower shall, if
demanded by such Bank in its notice, no later than 11:00 a.m. (Dallas, Texas
time), (a) if not prohibited by law or regulation to maintain such Eurodollar
Rate Advances for the duration of the Interest Period, on the last day of the
Interest Period for each outstanding Eurodollar Rate Advance of such Bank or
(b) if prohibited by law or regulation to maintain such Eurodollar Rate
Advances for the duration of the Interest Period, on the second Business Day
following its receipt of such notice from such Bank, Convert all Eurodollar
Rate Advances of such Bank then outstanding to Prime Rate Advances, and pay
accrued interest on the principal amount Converted to the date of such
Conversion and amounts, if any, required to be paid pursuant to Section 2.8 as
a result of such Conversion being made on such date.  Each Bank agrees to use
commercially reasonable efforts (consistent with its internal policies and
legal and regulatory restrictions) to designate a different Applicable Lending
Office if the making of such designation would avoid the effect of this
paragraph and would not, in the reasonable judgment of such Bank, be otherwise
disadvantageous to such Bank.

     Section II.13    Letters of Credit.

              (1)     Issuance.  From time to time from the date of this
Agreement until three months before the Maturity Date, at the request of the
Borrower, each Issuing Bank shall, on any Business Day and on the terms and
conditions hereinafter set forth, issue, increase, decrease, amend, or extend
the expiration date of Letters of Credit for the account of the Borrower (for
its own benefit or for the benefit of any of its Subsidiaries).  No Letter of
Credit will be issued, increased, or extended (i) if such issuance, increase,
or extension would cause the





                                      -34-
<PAGE>   41

Letter of Credit Exposure to exceed the lesser of (A) $75,000,000 or (B) an
amount equal to (1) the lesser of the Borrowing Base or the aggregate Revolving
Commitments less (2) the aggregate outstanding Revolving Advances, Swingline
Advances and Letter of Credit Exposure at such time; (ii) unless such Letter of
Credit has an Expiration Date not later than the earlier of (A) one year after
the date of issuance thereof and (B) five days before the Maturity Date; (iii)
unless such Letter of Credit is in form and substance acceptable to the
respective Issuing Bank in its sole discretion; (iv) unless such Letter of
Credit is a standby letter of credit not supporting the repayment of
indebtedness for borrowed money of any Person, other than a Letter of Credit
issued in substitution of any letter of credit outstanding on the Effective
Date and listed on Schedule 1.1(b); (v) unless the Borrower has delivered to
the respective Issuing Bank a completed and executed letter of credit
application on such Issuing Bank's standard form, which shall contain terms no
more restrictive than the terms of this Agreement; and (vi) unless such Letter
of Credit is governed by the Uniform Customs and Practice for Documentary
Credits (1993 Revision), International Chamber of Commerce Publication No.  500
("UCP") or any successor to the UCP.  If the terms of any letter of credit
application referred to in the foregoing clause (v) conflicts with the terms of
this Agreement, the terms of this Agreement shall control.

              (2)     Participations.  With respect to each Letter of Credit
described on Schedule 1.1(b) which is outstanding on the Effective Date, each
Bank agrees that it has a participation in the related Letter of Credit
Exposure equal to such Bank's Pro Rata Share on the Effective Date.  On the
date of the issuance or increase of any Letter of Credit on or after the
Effective Date, each Issuing Bank shall be deemed to have sold to each other
Bank and each other Bank shall have been deemed to have purchased from such
Issuing Bank a participation in the Letter of Credit Exposure related to the
Letters of Credit issued by such Issuing Bank equal to such Bank's Pro Rata
Share at such date and such sale and purchase shall otherwise be in accordance
with the terms of this Agreement.  Each Issuing Bank shall promptly notify each
such participant Bank by telex, telephone, or telecopy of each Letter of Credit
of such Issuing Bank issued, increased or decreased, and the actual dollar
amount of such Bank's participation in such Letter of Credit.  Each Bank's
obligation to purchase participating interests pursuant to this Section and to
reimburse the respective Issuing Bank for such Bank's Pro Rata Share of any
payment under a Letter of Credit by such Issuing Bank not reimbursed in full by
the Borrower shall be absolute and unconditional and shall not be affected by
any circumstance, including, without limitation, (i) any of the circumstances
described in paragraph (d) below, (ii) the occurrence and continuance of a
Default, (iii) an adverse change in the financial condition of the Borrower or
any Guarantor, or (iv) any other circumstance, happening or event whatsoever,
whether or not similar to any of the foregoing, except for any such
circumstance, happening or event constituting or arising from gross negligence
or willful misconduct on the part of such Issuing Bank.

              (3)     Reimbursement.  The Borrower hereby agrees to pay on
demand to each Issuing Bank in respect of each Letter of Credit issued by such
Issuing Bank an amount equal to any amount paid by such Issuing Bank under or
in respect of such Letter of Credit.  In the event any Issuing Bank makes a
payment pursuant to a request for draw presented under a Letter of Credit and
such payment is not promptly reimbursed by the Borrower upon demand, such
Issuing Bank shall give notice of such payment to the Agent and the Banks, and
each Bank shall promptly reimburse such Issuing Bank for such Bank's Pro Rata
Share of such payment, and such





                                      -35-
<PAGE>   42

reimbursement shall be deemed for all purposes of this Agreement to constitute
a Prime Rate Advance to the Borrower from such Bank.  If such reimbursement is
not made by any Bank to any Issuing Bank on the same day on which such Issuing
Bank shall have made payment on any such draw, such Bank shall pay interest
thereon to such Issuing Bank at a rate per annum equal to the Federal Funds
Rate.  The Borrower hereby unconditionally and irrevocably authorizes,
empowers, and directs the Agent and the Banks to record and otherwise treat
each payment under a Letter of Credit not immediately reimbursed by the
Borrower as a Borrowing comprised of Prime Rate Advances to the Borrower.

              (4)     Obligations Unconditional.  The obligations of the
Borrower under this Agreement in respect of each Letter of Credit shall be
unconditional and irrevocable, and shall be paid strictly in accordance with
the terms of this Agreement under all circumstances, notwithstanding the
following circumstances:

                      (1)      any lack of validity or enforceability of any
              Letter of Credit Documents;

                      (2)      any amendment or waiver of or any consent to
              departure from any Letter of Credit Documents;

                      (3)      the existence of any claim, set-off, defense or
              other right which the Borrower or any Bank or any other Person
              may have at any time against any beneficiary or transferee of
              such Letter of Credit (or any Persons for whom any such
              beneficiary or any such transferee may be acting), the respective
              Issuing Bank or any other Person or entity, whether in connection
              with this Agreement, the transactions contemplated in this
              Agreement or in any Letter of Credit Documents or any unrelated
              transaction;

                      (4)      any statement or any other document presented
              under such Letter of Credit proving to be forged, fraudulent,
              invalid or insufficient in any respect or any statement therein
              being untrue or inaccurate in any respect to the extent the
              respective Issuing Bank would not be liable therefor pursuant to
              the following paragraph (e);

                      (5)      payment by the respective Issuing Bank under
              such Letter of Credit against presentation of a draft or
              certificate which does not comply with the terms of such Letter
              of Credit; or

                      (6)      any other circumstance or happening whatsoever,
              whether or not similar to any of the foregoing;

provided, however, that nothing contained in this paragraph (d) shall be deemed
to constitute a waiver of any remedies of the Borrower in connection with the
Letters of Credit.





                                      -36-
<PAGE>   43

              (5)     Liability of Issuing Banks.  The Borrower assumes all
risks of the acts or omissions of any beneficiary or transferee of any Letter
of Credit with respect to its use of such Letter of Credit.  No Issuing Bank
nor any of its officers or directors shall be liable or responsible for:

                      (1)      the use which may be made of any Letter of
              Credit or any acts or omissions of any beneficiary or transferee
              in connection therewith;

                      (2)      the validity, sufficiency or genuineness of
              documents, or of any endorsement thereon, even if such documents
              should prove to be in any or all respects invalid, insufficient,
              fraudulent or forged;

                      (3)      payment by such Issuing Bank against
              presentation of documents which do not comply with the terms of a
              Letter of Credit, including failure of any documents to bear any
              reference or adequate reference to the relevant Letter of Credit;
              or

                      (4)      any other circumstances whatsoever in making or
              failing to make payment under any Letter of Credit (including
              such Issuing Bank's own negligence),

except that the Borrower shall have a claim against such Issuing Bank, and such
Issuing Bank shall be liable to, and shall promptly pay to, the Borrower, to
the extent of any direct, as opposed to consequential, damages suffered by the
Borrower which the Borrower proves were caused by (A) such Issuing Bank's
willful misconduct or gross negligence in determining whether documents
presented under a Letter of Credit comply with the terms of such Letter of
Credit or (B) such Issuing Bank's willful failure to make lawful payment under
any Letter of Credit after the presentation to it of a draft and certificate
strictly complying with the terms and conditions of such Letter of Credit.  In
furtherance and not in limitation of the foregoing, any Issuing Bank may accept
documents that appear on their face to be in order, without responsibility for
further investigation, regardless of any notice or information to the contrary.

     Section II.14    Determination of Borrowing Base.  The Borrowing Base
shall be determined by the Agent, as follows:

              (1)     Monthly.  On the 25th day of each calendar month the
Agent shall determine the Borrowing Base upon receipt of a Borrowing Base
Certificate dated as of the last day of the immediately preceding calendar
month.

              (2)     Acceptable Security Interest.  Each of the Eligible
Revenue Equipment, the Treadco Shares and the Eligible Receivables shall be
subject to an Acceptable Security Interest in favor of the Agent for the
benefit of the Banks until the Liens held by the Agent for the benefit of the
Banks upon the Collateral have been released pursuant to Section 2.17(f).

              (3)     Property Adjustments.  Following (i) any sale by the
Borrower or any Guarantor of any Property included in the Borrowing Base with a
sales value in excess of $25,000,000 individually or in the aggregate since the
most recent month end, (ii) any loss or casualty not covered by insurance
resulting in destruction of any Property included in the





                                      -37-
<PAGE>   44

Borrowing Base if the loss or casualty exceeds $25,000,000 individually or in
the aggregate since the most recent month end, and (iii) any permitted purchase
by the Borrower or any Guarantor of any Property which can be included in the
Borrowing Base with a purchase price in excess of $25,000,000 individually or
in the aggregate since the most recent month end (each of such events
hereinafter called an "Adjustment Event"), the Borrower shall (in the case of
(i) and (ii) above) or may (in the case of (iii) above) give the Agent notice
of such Adjustment Event within  five Business Days of the closing of such
Adjustment Event, and the Agent may in its sole reasonable discretion (in the
case of (i) and (ii) above) or shall (in the case of (iii) above) further
adjust the appropriate Borrowing Base components set forth in the most recent
month end Borrowing Base Certificate delivered by the Borrower to the Banks to
reflect the Adjustment Events occurring since the date of such Borrowing Base
Certificate.

              (4)     Notice of Borrowing Base Change.  Promptly following any
date the Borrowing Base is redetermined in accordance with the preceding
paragraphs, the Agent shall give notice to the Banks and the Borrower of the
new Borrowing Base.

     Section II.15    Bank Replacement.

              (1)     Right to Replace.  The Borrower shall have the right to
replace each Bank affected by a condition under Section 2.2(c)(iv), 2.9, or
2.12 for more than 90 days (each such affected Bank, an "Affected Bank") in
accordance with the procedures in this Section 2.15 and provided that no
reduction of the total Revolving Commitments occurs as a result thereof.

              (2)     First Right of Refusal; Replacement.

                      (1)      Upon the occurrence of any condition permitting
              the replacement of a Bank, each Bank which is not an Affected
              Bank shall have the right, but not the obligation, to elect to
              increase its respective Revolving Commitment by an amount not to
              exceed the amount of the Revolving Commitments of the Affected
              Banks, which election shall be made by written notice from each
              such Bank to the Agent and the Borrower given within 30 days
              after the date such condition occurs specifying the amount of
              such proposed increase in such Bank's Revolving Commitment.

                      (2)      If  the aggregate amount of the proposed
              increases in Revolving Commitments of all such Banks making such
              an election is in excess of the Revolving Commitments of the
              Affected Banks, (A) the Revolving Commitments of the Affected
              Banks shall be allocated pro rata among such Banks based on the
              respective amounts of the proposed increases to Revolving
              Commitments elected by each of such Banks, and (B) the respective
              Commitments of such Banks shall be increased by the respective
              amounts as so allocated so that after giving effect to such
              termination and increases the aggregate amount of the Revolving
              Commitments of the Banks will be the same as prior to such
              termination.

                      (3)      If the aggregate amount of the proposed
              increases to Revolving Commitments of all Banks making such an
              election equals the Revolving





                                      -38-
<PAGE>   45

              Commitments of the Affected Banks, the respective Revolving
              Commitments of such Banks shall be increased by the respective
              amounts of their proposed increases, so that after giving effect
              to such termination and increase the aggregate amount of the
              Revolving Commitments of all of the Banks will be the same as
              prior to such termination.

                      (4)      If the aggregate amount of the proposed
              increases to Revolving Commitments of all Banks making such an
              election is less than the Revolving Commitments of the Affected
              Banks, (A) the respective Revolving Commitments of such Banks
              shall be increased by the respective amounts of their proposed
              increases, and (B) the Borrower shall add additional Banks which
              are Eligible Assignees to this Agreement to replace such Affected
              Banks, which additional Banks would have aggregate Revolving
              Commitments no greater than those of the Affected Banks minus the
              amounts thereof assumed by the other Banks pursuant to such
              increases.

              (3)     Procedure.  Any assumptions of Revolving Commitments
pursuant to this Section 2.15 shall be (i) made by the purchasing Bank or
Eligible Assignee and the selling Bank entering into an Assignment and
Assumption and by following the procedures in Section 9.6 for adding a Bank.
In connection with the increase of the Revolving Commitments of any Bank
pursuant to the foregoing paragraph (b), each Bank with an increased Revolving
Commitment shall purchase from the Affected Banks at par such Bank's ratable
share of the outstanding Advances of the Affected Banks and assume such Bank's
ratable share of the Affected Banks' Letter of Credit Exposure.

     Section II.16    Sharing of Payments, Etc.  If any Bank shall obtain any
payment (whether voluntary, involuntary, through the exercise of any right of
set-off or otherwise) on account of its Advances or its share of Letter of
Credit Obligations in excess of its Pro Rata Share of payments on account of
the Advances or Letter of Credit Obligations obtained by all the Banks, such
Bank shall notify the Agent and forthwith purchase from the other Banks such
participations in the Advances made by them or Letter of Credit Obligations
held by them as shall be necessary to cause such purchasing Bank to share the
excess payment ratably in accordance with the requirements of this Agreement
with each of them; provided, however, that if all or any portion of such excess
payment is thereafter recovered from such purchasing Bank, such purchase from
each Bank shall be rescinded and such Bank shall repay to the purchasing Bank
the purchase price to the extent of such Bank's ratable share (according to the
proportion of (a) the amount of the participation sold by such Bank to the
purchasing Bank as a result of such excess payment to (b) the total amount of
such excess payment) of such recovery, together with an amount equal to such
Bank's ratable share (according to the proportion of (i) the amount of such
Bank's required repayment to the purchasing Bank to (ii) the total amount of
all such required repayments to the purchasing Bank) of any interest or other
amount paid or payable by the purchasing Bank in respect of the total amount so
recovered.  The Borrower agrees that any Bank so purchasing a participation
from another Bank pursuant to this Section 2.16 may, to the fullest extent
permitted by law, unless and until rescinded as provided above, exercise all
its rights of payment (including the right of set-off) with respect to such
participation as fully as if such Bank were the direct creditor of the Borrower
in the amount of such participation.





                                      -39-
<PAGE>   46

     Section II.17    Collateral.

              (1)     Creation and Perfection of Liens.  Prior to the
termination of the Revolving Commitments and the repayment in full of the
Obligations, a perfected Lien shall exist on all Collateral in favor of the
Agent for the benefit of the Banks to secure the Obligations in accordance with
the terms of the Security Agreements, except that to the extent any Lien
previously granted to the Agent for the benefit of the Banks on Revenue
Equipment is unperfected as of the Effective Date, the Borrower shall cause
such Liens to be perfected as promptly as practicable.

              (2)     Further Assurances.  The Borrower agrees to promptly, on
demand, execute and deliver, and cause the Guarantors to execute and deliver,
at the Borrower's expense, such security agreements, pledge agreements,
assignments, mortgages, financing statements, stock powers, and other
collateral documentation, and take such other actions deemed by the Agent and
its counsel to be necessary in order to effect the foregoing.

              (3)     Appraisals.  The Borrower agrees to obtain, at its own
expense and as promptly as practicable, such other appraisals as any
Governmental Authority may require the Agent to obtain from time to time to
satisfy any applicable Legal Requirement.

              (4)     Certificates of Title.  The Borrower agrees to hold, and
to cause each Guarantor to hold, the certificates of title relating to titled
Revenue Equipment of the Borrower or any Guarantor only at the offices listed
on Schedule 2.17 attached hereto and in the custody of the Custodians described
in the Borrower Security Agreement and the Guarantors Security Agreement.

              (5)     Authorized Sales of Property and Release of Liens by
Agent.  The Banks hereby acknowledge and agree that the Borrower and any
Guarantor may from time to time elect to make an Authorized Sale of Property.
In connection with any such Authorized Sale of Property, each of the Banks
hereby agrees that the Agent is authorized to release, or to provide for the
release, of any Lien held by the Agent for the benefit of the Banks upon the
Property to be sold without further notice to, or consent from, the Banks;
provided that on the date of the requested release of Lien and on the date of
the sale of any such Property, no Default has occurred which is continuing (it
being agreed by the Borrower that each request for a release of Lien shall
constitute a representation and warranty from the Borrower in favor of the
Banks, effective on the date of  such release of Lien and on the date of the
sale of such Property, that no Default has occurred and is continuing on such
date or would result from the sale of such Property).

              (6)     Release of Collateral.  If at any time, (a) either (i)
the Borrower's Senior Unsecured Debt is rated BBB- or higher by S&P and Baa3 or
higher by Moody's, or (ii) the Borrower's Leverage Ratio is 1.90 to 1.00 or
less for a period of three consecutive fiscal quarters, and (b) no Default has
occurred and is continuing, then the Agent and the Banks agree that all Liens
and security interest they may have on all Collateral shall terminate, and each
of the Banks





                                      -40-
<PAGE>   47

hereby agrees that the Agent is authorized to release, or to provide for the
release, of any Lien held by the Agent for the benefit of the Banks upon the
Collateral without further notice to, or consent from the Banks.  The Agent
agrees to promptly notify the Banks upon the release of the Liens held by the
Agent for the benefit of the Banks upon all of the Collateral under this
Section 2.17(f).

                                  ARTICLE III

                             CONDITIONS OF LENDING

     Section III.1    Conditions Precedent to Effectiveness of this Agreement.
This Agreement shall become effective upon the following conditions precedent
having been satisfied:

              (1)     Documentation.  The Agent shall have received
counterparts of this Agreement executed by the Borrower and the Banks, and the
following duly executed by all the parties thereto, in form and substance
satisfactory to the Agent, and in sufficient copies for each Bank:

                      (1)      the Guaranty, the Borrower Security Agreement,
              the Guarantors Security Agreement, and any related Uniform
              Commercial Code financing statements;

                      (2)      a certificate from the Chief Executive Officer,
              President or Chief Financial Officer of the Borrower dated as of
              the Effective Date stating that as of the Effective Date (A) all
              representations and warranties of the Borrower set forth in this
              Agreement and the Security Agreements are true and correct in all
              material respects; (B) no Default has occurred and is continuing;
              and (C) the conditions in this Section 3.1 have been met;

                      (3)      a certificate of the Secretary or an Assistant
              Secretary of the Borrower and each Guarantor dated as of the date
              of this Agreement certifying as of the date of this Agreement (A)
              the names and true signatures of officers of the Borrower and
              such Guarantor authorized to sign the Credit Documents to which
              such Person is a party, (B) resolutions of the Board of Directors
              of such Person with respect to the transactions herein
              contemplated, and (C) copies of the articles or certificate of
              incorporation and bylaws of such Person;

                      (4)      a favorable opinion of Richard F. Cooper,
              General Counsel to the Borrower and Guarantors, dated as of the
              Effective Date and in substantially the form of Exhibit H;

                      (5)      a favorable opinion of Bracewell & Patterson,
              L.L.P., counsel to the Agent, dated as of the Effective Date and
              in substantially in the form of the attached Exhibit I;





                                      -41-
<PAGE>   48

                      (6)      the audited Consolidated and unaudited
              consolidating balance sheet of the Borrower and its Subsidiaries
              as at December 31, 1997, and the related Consolidated and
              consolidating statements of operations, shareholders' equity and
              cash flows, of the Borrower and its Subsidiaries for the fiscal
              year then ended, duly certified by the Chief Financial Officer or
              Treasurer of the Borrower;

                      (7)      a Borrowing Base Certificate dated as of April
              30, 1998 duly completed and executed by the Chief Financial
              Officer or Treasurer of the Borrower; and

                      (8)      such other documents, governmental certificates,
              agreements, lien searches as the Agent may reasonably request.

              (2)     Representations and Warranties.  The representations and
warranties contained in Article IV hereof and Section 7 of the Guaranty and in
each Security Agreement shall be true and correct in all material respects.

              (3)     Certain Payments. The Borrower shall have paid the fees
required to be paid as of the Effective Date pursuant to the Agent's Fee
Letter.

              (4)     Termination of Existing Credit Agreement.  The Agent and
the Banks shall have received sufficient evidence indicating that
contemporaneously with the making of the initial Advances, the obligations of
the Borrower under the Existing Credit Agreement will be repaid with the
proceeds of such Advances and thereafter all obligations of the Borrower and
the lenders under the Existing Credit Agreement shall be terminated (including,
without limitation, any obligations of any Subsidiary of the Borrower in
respect of guaranties, security agreements executed in connection with such
Existing Credit Agreement but excluding any obligations which expressly survive
the repayment of the amounts owing under the Existing Credit Agreement).

     Section III.2    Conditions Precedent for each Borrowing or Letter of
Credit.  The obligation of each Bank to fund an Advance on the occasion of each
Borrowing (other than the Conversion or continuation of any existing Borrowing
and other than a Mandatory Revolving Borrowing) and of any Issuing Bank to
issue or increase or extend any Letter of Credit shall be subject to the
further conditions precedent that on the date of such Borrowing or the issuance
or increase or extension of such Letter of Credit the following statements
shall be true (and each of the giving of the applicable Notice of Borrowing and
the acceptance by the Borrower of the proceeds of such Borrowing or the
issuance or increase or extension of such Letter of Credit shall constitute a
representation and warranty by the Borrower that on the date of such Borrowing
or the issuance or increase or extension of such Letter of Credit such
statements are true):

              (1)     the representations and warranties contained in Article
IV hereof and Section 7 of the Guaranty and in each Security Agreement are
correct in all material respects on and as of the date of such Borrowing or the
issuance or increase or extension of such Letter of





                                      -42-
<PAGE>   49

Credit, before and after giving effect to such Borrowing or to the issuance or
increase or extension of such Letter of Credit and to the application of the
proceeds from such Borrowing, as though made on and as of such date and

              (2)     no Default has occurred and is continuing or would result
from such Borrowing or from the application of the proceeds therefrom.

                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

     The Borrower represents and warrants as follows:

     Section IV.1     Corporate Existence; Subsidiaries.  The Borrower is a
corporation duly organized, validly existing, and in good standing under the
laws of Delaware and in good standing and qualified to do business in each
jurisdiction where its ownership or lease of property or conduct of its
business requires such qualification and where a failure to be qualified could
reasonably be expected to cause a Material Adverse Change.  Each Subsidiary of
the Borrower is a corporation duly organized, validly existing, and in good
standing under the laws of its jurisdiction of incorporation and in good
standing and qualified to do business in each jurisdiction where its ownership
or lease of property or conduct of its business requires such qualification and
where a failure to be qualified could reasonably be expected to cause a
Material Adverse Change.  The Borrower has no Subsidiaries on the date of this
Agreement other than the Subsidiaries listed on the attached Schedule 4.1, and
Schedule 4.1 lists the jurisdiction of incorporation and the address of the
principal office of each such Subsidiary existing on the date of this
Agreement.

     Section IV.2     Corporate Power.  The execution, delivery, and
performance by the Borrower and each Guarantor of the Credit Documents to which
it is a party and the consummation of the transactions contemplated hereby and
thereby (a) are within the Borrower's and the Guarantors' corporate powers, (b)
have been duly authorized by all necessary corporate action, (c) do not
contravene (i) the Borrower's or any Guarantor's certificate or articles, as
the case may be, of incorporation or by-laws or (ii) any law or any contractual
restriction binding on or affecting the Borrower or any Guarantor, the
contravention of which could reasonably be expected to cause a Material Adverse
Change, and (d) will not result in or require the creation or imposition of any
Lien prohibited by this Agreement.  At the time of each Borrowing, such
Borrowing and the use of the proceeds of such Borrowing will be within the
Borrower's corporate powers, will have been duly authorized by all necessary
corporate action, (A) will not contravene (1) the Borrower's certificate of
incorporation or by-laws or (2) any law or any contractual restriction binding
on or affecting the Borrower, the contravention of which could reasonably be
expected to cause a Material Adverse Change, and (B) will not result in or
require the creation or imposition of any Lien prohibited by this Agreement.





                                      -43-
<PAGE>   50

     Section IV.3     Authorization and Approvals.  No authorization or
approval or other action by, and no notice to or filing with, any Governmental
Authority is required for the due execution, delivery and performance by the
Borrower or any Guarantor of the Credit Documents to which it is a party or the
consummation of the transactions contemplated thereby.  At the time of each
Borrowing, no authorization or approval or other action by, and no notice to or
filing with, any Governmental Authority will be required for such Borrowing or
the use of the proceeds of such Borrowing.

     Section IV.4     Enforceable Obligations.  This Agreement, the Notes, and
the other Credit Documents to which the Borrower is a party have been duly
executed and delivered by the Borrower and the Guaranty and the Guarantors
Security Agreement and the other Credit Documents to which each Guarantor is a
party have been duly executed and delivered by such Guarantor.  Each Credit
Document is the legal, valid, and binding obligation of the Borrower and each
Guarantor which is a party to it enforceable against the Borrower and each such
Guarantor in accordance with its terms, except as such enforceability may be
limited by any applicable bankruptcy, insolvency, reorganization, moratorium,
or similar law affecting creditors' rights generally and by general principles
of equity (whether considered in proceeding at law or in equity).

     Section IV.5     Financial Statements.

              (1)      The audited Consolidated and unaudited consolidating
balance sheet of the Borrower and its Subsidiaries as at December 31, 1997, and
the related Consolidated and consolidating statements of operations,
shareholders' equity and cash flows, of the Borrower and its Subsidiaries for
the fiscal year then ended, copies of which have been furnished to each Bank
duly certified by the Chief Financial Officer or Treasurer of the Borrower,
fairly present the financial condition of the Borrower and its Subsidiaries as
at such date and the results of the operations of the Borrower and its
Subsidiaries for the year ended on such date, and such balance sheet and
statements were prepared in accordance with GAAP.

              (2)     No Material Adverse Change has occurred.

     Section IV.6     True and Complete Disclosure.  No representation,
warranty, or other statement made by the Borrower (or on behalf of the
Borrower) in this Agreement or any other Credit Document contains any untrue
statement of a material fact or omits to state any material fact necessary to
make the statements contained therein not misleading in light of the
circumstances in which they were made as of the date of this Agreement.  There
is no fact known to any Responsible Officer of the Borrower on the date of this
Agreement and on the Effective Date that has not been disclosed to the Agent
which they reasonably expect to cause a Material Adverse Change.  All
projections, estimates, and pro forma financial information furnished by the
Borrower or on behalf of the Borrower were prepared on the basis of
assumptions, data, information, tests, or conditions believed to be reasonable
at the time such projections, estimates, and pro forma financial information
were furnished.

     Section IV.7     Litigation.  Except as set forth in the attached Schedule
4.7, there is no pending or, to the best knowledge of the Borrower, threatened
action or proceeding affecting the





                                      -44-
<PAGE>   51

Borrower or any of its Subsidiaries before any court, Governmental Authority or
arbitrator, which could reasonably be expected to cause a Material Adverse
Change or which purports to affect the legality, validity, binding effect or
enforceability of this Agreement, any Note, or any other Credit Document.

     Section IV.8     Use of Proceeds.

              (1)     Revolving Advances.  The proceeds of the Revolving
Advances have been, and will be used by the Borrower to refinance existing
indebtedness under the Existing Credit Agreement and for general corporate
purposes of the Borrower and its Subsidiaries.

              (2)     Swingline Line Advances.  The proceeds of the Swingline
Line Advances will be used by the Borrower for general corporate purposes of
the Borrower and its Subsidiaries.

              (3)     Regulations.  No proceeds of Advances will be used to
purchase or carry any margin stock in violation of Regulations G, T, U or X of
the Federal Reserve Board, as the same is from time to time in effect, and all
official rulings and interpretations thereunder or thereof.  The Borrower is
not engaged in the business of extending credit for the purpose of purchasing
or carrying margin stock (within the meaning of Regulation U of the Federal
Reserve Board).

     Section IV.9     Investment Company Act.  Neither the Borrower nor any of
its Subsidiaries is an "investment company" or a company "controlled" by an
"investment company" within the meaning of the Investment Company Act of 1940,
as amended.

     Section IV.10    Taxes.  Except as set forth on Schedule 4.10, all
federal, state, local and foreign tax returns, reports and statements required
to be filed (after giving effect to any extension granted in the time for
filing) by the Borrower, its Subsidiaries or any member of the Controlled Group
(hereafter collectively called the "Tax Group") have been filed with the
appropriate governmental agencies in all jurisdictions in which such returns,
reports and statements are required to be filed, and where the failure to file
could reasonably be expected to cause a Material Adverse Change, except where
contested in good faith and by appropriate proceedings; and all material taxes
and other material impositions due and payable have been timely paid prior to
the date on which any material fine, penalty, interest, late charge or loss may
be added thereto for non-payment thereof except where contested in good faith
and by appropriate proceedings.  Neither the Borrower nor any member of the Tax
Group has given, or been requested to give, a waiver of the statute of
limitations relating to the payment of any federal, state, local or foreign
taxes or other impositions.  None of the property owned by the Borrower or any
other member of the Tax Group is property which the Borrower or any member of
the Tax Group is required to treat as being owned by any other Person pursuant
to the provisions of Section 168(f)(8) of the Code.  Proper and accurate
amounts have been withheld by the Borrower and all other members of the Tax
Group from their employees for all periods to comply in all material respects
with the tax, social security and unemployment withholding provisions of
applicable federal, state, local and foreign law.  Timely payment of all
material sales and use taxes required by applicable law have been made by the
Borrower and all other members of the Tax Group, the failure to timely pay of
which could reasonably be expected to





                                      -45-
<PAGE>   52

cause a Material Adverse Change.  The amounts shown on all tax returns to be
due and payable have been paid in full or adequate provision therefor is
included on the books of the appropriate member of the Tax Group.

     Section IV.11    Pension Plans.  All Plans are in compliance in all
material respects with all applicable provisions of ERISA.  No Termination
Event has occurred with respect to any Plan, and each Plan has complied with
and been administered in all material respects in accordance with applicable
provisions of ERISA and the Code.  No "accumulated funding deficiency" (as
defined in Section 302 of ERISA) has occurred and there has been no excise tax
imposed under Section 4971 of the Code.  To the knowledge of any Responsible
Officer of the Borrower, no Reportable Event has occurred with respect to any
Multiemployer Plan, and each Multiemployer Plan has complied with and been
administered in all material respects with applicable provisions of ERISA and
the Code.  To the knowledge of any Responsible Officer of the Borrower, neither
the Borrower nor any member of the Controlled Group has had a complete or
partial withdrawal from any Multiemployer Plan for which there is any material
withdrawal liability.  As of the most recent valuation date applicable thereto,
neither the Borrower nor any member of the Controlled Group has received notice
that any Multiemployer Plan is insolvent or in reorganization.

     Section IV.12    Condition of Property; Casualties.  The material
Properties used or to be used in the continuing operations of the Borrower and
each of its Subsidiaries, taken as a whole, are and will continue to be in good
repair, working order and condition, normal wear and tear excepted.  Since
December 31, 1997, neither the business nor the material Properties of the
Borrower and its Subsidiaries, taken as a whole, has been materially and
adversely affected as a result of any fire, explosion, earthquake, flood,
drought, windstorm, accident, strike or other labor disturbance, embargo,
requisition or taking of property or cancellation of contracts, permits or
concessions by a Governmental Authority, riot, activities of armed forces or
acts of God or of any public enemy.

     Section IV.13    Insurance.  The Borrower and each of its Subsidiaries
carry insurance with reputable insurers in respect of such of their respective
Properties, in such amounts and against such risks as is customarily maintained
by other Persons of similar size engaged in similar businesses or, self-insure
to the extent that is customary for Persons of similar size engaged in similar
businesses.

     Section IV.14    No Burdensome Restrictions; No Defaults.

              (1)     Neither the Borrower nor any of its Subsidiaries is a
party to any indenture, loan or credit agreement or any lease or other
agreement or instrument or subject to any charter or corporate restriction or
provision of applicable law or governmental regulation which could reasonably
be expected to cause a Material Adverse Change.  The Borrower and the
Guarantors are not in default under or with respect to any contract, agreement,
lease or other instrument to which the Borrower or any Guarantor is a party and
which could reasonably be expected to cause a Material Adverse Change.  Neither
the Borrower nor any Guarantor has received any notice of default under any
material contract, agreement, lease or other instrument to which the Borrower
or such Guarantor is a party which is continuing and which, if not cured, could
reasonably be expected to cause a Material Adverse Change.





                                      -46-
<PAGE>   53

              (2)     No Default has occurred and is continuing.

     Section IV.15    Environmental Condition.

              (1)     The Borrower and its Subsidiaries, taken as a whole, (i)
have obtained all Environmental Permits necessary for the ownership and
operation of their respective material Properties and the conduct of their
respective businesses; (ii) have been and are in compliance with all terms and
conditions of such Environmental Permits and with all other material
requirements of applicable Environmental Laws of which the failure to comply
could reasonably be expected to cause a Material Adverse Change; (iii) have not
received notice of any violation or alleged violation of any Environmental Law
or Environmental Permit, which violation could reasonably be expected to cause
a Material Adverse Change; and (iv) are not subject to any actual or contingent
material Environmental Claim, which Environmental Claim could reasonably be
expected to cause a Material Adverse Change.

              (2)     None of the present or previously owned or operated
Property of the Borrower or of any of its present or former Subsidiaries,
wherever located, (i) has been placed on or proposed to be placed on the
National Priorities List, the Comprehensive Environmental Response Compensation
Liability Information System list, or their state or local analogs, or have
been otherwise investigated, designated, listed, or identified as a potential
site for removal, remediation, cleanup, closure, restoration, reclamation, or
other response activity under any Environmental Laws which could reasonably be
expected to cause a Material Adverse Change; (ii) is subject to a Lien, arising
under or in connection with any Environmental Laws, that attaches to any
revenues or to any Property owned or operated by the Borrower or any of its
Subsidiaries, wherever located, which Lien could reasonably be expected to
cause a Material Adverse Change; or (iii) has been the site of any Release of
Hazardous Substances or Hazardous Wastes from present or past operations which
has caused at the site or at any third-party site any condition that has
resulted in or could reasonably be expected to result in the need for Response
that could cause a Material Adverse Change.

              (3)     Without limiting the foregoing, the present and, to the
best knowledge of any Responsible Officer of the Borrower, future liability, if
any, of the Borrower and its Subsidiaries, taken as a whole, which could
reasonably be expected to arise in connection with requirements under
Environmental Laws will not result in a Material Adverse Change.

     Section IV.16    Permits, Licenses, etc.  The Borrower and its
Subsidiaries possess all certificates of public convenience, authorizations,
permits, licenses, patents, patent rights or licenses, trademarks, trademark
rights, trade names rights and copyrights which are material to the conduct of
its business.  The Borrower and its Subsidiaries manage and operate their
business in accordance with all applicable Legal Requirements which the failure
to so manage or operate could reasonably be expected to cause a Material
Adverse Change.





                                      -47-
<PAGE>   54

     Section IV.17    Existing Mortgage Debt.  All outstanding Indebtedness
secured by a Lien on real property of the Borrower or any Guarantor existing as
of the Effective Date is described on Schedule 6.1, and the amount of such
Indebtedness shown on such Schedule is the aggregate outstanding amount as of
the Effective Date.  No "default" or "event of default", however defined, has
occurred and is continuing under any documentation evidencing such Indebtedness
or the Lien securing such Indebtedness.

     Section IV.18    Year 2000.  (a) The Borrower has (i) begun analyzing the
operations of the Borrower and its Subsidiaries and Affiliates that could be
adversely affected by the failure to become Year 2000 Compliant and (ii)
developed a plan for becoming Year 2000 Compliant in a timely manner, the
implementation of which is on schedule in all material respects and (iii) as of
the Effective Date, implemented that plan in accordance with that schedule in
all material respects.  The Borrower reasonably believes that it will become
Year 2000 compliant for its operations and those of its Subsidiaries and
Affiliates on a timely basis except to the extent that a failure to do so could
not reasonably be expected to cause a Material Adverse Change.

     (b)      The Borrower reasonably believes any suppliers and vendors that
are material to the operations of the Borrower or its Subsidiaries and
Affiliates will be Year 2000 Compliant for their own computer applications
except to the extent that a failure to do so could not reasonably be expected
to cause a Material Adverse Change.


                                   ARTICLE V

                             AFFIRMATIVE COVENANTS

     So long as any Note or any amount under any Credit Document shall remain
unpaid, any Letter of Credit shall remain outstanding, or any Bank shall have
any Revolving Commitment hereunder, the Borrower agrees, unless the Majority
Banks shall otherwise consent in writing, to comply with the following
covenants.

     Section V.1      Compliance with Laws, Etc.  The Borrower will comply, and
cause each of its Subsidiaries to comply, with all Legal Requirements of which
the failure to comply could reasonably be expected to cause a Material Adverse
Change; provided, however, that this Section 5.1 shall not prevent the
Borrower, or any of its Subsidiaries from, in good faith and with reasonable
diligence, contesting the validity or application of any such laws or
regulations by appropriate legal proceedings.

     Section V.2      Insurance.  The Borrower will maintain, and cause each of
its Subsidiaries to maintain, insurance with responsible and reputable
insurance companies or associations in such amounts and covering such risks as
are usually carried by companies engaged in similar businesses and owning
similar properties in the same general areas in which the Borrower or such
Subsidiary operates, provided that the Borrower or such Subsidiary may
self-insure to the extent and in the manner normal for similarly situated
companies of like size, type and financial condition that are part of a group
of companies under common control.  All policies shall





                                      -48-
<PAGE>   55

expressly protect or recognize the Agent's interest as required by the Agent.
Upon request the Borrower shall deliver certificates evidencing such insurance
and copies of the underlying policies as they are available.

     Section V.3      Preservation of Corporate Existence, Etc.  The Borrower
will preserve and maintain, and cause each of the Guarantors to preserve and
maintain, its corporate existence, rights, franchises and privileges in the
jurisdiction of its incorporation, and qualify and remain qualified, and cause
each such Guarantor to qualify and remain qualified, as a foreign corporation
in each jurisdiction in which qualification is necessary or desirable in view
of its business and operations or the ownership of its properties, and, in each
case, where failure to qualify or preserve and maintain its rights and
franchises could reasonably be expected to cause a Material Adverse Change;
provided, however, that nothing contained in this Section 5.3 shall prevent any
transaction permitted by Sections 6.4 or 6.9.

     Section V.4      Payment of Taxes, Etc.  The Borrower will pay and
discharge, and cause each of its Subsidiaries to pay and discharge, before the
same shall become delinquent and which the failure to timely pay or discharge
could reasonably be expected to cause a Material Adverse Change, (a) all taxes,
assessments and governmental charges or levies imposed upon it or upon its
income or profits or Property that are material in amount, prior to the date on
which penalties attach thereto and (b) all lawful claims that are material in
amount which, if unpaid, might by law become a Lien upon its Property;
provided, however, that neither the Borrower nor any such Subsidiary shall be
required to pay or discharge any such tax, assessment, charge, levy, or claim
which is being contested in good faith and by appropriate proceedings, and
(except with respect to the claim described on Schedule 4.10) with respect to
which reserves in conformity with GAAP have been provided.

     Section V.5      Visitation Rights.  At any reasonable time and from time
to time and so long as any visit or inspection will not unreasonably interfere
with the Borrower's or any of its Subsidiaries operations, upon reasonable
notice, the Borrower will, and will cause its Subsidiaries to, permit the Agent
and any Bank or any of its agents or representatives thereof, to examine and
make copies of and abstracts from the records and books of account of, and
visit and inspect at its reasonable discretion the properties of, the Borrower
and any such Subsidiary, to discuss the affairs, finances and accounts of the
Borrower and any such Subsidiary with any of their respective officers or
directors.

     Section V.6      Reporting Requirements.  The Borrower will furnish to the
Agent and each Bank:

              (1)     Quarterly Financials.  As soon as available and in any
event not later than 45 days after the end of each of the first three quarters
of each fiscal year of the Borrower and not later than 60 days after the end of
the fourth quarter of each fiscal year of the Borrower, the unaudited
Consolidated and consolidating balance sheets of Borrower and its Subsidiaries
as of the end of such quarter and the related unaudited statements of income,
shareholders' equity and cash flows of the Borrower and its Subsidiaries for
the period commencing at the end of the previous year and ending with the end
of such quarter, and the corresponding figures as at the end of, and for, the
corresponding period in the preceding fiscal year, all in reasonable detail and





                                      -49-
<PAGE>   56

duly certified with respect to such statements (subject to year-end audit
adjustments) by an authorized financial officer of the Borrower as having been
prepared in accordance with GAAP, together with a Compliance Certificate duly
executed by a Responsible Officer;

              (2)     Annual Financials.  As soon as available and in any event
not later than 90 days after the end of each fiscal year of the Borrower, a
copy of the annual audit report for such year for the Borrower and its
Subsidiaries, including therein audited Consolidated balance sheets of the
Borrower and its Consolidated Subsidiaries as of the end of such fiscal year
and the related Consolidated statements of income, shareholders' equity and
cash flows of the Borrower and its Subsidiaries for such fiscal year, and the
corresponding figures as at the end of, and for, the preceding fiscal year, in
each case certified by Ernst & Young L.L.P. or other independent certified
public accountants of recognized standing acceptable to the Agent and
including, if requested by the Agent, any management letters delivered by such
accountants to the Borrower in connection with such audit together with a
certificate of such accounting firm to the Banks stating that, in the course of
the regular audit of the business of the Borrower and its Subsidiaries, which
audit was conducted by such accounting firm in accordance with generally
accepted auditing standards, such accounting firm has obtained no knowledge
that a Default has occurred and is continuing, or if, in the opinion of such
accounting firm, a Default has occurred and is continuing, a statement as to
the nature thereof, together with a Compliance Certificate;

              (3)     Annual Projections.  As soon as available and in any
event not later than March 31st of each calendar year, the Consolidated annual
projections of the Borrower and its Subsidiaries for such year in reasonable
detail and duly certified by an authorized financial officer of the Borrower as
the projections presented or to be presented to the Borrower's Board of
Directors for their review;

              (4)     Securities Law Filings.  Promptly and in any event within
15 days after the sending or filing thereof, copies of all proxy material,
reports and other information which the Borrower or any of its Subsidiaries
sends to or files with the United States Securities and Exchange Commission or
sends to any shareholder of the Borrower or of any of its Subsidiaries;

              (5)     Defaults.  As soon as possible and in any event within
five days after the occurrence of each Default known to a Responsible Officer
of the Borrower or any of its Subsidiaries, a statement of an authorized
financial officer of the Borrower setting forth the details of such Default and
the actions which the Borrower has taken and proposes to take with respect
thereto;

              (6)     ERISA Notices.  Except as to any matter which could not
reasonably be expected to cause a Material Adverse Change, as soon as possible
and in any event (i) within 30 days after the  Borrower or any of its
Subsidiaries knows or has reason to know that any Termination Event described
in clause (a) of the definition of Termination Event with respect to any Plan
has occurred, (ii) within 10 days after the Borrower or any of its Subsidiaries
knows or has reason to know that any other Termination Event with respect to
any Plan has occurred, a statement of the Chief Financial Officer of the
Borrower describing such Termination Event and the action, if any, which the
Borrower or such Subsidiary proposes to take with respect thereto; (iii) within
10 days after receipt thereof by the Borrower or any of its Subsidiaries from
the





                                      -50-
<PAGE>   57

PBGC, copies of each notice received by the Borrower or any such Subsidiary of
the PBGC's intention to terminate any Plan or to have a trustee appointed to
administer any Plan; and (iv) within 10 days after receipt thereof by the
Borrower or any of its Subsidiaries from a Multiemployer Plan sponsor, a copy
of each notice received by the Borrower or any of its Subsidiaries concerning
the imposition or amount of withdrawal liability pursuant to Section 4202 of
ERISA;

              (7)     Environmental Notices.  Promptly upon the knowledge of
any Responsible Officer of the Borrower of receipt thereof by the Borrower or
any of its Subsidiaries, a copy of any form of notice, summons or citation
received from the United States Environmental Protection Agency, or any other
Governmental Authority directly engaged in protection of the Environment,
concerning (i) material violations or alleged violations of Environmental Laws,
which seeks to impose liability therefor and which, based upon information
reasonably available to the Borrower at the time or after such violation, could
reasonably be expected to cause a Material Adverse Change, (ii) any action or
omission on the part of the Borrower or any of its present or former
Subsidiaries in connection with Hazardous Waste or Hazardous Substances which,
based upon information reasonably available to the Borrower at the time of such
receipt, could reasonably be expected to cause a Material Adverse Change, (iii)
any notice of potential responsibility under CERCLA which could reasonably be
expected to cause a Material Adverse Change, or (iv) concerning the filing of a
Lien other than a Permitted Lien upon, against or in connection with the
Borrower, its present or former Subsidiaries, or any of their leased or owned
Property, wherever located;

              (8)     Other Governmental Notices or Actions.  Promptly and in
any event within five Business Days after receipt thereof by the Borrower or
any of its Subsidiaries, and the knowledge of such receipt by a Responsible
Officer of the Borrower or any inside counsel of the Borrower, (i) a copy of
any notice, summons, citation, or proceeding seeking to adversely modify in any
material respect, revoke, or suspend any license, permit, or other
authorization from the United States Department of Transportation, or any other
Governmental Authority, which action could reasonably be expected to cause a
Material Adverse Change, and (ii) any revocation or involuntary termination of
any license, permit or other authorization from the United States Department of
Transportation, or any other Governmental Authority, which revocation or
termination could reasonably be expected to cause a Material Adverse Change;

              (9)     Borrowing Base Certificate.  On or prior to the 25th day
of each calendar month, a completed Borrowing Base Certificate setting forth
the components of the Borrowing Base as of the last day of the immediately
preceding calendar month;

              (10)    Other Notices.  Promptly following any merger or
dissolution of any Subsidiary of the Borrower which is permitted hereunder,
notice thereof;

              (11)    Material Litigation.  As soon as possible and in any
event within five days of any Responsible Officer of the Borrower or any of its
Subsidiaries having knowledge thereof, notice any litigation, claim or any
other event which could reasonably be expected to cause a Material Adverse
Change;





                                      -51-
<PAGE>   58

              (12)    Year 2000.  The Borrower will promptly notify the Agent
in the event the Borrower determines that any computer application which is
material to the operations of the Borrower, its Subsidiaries or any of its
material vendors or suppliers will not be fully Year 2000 compliant on a timely
basis, except to the extent that such failure could not be reasonably be
expected to cause a Material Adverse Change; and

              (13)    Other Information.  Such other information respecting the
business or Properties, or the condition or operations, financial or otherwise,
of the Borrower, or any of its Subsidiaries, as any Bank through the Agent may
from time to time reasonably request.

     Section V.7      Maintenance of Property.  The Borrower will, and will
cause each of its Subsidiaries to, (a) maintain their material owned, leased,
or operated property, equipment, buildings and fixtures in substantially the
same or better condition and repair as the condition and repair as of December
31, 1997, normal wear and tear excepted and (b) not knowingly or willfully
permit the commission of waste or other injury, or the occurrence of pollution,
contamination or any other condition in, on or about the owned or operated
property involving the Environment that could reasonably be expected to cause a
Material Adverse Change.

     Section V.8      Ownership of ABF.  The Borrower will maintain its
ownership of 100% of the common stock of ABF Freight System, Inc., a Delaware
corporation and wholly-owned Subsidiary of the Borrower.


                                   ARTICLE VI

                               NEGATIVE COVENANTS

     So long as any Note or any amount under any Credit Document shall remain
unpaid, any Letter of Credit shall remain outstanding, or any Bank shall have
any Revolving Commitment, the Borrower agrees, unless the Majority Banks
otherwise consent in writing, to comply with the following covenants.

     Section VI.1     Liens, Etc.  The Borrower will not create, assume, incur
or suffer to exist, or permit any of its Subsidiaries to create, assume, incur,
or suffer to exist, any Lien on or in respect of any of its Property whether
now owned or hereafter acquired, or assign any right to receive income, except
that the Borrower and its Subsidiaries may create, incur, assume or suffer to
exist Liens:

              (1)     securing the Obligations;

              (2)     for taxes, assessments or governmental charges or levies
on Property of the Borrower or any Guarantor to the extent not required to be
paid pursuant to Sections 5.1 and 5.4;





                                      -52-
<PAGE>   59

              (3)     imposed by law, such as landlords', carriers',
warehousemen's and mechanics' liens and other similar Liens arising in the
ordinary course of business securing obligations which are not overdue for a
period of more than 15 days or which are being contested in good faith and by
appropriate proceedings if adequate reserves with respect thereto are
maintained on the books of the Borrower and its Subsidiaries in accordance with
GAAP;

              (4)     arising in the ordinary course of business out of pledges
or deposits under workers' compensation laws, unemployment insurance, old age
pensions or other social security or retirement benefits, bonds or letters of
credit, or similar legislation or to secure public or statutory obligations of
the Borrower or any of its Subsidiaries;

              (5)     existing on Property acquired by the Borrower or any of
its Subsidiaries in the ordinary course of business prior to the Borrower's or
such Subsidiaries' acquisition of such Property;

              (6)     securing Indebtedness incurred after the Effective Date
(other than secured Indebtedness permitted by the following paragraphs (g),
(j), (k), and (l) below) in an amount not to exceed $5,000,000 in the aggregate
at any time; provided that the fair market value of the collateral securing any
such Indebtedness may exceed the outstanding principal amount of such
Indebtedness only to the extent such excess is within customary commercial bank
lending and collateralization requirements;

              (7)     securing Indebtedness existing on the Effective Date and
listed on the attached Schedule 6.1; provided that the Indebtedness secured by
such Liens shall not be renewed, refinanced or extended if the amount of such
Indebtedness so renewed, refinanced or extended is greater than the outstanding
amount of such Indebtedness on the date of this Agreement;

              (8)     constituting easements, rights-of-way, restrictions and
other similar encumbrances incurred in the ordinary course of business and
encumbrances consisting of zoning restrictions, easements, licenses,
restrictions on the use of Property or minor imperfections in title thereto
which, in the aggregate, are not material in amount, and which do not in any
case materially detract from the value of the Property subject thereto or
materially interfere with the ordinary conduct of the business of the Borrower
or any of its Subsidiaries;

              (9)     arising from litigation and which are effectively stayed
from execution and would not otherwise cause a Default to occur;

              (10)    on real property to secure the purchase price of such
Property or improvements thereon;

              (11)    on leased real and personal property to secure solely the
lease obligations associated with such property;

              (12)    on certain Receivables of any Intermodal Subsidiary in
favor of any railroad company which secures the obligations of such Intermodal
Subsidiary to such railroad company





                                      -53-
<PAGE>   60

in connection with rail shipments with such railroad company contracted for by
such Intermodal Subsidiary for the benefit of the obligors of such Receivables;
and

              (13)    on real property securing surety bonds in an amount not
to exceed $10,000,000.

     Section VI.2     Amendment of Material Documents.  The Borrower will not,
nor will it permit any of its Subsidiaries to, enter into any amendment of the
Subordinated Debt Documents.

     Section VI.3     Agreements Restricting Distributions From Subsidiaries.
The Borrower will not, nor will it permit any of its Subsidiaries to, enter
into any agreement (other than a Credit Document) which limits distributions to
or any advance by any of the Borrower's Subsidiaries to the Borrower.

     Section VI.4     Merger or Consolidation; Asset Sales.  The Borrower will
not, and will not permit any of its Subsidiaries to, (a)  merge or consolidate
with or into any other Person, unless (i) the Borrower (in the case of any
transaction involving the Borrower) or such Subsidiary (unless such Subsidiary
is merged into the Borrower or another Subsidiary) is the surviving
corporation, and (ii) immediately after giving effect to any such proposed
transaction no Default would exist; or (b) sell, transfer, or otherwise dispose
of any of the Borrower's or such Subsidiary's Property (unless, in the case of
a Subsidiary, such assets are sold, leased, transferred or otherwise conveyed
to another Subsidiary which is a Guarantor) except for (i) sales, transfers and
dispositions in the ordinary course of business for a fair and adequate
consideration, (ii) sales, transfers or dispositions of assets which are
obsolete or are no longer in use and which are not significant to the
continuation of the Borrower or any of its Subsidiaries business; (iii) sales,
transfers or dispositions of assets, other than sales, transfer or dispositions
otherwise permitted by (i), (ii) or (iv) hereof, the Net Cash Proceeds of which
do not exceed $40,000,000 in the aggregate for all such sales, transfers or
dispositions of assets during any fiscal year; or (iv) sales of the assets or
capital stock of any Affiliate of the Borrower other than any of its
Subsidiaries.

     Section VI.5     Restricted Payments.  The Borrower will not, and will not
permit any of its Subsidiaries to, make any Restricted Payment, except that (a)
a wholly-owned Subsidiary of the Borrower may make a Restricted Payment to the
Borrower or another wholly-owned Subsidiary of the Borrower, (b)  provided no
Default has occurred and is continuing or would result therefrom, the Borrower
may pay or prepay the sinking fund payments which are required to be made by
the Borrower under Section 3.4 of the Indenture, provided that the Borrower may
not purchase Subordinated Debentures the aggregate face value of which exceeds
$5,000,000 in any fiscal year, and (c) provided no Default has occurred and is
continuing or would result therefrom, the Borrower or any Subsidiary may make
Restricted Payments of the kind described in clause (b) of the definition of
the term "Restricted Payments" in an aggregate amount not to exceed $9,000,000
in any fiscal year, provided further that if the Borrower's Senior Debt is
rated BBB- or higher by S&P or Baa3 or higher  by Moody's, then the Borrower or
any Subsidiary may make Restricted Payments of the kind described in clause (b)
of the definition of the term "Restricted Payments" in an aggregate amount not
to exceed $18,000,000 in any fiscal year.





                                      -54-
<PAGE>   61

     Section VI.6     Investments, Loans, Advances.  The Borrower will not, and
will not permit any of its Subsidiaries to, make or permit to exist any loans,
advances or capital contributions to, or make any investment in, or purchase or
commit to purchase any stock or other securities or evidences of indebtedness
of or interests in any Person, except the following (provided that after giving
effect thereto there shall exist no Default):

              (1)     the purchase of Liquid Investments with a Bank and the
purchase of Subordinated Debentures to the extent permitted by Section 6.5(b);

              (2)     trade and customer accounts receivable which are for
goods furnished or services rendered in the ordinary course of business and are
payable in accordance with customary trade terms;

              (3)     ordinary course of business contributions, loans or
advances to, or investments in, (i) a direct or indirect Subsidiary of the
Borrower, provided that if, at any time the aggregate amount of all such
contributions, loans or advances to, or investments in, any such Subsidiary
occurring exceeds $5,000,000, the Borrower shall have caused such Subsidiary
(if not then a Guarantor) to have executed and delivered to the Agent an
Accession Agreement, related financing statements and a certificate covering
the same matters described in Section 3.1(a)(iii) with respect to such
Guarantor and the Borrower's counsel shall deliver an opinion with respect
thereto covering the matters previously opined on with respect to each
Guarantor or (ii) the Borrower;

              (4)     contributions to, or capital investments in a Person
which, prior to such contribution or investment, is not a Subsidiary but which
becomes a Subsidiary as a result of such contribution or investment, provided
that (i) if the aggregate amount of such contributions to or investments in any
such Person exceeds $5,000,000, the Borrower shall have caused such Person to
have executed and delivered to the Agent an Accession Agreement, related
financing statements and a certificate covering the same matters described in
Section 3.1(a)(iii) with respect to such Person, and the Borrowers' counsel
shall deliver an opinion with respect thereto covering the matters previously
opined on with regard to each Guarantor; (ii) the aggregate amount of all such
contributions to, or investments in any such Persons which have not so executed
and delivered an Accession Agreement plus the aggregate amount of investments
under paragraph (e) below shall not exceed $5,000,000; and (iii) the aggregate
consideration paid (other than in the form of common stock of the Borrower)
after the Effective Date for such contributions or investments shall not exceed
$5,000,000 in any fiscal year; and

              (5)     other capital investments not otherwise permitted by this
Section 6.6 in any Person which is not, and will not become a Subsidiary of the
Borrower as a result of such capital investment provided that (i) the aggregate
amount of such investments outstanding at any time plus the aggregate amount of
contributions to, or investments in any Persons as contemplated under paragraph
(d) above which have not executed and delivered an Accession Agreement shall
not exceed $5,000,000; (ii) such Person shall be in the same or substantially
similar line or lines of business as the Borrower and its Subsidiaries or a
line of business directly related to providing services of the nature the
Borrower and its Subsidiaries provide on the date this Agreement is executed;
and (iii) the liabilities of such other Person shall be nonrecourse to the
Borrower and its Subsidiaries.





                                      -55-
<PAGE>   62

     Section VI.7     Affiliate Transactions.  Except as expressly permitted
elsewhere in this Agreement, the Borrower will not, and will not permit any of
its Subsidiaries to, make, directly or indirectly: (a) any transfer, sale,
lease, assignment or other disposal of any assets to any  Affiliate of the
Borrower or any purchase or acquisition of assets from any such Affiliate; or
(b) any arrangement or other transaction directly or indirectly with or for the
benefit of any such Affiliate (including without limitation, guaranties and
assumptions of obligations of an Affiliate); provided that the Borrower and its
Subsidiaries (i) may enter into any arrangement or other transaction with any
such Affiliate providing for the leasing of property, the rendering or receipt
of services or the purchase or sale of inventory and other assets in the
ordinary course of business if the monetary or business consideration arising
therefrom would be substantially as advantageous to the Borrower and its
Subsidiaries as the monetary or business consideration which it would obtain in
a comparable arm's length transaction with a Person not such an Affiliate, (ii)
the Borrower and any of its Subsidiaries may guaranty or otherwise assume
obligations of an Affiliate to the extent permitted under Section 6.16 hereof,
and (iii) may maintain the arrangements listed on the attached Schedule 6.7.

     Section VI.8     Maintenance of Ownership of Subsidiaries.  The Borrower
will not, and will not permit any of its Subsidiaries to, sell or otherwise
dispose of any shares of capital stock of any Guarantor except as otherwise
provided in Section 6.4.  Upon the sale or disposition of any Guarantor to any
Person other than the Borrower or any other Guarantor, the Agent will, at the
Borrower's expense, execute and deliver to such Guarantor such documents as
such Guarantor shall reasonably require and take any other actions reasonably
required to evidence or effect the release of such Guarantor's Guaranty and the
termination of the Liens held by the Agent for the benefit of the Banks upon
the Collateral (unless such Liens have been released pursuant to Section
2.17(f)) pursuant to the Guarantors Security Agreement.

     Section VI.9     No Further Negative Pledges.  Except as set forth in
agreements and documentation governing Indebtedness of the Borrower or any of
its Subsidiaries existing on the Effective Date, or with respect to
prohibitions against other encumbrances on specific Property encumbered to
secure payment of particular Indebtedness (which Indebtedness related solely to
such specific Property, and improvements and accretions thereto, and is
otherwise permitted hereby), the Borrower will not, and will not permit any of
its Subsidiaries to, enter into or suffer to exist any agreement (other than
this Agreement and the Credit Documents) (a) prohibiting the creation or
assumption of any Lien upon the Properties of the Borrower or any of its
Subsidiaries, whether now owned or hereafter acquired, or (b) requiring an
obligation to be secured if some other obligation is or becomes secured.

     Section VI.10    Other Businesses.  The Borrower will not, and will not
permit the Guarantors to, substantially alter the character of their respective
businesses from that conducted as of the Effective Date.

     Section VI.11    Debt Service Ratio.  The Borrower will not permit its
ratio, calculated as of the most recent Calculation Day for the applicable
Calculation Period, of (a) EBITDA for the





                                      -56-
<PAGE>   63

Rolling Period ending on such date to (b) Adjusted Consolidated Debt Service
for such Rolling Period to be less than (i) 2.0 to 1.0 through the fiscal
quarter ending December 31, 1999 and (ii) 2.5 to 1.0 thereafter; provided,
however that if the Borrower sells, transfers or otherwise disposes of the
capital stock or all or substantially all of the Property of any of its
Subsidiaries (other than to another Subsidiary which is a Guarantor) which
Subsidiary generates in excess of $5,000,000 of annual EBITDA (as determined in
accordance with the Consolidated annual projections of the Borrower and its
Subsidiaries delivered on or before the Effective Date), then the ratio shall
not be less than 2.25 to 1.0 for each such Calculation Period during fiscal
year 2000 and 2001.

     Section VI.12    Net Worth.  The Borrower will not permit its Consolidated
Net Worth as of the most recent Calculation Day to be less than an amount equal
to $125,000,000 plus (A) 50% of cumulative Consolidated Net Income of the
Borrower (without deduction for quarterly losses) from January 1, 1998 to the
date of determination plus (B) 75% of the net cash proceeds of any issuance of
equity, including any conversion of the Subordinated Debentures by the Borrower
after the Effective Date; provided, however that if the Borrower sells,
transfers or otherwise disposes of the capital stock or all or substantially
all of the Property of any of its Subsidiaries (other than to another
Subsidiary which is a Guarantor) then the minimum Consolidated Net Worth shall
be reduced by up to $30,000,000 in book losses resulting from such sale,
transfer or disposition, on a dollar for dollar basis.  For purposes of
calculating "Net Worth" pursuant to this Section 6.12, all earnings and losses
of Treadco after December 31, 1997 shall be excluded therefrom.

     Section VI.13    Maximum Leverage Ratio.  The Borrower will not permit its
Leverage Ratio to be greater than 3.75 to 1.0 calculated as of the most recent
Calculation Day for the applicable Calculation Period; provided, however that
if the Liens held by the Agent for the benefit of the Banks upon the Collateral
have been released pursuant to Section 2.17(f), then the Borrower's Leverage
Ratio shall not be greater than 3.45 to 1.0 calculated as of the most recent
Calculation Day for the applicable Calculation Period.

     Section VI.14    Capital Expenditures.  The Borrower may make or permit
any of its Subsidiaries to make or commit to make any Capital Expenditure;
provided, however, that Capital Expenditures may not exceed $85,000,000 in an
aggregate amount per fiscal year so long as the Borrower's Senior Debt is not
rated either BBB- or higher by S&P or Baa3 or greater by Moody's.  For purposes
of calculating "Capital Expenditures" pursuant to this Section 6.14, all
Acquisition Expenditures permitted pursuant to Section 6.16 and any Net Cash
Proceeds received pursuant to Section 6.4 shall be excluded.

     Section VI.15    Indebtedness.  The Borrower will not incur or permit to
exist, or permit any of its Subsidiaries to incur or permit to exist, any
Indebtedness other than the Obligations and the following:

              (1)     Indebtedness of the Borrower to any Subsidiary and of any
Subsidiary to the Borrower or another Subsidiary;

              (2)     Indebtedness outstanding on the Effective Date and listed
on Schedule 6.15;





                                      -57-
<PAGE>   64

              (3)     Indebtedness of a corporation which becomes a Subsidiary
after the date hereof, provided that (i) such Indebtedness existed at the time
such corporation became a Subsidiary and was not created in anticipation
thereof and (ii) immediately after giving effect to the acquisition of such
corporation by the Borrower or a Subsidiary thereof, no Default shall have
occurred and be continuing;

              (4)     Capital Leases in connection with permitted Capital
Expenditures pursuant to Section 6.14;

              (5)     Subordinated Debt and other unsecured senior Indebtedness
incurred after the Effective Date (other than Indebtedness permitted pursuant
to paragraphs (a)-(d) above), provided that the Net Cash Proceeds of such
Subordinated Debt and such other unsecured Indebtedness are simultaneously used
to prepay Advances; and

              (6)     extensions, renewals and refinancing of any of the
Indebtedness specified in paragraphs (a) - (c) above so long as the principal
amount of such Indebtedness is not thereby increased.

     Section VI.16    Acquisition Expenditures.  The Borrower shall not and
shall not permit any of its Subsidiaries to make any Acquisition Expenditure,
unless (a) such Acquisition Expenditure is made in substantially the same or
complementary lines of business of the Borrower and does not violate any other
provision of this Agreement; (b) the aggregate amount of the Net Purchase
Prices made during any fiscal year does not exceed $40,000,000; (c) the
aggregate consideration paid in common stock for all Acquisition Expenditures
made during any fiscal year does not exceed $40,000,000; (d) at the time of
such Acquisition Expenditure no Default has occurred and is continuing or would
occur upon the consummation of such acquisition and the Agent shall have
received a Compliance Certificate demonstrating pro forma financial covenant
compliance; and (e) immediately following the making of such Acquisition
Expenditure, the lesser of (i) the aggregate amount of the Commitments or (ii)
the Borrowing Base exceeds the aggregate outstanding principal amount of the
Advances and the Letter of Credit Exposure by at least $20,000,000.


                                  ARTICLE VII

                                    REMEDIES

     Section VII.1    Events of Default.  The occurrence of any of the
following events shall constitute an "Event of Default" under any Credit
Document:

              (1)     Payment.  The Borrower shall fail to pay any principal of
any Note or any Reimbursement Obligation when the same becomes due and payable
as set forth in this Agreement, or any interest on any Note or any fee or other
amount payable hereunder or under any other Credit Document within five days
after the same becomes due and payable;





                                      -58-
<PAGE>   65

              (2)     Representation and Warranties.  Any representation or
warranty made or deemed to be made (i) by the Borrower in this Agreement or in
any other Credit Document, (ii) by the Borrower (or any of its officers) in
connection with this Agreement or any other Credit Document, or (iii) by any
Subsidiary in any Credit Document shall prove to have been incorrect in any
material respect when made or deemed to be made;

              (3)     Covenant Breaches.  (i) The Borrower shall fail to
perform or observe any covenant contained in Sections 5.3 or 5.4, or Section
5.6(e), (f), (g), (h) or (i) or Article VI of this Agreement or the Borrower
shall fail to perform or observe its covenant in Section 4.4 of the Borrower
Security Agreement, or shall fail to cause any Guarantor to perform or observe
its covenant in Section 4.4 of the Guarantors Security Agreement or (ii) the
Borrower or any Guarantor shall fail to perform or observe any term or covenant
set forth in any Credit Document which is not covered by clause (i) above or
any other provision of this Section 7.1 if such failure shall remain unremedied
for 30 days after the earlier of the date written notice of such default shall
have been given to the Borrower or such Guarantor by the Agent or any Bank or
the date a Responsible Officer of the Borrower or any Guarantor has actual
knowledge of such default;

              (4)     Cross-Defaults.  (i) The Borrower or any its Subsidiaries
shall fail to pay any principal of or premium or interest on its Indebtedness
which is outstanding in a principal amount of at least $15,000,000 individually
or when aggregated with all such Indebtedness of the Borrower or its
Subsidiaries so in default (but excluding Indebtedness evidenced by the Notes)
when the same becomes due and payable (whether by scheduled maturity, required
prepayment, acceleration, demand or otherwise), and such failure shall continue
after the applicable grace period, if any, specified in the agreement or
instrument relating to such Indebtedness; (ii) any other event shall occur or
condition shall exist under any agreement or instrument relating to
Indebtedness which is outstanding in a principal amount of at least $15,000,000
individually or when aggregated with all such Indebtedness of the Borrower and
its Subsidiaries so in default, and shall continue after the applicable grace
period, if any, specified in such agreement or instrument, if the effect of
such event or condition is to accelerate, or to permit the acceleration of, the
maturity of such Indebtedness; or (iii) any such Indebtedness shall be declared
to be due and payable, or required to be prepaid (other than by a regularly
scheduled required prepayment), prior to the stated maturity thereof;

              (5)     Insolvency.  The Borrower or any of its Subsidiaries
shall generally not pay its debts as such debts become due, or shall admit in
writing its inability to pay its debts generally, or shall make a general
assignment for the benefit of creditors; or any proceeding shall be instituted
by or against the Borrower or any of its Subsidiaries seeking to adjudicate it
a bankrupt or insolvent, or seeking liquidation, winding up, reorganization,
arrangement, adjustment, protection, relief, or composition of it or its debts
under any law relating to bankruptcy, insolvency or reorganization or relief of
debtors, or seeking the entry of an order for relief or the appointment of a
receiver, trustee or other similar official for it or for any substantial part
of its property and, in the case of any such proceeding instituted against the
Borrower or any such Subsidiary, either such proceeding shall remain
undismissed for a period of 30 days or any of the actions sought in such
proceeding shall occur; or the Borrower or any of its Subsidiaries shall take
any corporate action to authorize any of the actions set forth above in this
paragraph (e);





                                      -59-
<PAGE>   66

              (6)     Judgments.  Any judgment or order for the payment of
money in excess of $15,000,000 (reduced for purposes of this paragraph for the
amount in respect of such judgment or order that a reputable insurer has
acknowledged being payable under any valid and enforceable insurance policy)
shall be rendered against the Borrower or any of its Subsidiaries which, within
30 days from the date such judgment is entered, shall not have been discharged
or execution thereof stayed pending appeal;

              (7)     ERISA.  (i) Any Person shall engage in any "prohibited
transaction" (as defined in Section 406 of ERISA or Section 4975 of the Code)
involving any Plan, (ii) any "accumulated funding deficiency" (as defined in
Section 302 of ERISA), whether or not waived, shall exist with respect to any
Plan, (iii) a Reportable Event shall occur with respect to, or proceedings
shall commence to have a trustee appointed, or a trustee shall be appointed, to
administer or to terminate, any Plan, which Reportable Event or commencement of
proceedings or appointment of a trustee is likely to result in the termination
of such Plan for purposes of Title IV of ERISA, unless such Reportable Event,
proceedings or appointment are being contested by the Borrower in good faith
and by appropriate proceedings, (iv) any Plan shall terminate for purposes of
Title IV of ERISA, (v) the Borrower or any member of the Controlled Group shall
incur any liability in connection with a withdrawal from a Multiemployer Plan
or the insolvency (within the meaning of Section 4245 of ERISA) or
reorganization (within the meaning of Section 4241 of ERISA) of a Multiemployer
Plan, unless such liability is being contested by the Borrower in good faith
and by appropriate proceedings, or (vi) any other event or condition shall
occur or exist, with respect to a Plan; and in each case in clauses (i) through
(vi) above, such event or condition, together with all other such events or
conditions, if any, could subject the Borrower or any Guarantor to any tax,
penalty or other liabilities in the aggregate exceeding $15,000,000;

              (8)     Guaranty.  Any provision of the Guaranty requiring the
payment of the Guaranteed Obligations (as defined in the Guaranty) shall for
any reason cease to be valid and binding on any Guarantor or any Guarantor
shall so state in writing;

              (9)     Invalidity of Subordination Provisions.  The
subordination provisions of the Subordinated Debentures shall be invalidated or
otherwise cease to be in full force and effect.

     Section VII.2    Optional Acceleration of Maturity.  If any Event of
Default (other than an Event of Default pursuant to paragraph (e) of Section
7.1) shall have occurred and be continuing, then, and in any such event,

              (1)     the Agent (i) shall at the request, or may with the
consent, of the Majority Banks, by notice to the Borrower, declare the
obligation of each Bank to make Advances and the obligation of each Issuing
Bank to issue, increase, or extend Letters of Credit to be terminated,
whereupon the same shall forthwith terminate, and (ii) shall at the request, or
may with the consent, of the Majority Banks, by notice to the Borrower, declare
the Notes, all interest thereon, the Letter of Credit Obligations, and all
other amounts payable under this Agreement to be forthwith due and payable,
whereupon the Notes, all such interest, all such Letter of Credit Obligations
and all such amounts shall become and be





                                      -60-
<PAGE>   67

forthwith due and payable in full, without presentment, demand, protest or
further notice of any kind (including, without limitation, any notice of intent
to accelerate or notice of acceleration), all of which are hereby expressly
waived by the Borrower, and

              (2)     the Borrower shall, on demand of the Agent at the request
or with the consent of the Majority Banks, deposit with the Agent into the Cash
Collateral Account an amount of cash equal to the Letter of Credit Exposure as
security for the Obligations to the extent the Letter of Credit Obligations are
not otherwise paid at such time.

     Section VII.3    Automatic Acceleration of Maturity.  If any Event of
Default pursuant to paragraph (e) of Section 7.1 shall occur,

              (1)     the obligation of each Bank to make Advances and the
obligation of each Issuing Bank to issue, increase, or extend Letters of Credit
shall immediately and automatically be terminated and the Notes, all interest
on the Notes, all Letter of Credit Obligations, and all other amounts payable
under this Agreement shall immediately and automatically become and be due and
payable in full, without presentment, demand, protest or any notice of any kind
(including, without limitation, any notice of intent to accelerate or notice of
acceleration), all of which are hereby expressly waived by the Borrower and

              (2)     to the extent permitted by law or court order, the
Borrower shall deposit with the Agent into the Cash Collateral Account an
amount of cash equal to the outstanding Letter of Credit Exposure as security
for the Obligations to the extent the Letter of Credit Obligations are not
otherwise paid at such time.

     Section VII.4    Cash Collateral Account.

              (1)     Pledge.  The Borrower hereby pledges, and grants to the
Agent for the benefit of the Banks, a security interest in all funds held in
the Cash Collateral Account from time to time and all proceeds thereof, as
security for the payment of the Obligations, including without limitation all
Letter of Credit Obligations owing to any Issuing Bank or any other Bank due
and to become due from the Borrower to any Issuing Bank or any other Bank under
this Agreement in connection with the Letters of Credit.

              (2)     Application against Letter of Credit Obligations.  The
Agent may, at any time or from time to time apply funds then held in the Cash
Collateral Account to the payment of any Letter of Credit Obligations owing to
any Issuing Bank, in such order as the Agent may elect, as shall have become or
shall become due and payable by the Borrower to any Issuing Bank under this
Agreement in connection with the Letters of Credit.

              (3)     Duty of Care.  The Agent shall exercise reasonable care
in the custody and preservation of any funds held in the Cash Collateral
Account and shall be deemed to have exercised such care if such funds are
accorded treatment substantially equivalent to that which





                                      -61-
<PAGE>   68

the Agent accords its own property, it being understood that the Agent shall
not have any responsibility for taking any necessary steps to preserve rights
against any parties with respect to any such funds.

     Section VII.5    Non-exclusivity of Remedies.  No remedy conferred upon
the Agent or the Banks is intended to be exclusive of any other remedy, and
each remedy shall be cumulative of all other remedies existing by contract, at
law, in equity, by statute or otherwise.

     Section VII.6    Right of Set-off.  Upon (a) the occurrence and during the
continuance of any Event of Default and (b) the making of the request or the
granting of the consent, if any, specified by Section 7.2 to authorize the
Agent to declare the Notes and any other amount payable hereunder due and
payable pursuant to the provisions of Section 7.2 or the automatic acceleration
of the Notes and all amounts payable under this Agreement pursuant to Section
7.3, each Bank is hereby authorized at any time and from time to time, to the
fullest extent permitted by law, to set off and apply any and all deposits
(general or special, time or demand, provisional or final) at any time held and
other indebtedness at any time owing by such Bank to or for the credit or the
account of the Borrower against any and all of the obligations of the Borrower
now or hereafter existing under this Agreement, the Note held by such Bank, and
the other Credit Documents, irrespective of whether or not such Bank shall have
made any demand under this Agreement, such Note, or such other Credit
Documents, and although such obligations may be unmatured.  Each Bank agrees to
promptly notify the Borrower after any such set-off and application made by
such Bank, provided that the failure to give such notice shall not affect the
validity of such set-off and application.  The rights of each Bank under this
Section are in addition to any other rights and remedies (including, without
limitation, other rights of set-off) which such Bank may have.

                                  ARTICLE VIII

                       AGENCY AND ISSUING BANK PROVISIONS


     Section VIII.1   Authorization and Action.  Each Bank hereby appoints and
authorizes the Agent to take such action as agent on its behalf and to exercise
such powers under this Agreement and the other Credit Documents as are
delegated to the Agent by the terms hereof and of the other Credit Documents,
together with such powers as are reasonably incidental thereto.  As to any
matters not expressly provided for by this Agreement or any other Credit
Document (including, without limitation, enforcement or collection of the
Notes), the Agent shall not be required to exercise any discretion or take any
action, but shall be required to act or to refrain from acting (and shall be
fully protected in so acting or refraining from acting) upon the instructions
of the Majority Banks, and such instructions shall be binding upon all Banks
and all holders of Notes; provided, however, that the Agent shall not be
required to take any action which exposes the Agent to personal liability or
which is contrary to this Agreement, any other Credit Document, or applicable
law.

     Section VIII.2   Agent's Reliance, Etc.  Neither the Agent nor any of its
directors, officers, agents or employees shall be liable for any action taken
or omitted to be taken (including the Agent's own negligence) by it or them
under or in connection with this Agreement or the other





                                      -62-
<PAGE>   69

Credit Documents, except for its or their own gross negligence or willful
misconduct.  Without limitation of the generality of the foregoing, the Agent:
(a) may treat the payee of any Note as the holder thereof until the Agent
receives written notice of the assignment or transfer thereof signed by such
payee and in form satisfactory to the Agent; (b) may consult with legal counsel
(including counsel for the Borrower), independent public accountants and other
experts selected by it and shall not be liable for any action taken or omitted
to be taken in good faith by it in accordance with the advice of such counsel,
accountants or experts; (c) makes no warranty or representation to any Bank and
shall not be responsible to any Bank for any statements, warranties or
representations made in or in connection with this Agreement or the other
Credit Documents; (d) shall not have any duty to ascertain or to inquire as to
the performance or observance of any of the terms, covenants or conditions of
this Agreement or any other Credit Document on the part of the Borrower or its
Subsidiaries or to inspect the property (including the books and records) of
the Borrower or its Subsidiaries; (e) shall not be responsible to any Bank for
the due execution, legality, validity, enforceability, genuineness, sufficiency
or value of this Agreement or any other Credit Document; and (f) shall incur no
liability under or in respect of this Agreement or any other Credit Document by
acting upon any notice, consent, certificate or other instrument or writing
(which may be by telecopier, telegram, cable or telex) believed by it to be
genuine and signed or sent by the proper party or parties.

     Section VIII.3   The Agent and Its Affiliates.  With respect to its
Revolving Commitment, the Advances made by it and the Notes issued to it, the
Agent shall have the same rights and powers under this Agreement as any other
Bank and may exercise the same as though it were not the Agent.  The term
"Bank" or "Banks" shall, unless otherwise expressly indicated, include the
Agent in its individual capacity.  The Agent and its Affiliates may accept
deposits from, lend money to, act as trustee under indentures of, and generally
engage in any kind of business with, the Borrower or any of its Subsidiaries,
and any Person who may do business with or own securities of the Borrower or
any such Subsidiary, all as if the Agent were not an agent hereunder and
without any duty to account therefor to the Banks.

     Section VIII.4   Bank Credit Decision.  Each Bank acknowledges that it
has, independently and without reliance upon the Agent, any Co-Documentation
Agent or any other Bank and based on the financial statements referred to in
Section 4.5 and such other documents and information as it has deemed
appropriate, made its own credit analysis and decision to enter into this
Agreement.  Each Bank also acknowledges that it will, independently and without
reliance upon the Agent, any Co-Documentation Agent or any other Bank and based
on such documents and information as it shall deem appropriate at the time,
continue to make its own credit decisions in taking or not taking action under
this Agreement.

     Section VIII.5   Indemnification.  The Banks severally agree to indemnify
the Agent, the Co-Documentation Agents and each Issuing Bank (to the extent not
reimbursed by the Borrower), according to their respective Pro Rata Shares from
and against any and all liabilities, obligations, losses, damages, penalties,
actions, judgments, suits, costs, expenses or disbursements of any kind or
nature whatsoever which may be imposed on, incurred by, or asserted against the
Agent, any Co-Documentation Agent or such Issuing Bank in any way relating to
or arising out of this Agreement or any action taken or omitted by the Agent,
any Co-Documentation Agent or such





                                      -63-
<PAGE>   70

Issuing Bank under this Agreement or any other Credit Document (including the
Agent's, such Co-Documentation Agent's or such Issuing Bank's own negligence),
provided that no Bank shall be liable for any portion of such liabilities,
obligations, losses, damages, penalties, actions, judgments, suits, costs,
expenses or disbursements resulting from the Agent's, such Co-Documentation
Agent's and such Issuing Bank's gross negligence or willful misconduct.
Without limitation of the foregoing, each Bank agrees to reimburse the Agent
promptly upon demand for its ratable share of any out-of-pocket expenses
(including counsel fees) incurred by the Agent in connection with the
preparation, execution, delivery, administration, modification, amendment or
enforcement (whether through negotiations, legal proceedings or otherwise) of,
or legal advice in respect of rights or responsibilities under, this Agreement
or any other Credit Document, to the extent that the Agent is not reimbursed
for such expenses by the Borrower.

     Section VIII.6   Successor Agent and Issuing Banks.  The Agent or any
Issuing Bank may resign at any time by giving written notice thereof to the
Banks and the Borrower and may be removed at any time with or without cause by
the Majority Banks upon receipt of written notice from the Majority Banks to
such effect.  Upon receipt of notice of any such resignation or removal, the
Majority Banks shall have the right to appoint a successor Agent or Issuing
Bank with, if an Event of Default has not occurred and is not continuing, the
consent of the Borrower, which consent shall not be unreasonably withheld.  If
no successor Agent or Issuing Bank shall have been so appointed, and shall have
accepted such appointment, within 30 days after the retiring Agent's or Issuing
Bank's giving of notice of resignation or the Majority Banks' removal of the
retiring Agent or Issuing Bank, then the retiring Agent or Issuing Bank may, on
behalf of the Banks and the Borrower, appoint a successor Agent or Issuing
Bank, which shall be a commercial bank meeting the financial requirements of an
Eligible Assignee and, in the case of an Issuing Bank, a Bank.  Upon the
acceptance of any appointment as Agent or Issuing Bank by a successor Agent or
Issuing Bank, such successor Agent or Issuing Bank shall thereupon succeed to
and become vested with all the rights, powers, privileges and duties of the
retiring Agent or Issuing Bank, and the retiring Agent or Issuing Bank shall be
discharged from its duties and obligations under this Agreement and the other
Credit Documents, except that the retiring Issuing Bank shall remain an Issuing
Bank with respect to any Letters of Credit issued by such Issuing Bank and
outstanding on the effective date of its resignation or removal and the
provisions affecting such Issuing Bank with respect to such Letters of Credit
shall inure to the benefit of the retiring Issuing Bank until the termination
of all such Letters of Credit.  After any retiring Agent's or Issuing Bank's
resignation or removal hereunder as Agent or Issuing Bank, the provisions of
this Article VIII shall inure to its benefit as to any actions taken or omitted
to be taken by it while it was Agent or Issuing Bank under this Agreement and
the other Credit Documents.

     Section VIII.7   Co-Documentation Agents.  The Co-Documentation Agents
shall have no duties, obligations or liabilities in their capacity as
Co-Documentation Agents.




                                      -64-
<PAGE>   71

                                   ARTICLE IX

                                 MISCELLANEOUS

     Section IX.1     Amendments, Etc.  No amendment or waiver of any provision
of this Agreement, the Notes, or any other Credit Document, nor consent to any
departure by the Borrower or any Guarantor therefrom, shall in any event be
effective unless the same shall be in writing and signed by the Majority Banks
and the Borrower, and then such waiver or consent shall be effective only in
the specific instance and for the specific purpose for which given; provided,
however, that no amendment shall increase the Commitment of any Bank without
the written consent of such Bank, and no amendment, waiver or consent shall,
unless in writing and signed by all the Banks, do any of the following:  (a)
increase the aggregate Commitments of the Banks, (b) reduce the principal of,
or interest on, the Notes or any fees or other amounts payable hereunder or
under any other Credit Document, (c) postpone any date fixed for any payment of
principal of, or interest on, the Notes or any fees or other amounts payable
hereunder, (d) amend Section 2.16 or this Section 9.1, (e) release any
Guarantor from its obligations under the Guaranty, other than the release of
any Guarantor's obligations under the Guaranty in accordance with Section 6.8,
(f) release any Lien in favor of the Agent for the benefit of the Banks on
Property of the Borrower or Guarantors, except as contemplated by the Security
Agreements or as provided in Section 2.17(e) and (f), or (g) amend the
definition of "Majority Banks"; and provided, further, that (i) no amendment,
waiver or consent shall, unless in writing and signed by the Agent, any
Co-Documentation Agent or any Issuing Bank in addition to the Banks required
above to take such action, affect the rights or duties of the Agent, such
Co-Documentation Agent or such Issuing Bank, as the case may be, under this
Agreement or any other Credit Document, and (ii) no waiver or consent to
departure from any of the conditions specified in Section 3.1 or 3.2 shall be
effective unless in writing and signed by the Majority Banks and the Agent.

     Section IX.2     Notices, Etc.  All notices and other communications shall
be in writing (including telecopy or telex) and mailed, telecopied, telexed,
hand delivered or delivered by a nationally recognized overnight courier, if to
the Borrower, at its address at 3801 Old Greenwood Road, Fort Smith, Arkansas
72903,  Attention:   Chief Financial Officer, with a copy to the General
Counsel (telecopy:  (501) 785-6124; telephone:  (501) 785-6000); if to any Bank
at its Domestic Lending Office specified opposite its name on Schedule 9.2; if
to the Agent or to SG in its capacity as Agent or as an Issuing Bank, at its
address at 4800 Trammell Crow Center, 2001 Ross Avenue, Dallas, Texas  75201,
Attention:  David Oldani, Associate and Ms. Terri Jones, Operations (telecopy:
(214) 754-0171;  telephone:  (214) 979- 2777); and if a Notice of Borrowing or
a Notice of Conversion or Continuation to the Agent at the Domestic Lending
Office for the Agent specified opposite its name on Schedule 9.2 or, as to each
party, at such other address or teletransmission number as shall be designated
by such party in a written notice to the other parties.  All such notices and
communications shall, when mailed, telecopied, telexed or hand delivered or
delivered by overnight courier, be effective three days after deposited in the
mails, when telecopy transmission is completed, when confirmed by telex
answer-back or when delivered, respectively, except that notices and
communications to the Agent pursuant to Article II or VIII shall not be
effective until received by the Agent.

     Section IX.3     No Waiver; Remedies.  No failure on the part of any Bank,
the Agent, or any Issuing Bank to exercise, and no delay in exercising, any
right hereunder or under any Note shall operate as a waiver thereof; nor shall
any single or partial exercise of any such right preclude any





                                      -65-
<PAGE>   72

other or further exercise thereof or the exercise of any other right.  The
remedies provided in this Agreement and the other Credit Documents are
cumulative and not exclusive of any remedies provided by law.

     Section IX.4     Costs and Expenses.  The Borrower agrees to pay on demand
all out-of-pocket costs and expenses of the Agent in connection with the
preparation, execution, delivery, administration, modification and amendment of
this Agreement, the Notes and the other Credit Documents including, without
limitation, (a) the fees set forth in the letter agreement dated as of May 29,
1998 between the Borrower and counsel for the Agent, and (b) all reasonable
out-of-pocket costs and expenses, if any, of the Agent, each Co-Documentation
Agent, each Issuing Bank, and each Bank (including, without limitation,
reasonable counsel fees and expenses of the Agent, such Co-Documentation Agent,
such Issuing Bank, and each Bank) in connection with the enforcement (whether
through negotiations, legal proceedings or otherwise) of this Agreement and the
other Credit Documents after an Event of Default has occurred and is
continuing, and (c) to the extent not included in the foregoing, the costs of
any appraisals, title policies, mortgage and intangible taxes, costs of
recordation of any mortgages or Uniform Commercial Code financing statement or
continuation statement, and any related title or Uniform Commercial Code search
conducted subsequent to such recordation, any flood plain search costs, and
other costs usual and customary in connection with the taking of a Lien on real
property.

     Section IX.5     Binding Effect.  This Agreement shall become effective
when it shall have been executed by the Borrower and the Agent, and when the
Agent shall have, as to each Bank, either received a counterpart hereof
executed by such Bank or been notified by such Bank that such Bank has executed
it and thereafter shall be binding upon and inure to the benefit of the
Borrower, the Agent, each Co-Documentation Agent, each Issuing Bank, and each
Bank and their respective successors and assigns, except that the Borrower
shall not have the right to assign its rights or delegate its duties under this
Agreement or any interest in this Agreement without the prior written consent
of each Bank.

     Section IX.6     Bank Assignments and Participations.

              (1)     Assignments.  Any Bank may assign to one or more banks or
other entities all or any portion of its rights and obligations under this
Agreement (including, without limitation, all or a portion of its Revolving
Commitment, the Advances owing to it, the Notes held by it, and the
participation interest in the Letter of Credit Obligations held by it);
provided, however, that (i) each such assignment shall be of a constant, and
not a varying, percentage of all of such Bank's rights and obligations under
this Agreement and shall involve a ratable assignment of such Bank's Revolving
Commitment and such Bank's Revolving Advances, (ii) the amount of the resulting
Revolving Commitment and Revolving Advances of the assigning Bank (unless it is
assigning all its Revolving Commitment) and the assignee Bank pursuant to each
such assignment (determined as of the date of the Assignment and Acceptance
with respect to such assignment) shall in no event be less than $10,000,000 and
shall be an integral multiple of $1,000,000, (iii) each such assignment shall
be to an Eligible Assignee, (iv) the parties to each such assignment shall
execute and deliver to the Agent, for its acceptance and recording in the
Register, an Assignment and Acceptance, together with the Revolving Note
subject to such





                                      -66-
<PAGE>   73

assignment, and (v) each Eligible Assignee (other than the Eligible Assignee of
the Agent or an Eligible Assignee which is an Affiliate of the assigning Bank)
shall pay to the Agent a $3,000 administrative fee.  Upon such execution,
delivery, acceptance and recording, from and after the effective date specified
in each Assignment and Acceptance, which effective date shall be at least three
Business Days after the execution thereof, (A) the assignee thereunder shall be
a party hereto for all purposes and, to the extent that rights and obligations
hereunder have been assigned to it pursuant to such Assignment and Acceptance,
have the rights and obligations of a Bank hereunder and (B) such Bank
thereunder shall, to the extent that rights and obligations hereunder have been
assigned by it pursuant to such Assignment and Acceptance, relinquish its
rights and be released from its obligations under this Agreement (and, in the
case of an Assignment and Acceptance covering all or the remaining portion of
such Bank's rights and obligations under this Agreement, such Bank shall cease
to be a party hereto).  Notwithstanding anything herein to the contrary, any
Bank may assign, as collateral or otherwise, any of its rights under the Credit
Documents to any Federal Reserve Bank.

              (2)     Term of Assignments.  By executing and delivering an
Assignment and Acceptance, the Bank thereunder and the assignee thereunder
confirm to and agree with each other and the other parties hereto as follows:
(i) other than as provided in such Assignment and Acceptance, such Bank makes
no representation or warranty and assumes no responsibility with respect to any
statements, warranties or representations made in or in connection with this
Agreement or the execution, legality, validity, enforceability, genuineness,
sufficiency of value of this Agreement or any other instrument or document
furnished pursuant hereto; (ii) such Bank makes no representation or warranty
and assumes no responsibility with respect to the financial condition of the
Borrower or the Guarantors or the performance or observance by the Borrower or
the Guarantors of any of their obligations under this Agreement or any other
instrument or document furnished pursuant hereto; (iii) such assignee confirms
that it has received a copy of this Agreement, together with copies of the
financial statements referred to in Section 4.5 and such other documents and
information as it has deemed appropriate to make its own credit analysis and
decision to enter into such Assignment and Acceptance; (iv) such assignee will,
independently and without reliance upon the Agent, such Bank or any other Bank
and based on such documents and information as it shall deem appropriate at the
time, continue to make its own credit decisions in taking or not taking action
under this Agreement; (v) such assignee appoints and authorizes the Agent to
take such action as agent on its behalf and to exercise such powers under this
Agreement as are delegated to the Agent by the terms hereof, together with such
powers as are reasonably incidental thereto; and (vi) such assignee agrees that
it will perform in accordance with their terms all of the obligations which by
the terms of this Agreement are required to be performed by it as a Bank.

              (3)     The Register.  The Agent shall maintain at its address
referred to in Section 9.2 a copy of each Assignment and Acceptance delivered
to and accepted by it and a register for the recordation of the names and
addresses of the Banks and the Revolving Commitments of, and principal amount
of the Advances owing to, each Bank from time to time (the "Register").  The
entries in the Register shall be conclusive and binding for all purposes,
absent manifest error, and the Borrower, the Agent, the Issuing Banks, and the
Banks may treat each Person whose name is recorded in the Register as a Bank
hereunder for all purposes of this





                                      -67-
<PAGE>   74

Agreement.  The Register shall be available for inspection by the Borrower or
any Bank at any reasonable time and from time to time upon reasonable prior
notice.

              (4)     Procedures. Upon its receipt of an Assignment and
Acceptance executed by a Bank and an Eligible Assignee, together with the
Revolving Note or, in the case of an assignment to another Bank, Revolving
Notes subject to such assignment, the Agent shall, if such Assignment and
Acceptance has been completed and is in substantially the form of the attached
Exhibit G, (i) accept such Assignment and Acceptance, (ii) record the
information contained therein in the Register, and (iii) give prompt notice
thereof to the Borrower.  Within five Business Days after its receipt of such
notice, the Borrower, at its own expense, shall execute and deliver to the
Agent in exchange for such Note or Notes, a new Revolving Note payable to the
order of such Eligible Assignee in amount equal to the Revolving Commitment
assumed by it pursuant to such Assignment and Acceptance, and if the assigning
Bank has retained any Revolving Commitment hereunder, a new Revolving Note
payable to the order of such Bank in an amount equal to, respectively, the
Revolving Commitment retained by it hereunder.  Such new Notes shall be dated
the effective date of such Assignment and Acceptance and shall otherwise be in
substantially the form of the attached Exhibit A.

              (5)     Participations.  Each Bank may sell participations to one
or more banks or other entities in or to all or a portion of its rights and
obligations under this Agreement (including, without limitation, all or a
portion of its Revolving Commitment, the Advances owing to it, its
participation interest in the Letter of Credit Obligations, and the Revolving
Note held by it); provided, however, that (i) such Bank's obligations under
this Agreement (including, without limitation, its Revolving Commitment to the
Borrower hereunder) shall remain unchanged, (ii) such Bank shall remain solely
responsible to the other parties hereto for the performance of such
obligations, (iii) such Bank shall remain the holder of any such Note for all
purposes of this Agreement, (iv) the Borrower, the Agent, and the Issuing Banks
and the other Banks shall continue to deal solely and directly with such Bank
in connection with such Bank's rights and obligations under this Agreement, (v)
such Bank shall not require the participant's consent to any matter under this
Agreement, except for change in the principal amount of any Note in which the
participant has an interest, reductions in fees or interest, or extending the
Maturity Date, and (vi) such Bank shall give prompt prior notice to the
Borrower of each such participation to be sold by such Bank.  The Borrower
hereby agrees that participants shall have the same rights under Sections 2.8,
2.9, 2.11(c), and 9.7 hereof as the Bank to the extent of their respective
participations.  Notwithstanding the foregoing, upon the receipt of notice by
the Borrower of the sale of a participation by any Bank to one or more banks or
other entities (other than an Affiliate of such Bank) in or to all or a portion
of its rights and obligations under this Agreement (each such bank or other
entity, a "Proposed Participant"), the Borrower shall have the right, but not
the obligation, to select additional banks to replace such Proposed Participant
on the same terms and conditions as the Proposed Participant upon prompt
written notice from the Borrower to the Agent and the Bank selling such
participation. The Borrower shall have ten days from the date of its receipt of
notice of the proposed sale of such participation to the Proposed Participant
to select replacement banks to replace such Proposed Participant.  If the
Borrower does not select any replacement banks or does not elect to select any
replacement banks the applicable Bank may sell such participation to the
Proposed Participant.





                                      -68-
<PAGE>   75

              (6)     Confidentiality.  Each Bank may furnish any information
concerning the Borrower and its Subsidiaries in the possession of such Bank
from time to time to assignees and participants (including prospective
assignees and participants); provided that, prior to any such disclosure, the
assignee or participant or proposed assignee or participant shall agree in
writing to preserve the confidentiality of any confidential information
relating to the Borrower and its Subsidiaries received by it from such Bank.
Such Bank shall promptly deliver a signed copy of any such confidentiality
agreement to the Borrower.

     Section IX.7     Indemnification.  The Borrower shall indemnify the Agent,
the Co-Documentation Agents, the Banks (including any lender which was a Bank
hereunder prior to any full assignment of its Revolving Commitment), the
Issuing Banks, and each affiliate thereof and their respective directors,
officers, employees and agents from, and discharge, release, and hold each of
them harmless against, any and all losses, liabilities, claims or damages to
which any of them may become subject, insofar as such losses, liabilities,
claims or damages arise out of or result from (i) any actual or proposed use by
the Borrower or any Affiliate of the Borrower of the proceeds of any Advance,
(ii) any breach by the Borrower or any Guarantor of any provision of this
Agreement or any other Credit Document, (iii) any investigation, litigation or
other proceeding (including any threatened investigation or proceeding)
relating to the foregoing, or (iv) any Environmental Claim or requirement of
Environmental Laws concerning or relating to the present or previously-owned or
operated properties, or the operations or business, of the Borrower or any of
its Subsidiaries, and the Borrower shall reimburse the Agent, each
Co-Documentation Agent, each Issuing Bank, and each Bank, and each affiliate
thereof and their respective directors, officers, employees and agents, upon
demand for any reasonable out-of-pocket expenses (including legal fees)
incurred in connection with any such investigation, litigation or other
proceeding; and EXPRESSLY INCLUDING ANY SUCH LOSSES, LIABILITIES, CLAIMS,
DAMAGES, OR EXPENSE INCURRED BY REASON OF THE PERSON BEING INDEMNIFIED'S OWN
NEGLIGENCE, BUT EXCLUDING ANY SUCH LOSSES, LIABILITIES, CLAIMS, DAMAGES OR
EXPENSES INCURRED BY REASON OF THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF
THE PERSON TO BE INDEMNIFIED.

     Section IX.8     Execution in Counterparts.  This Agreement may be
executed in any number of counterparts and by different parties hereto in
separate counterparts, each of which when so executed shall be deemed to be an
original and all of which taken together shall constitute one and the same
agreement.

     Section IX.9     Survival of Representations, etc.  All representations
and warranties contained in this Agreement or made in writing by or on behalf
of the Borrower in connection herewith shall survive the execution and delivery
of this Agreement and the Credit Documents, the making of the Advances and any
investigation made by or on behalf of the Banks, none of which investigations
shall diminish any Bank's right to rely on such representations and warranties.
All obligations of the Borrower provided for in Sections 2.8, 2.9, 2.11(c), and
9.7 shall survive any termination of this Agreement and repayment in full of
the Obligations.





                                      -69-
<PAGE>   76

     Section IX.10    Severability.  In case one or more provisions of this
Agreement or the other Credit Documents shall be invalid, illegal or
unenforceable in any respect under any applicable law, the validity, legality
and enforceability of the remaining provisions contained herein or therein
shall not be affected or impaired thereby.

     Section IX.11    Business Loans.  The Borrower warrants and represents
that the Advances evidenced by the Notes are and shall be for business,
commercial, investment or other similar purposes and not primarily for
personal, family, household or agricultural use, as such terms are used in
Chapter One ("Chapter One") of the Texas Credit Code.  At all such times, if
any, as Chapter One shall establish a Maximum Rate, the Maximum Rate shall be
the "indicated rate ceiling" (as such term is defined in Chapter One) from time
to time in effect.

     Section IX.12    Usury Not Intended.  It is the intent of the Borrower and
each Bank in the execution and performance of this Agreement and the other
Credit Documents to contract in strict compliance with applicable usury laws,
including conflicts of law concepts, governing the Advances of each Bank
including such applicable laws of the State of Texas and the United States of
America from time to time in effect.  In furtherance thereof, the Banks and the
Borrower stipulate and agree that none of the terms and provisions contained in
this Agreement or the other Credit Documents shall ever be construed to create
a contract to pay, as consideration for the use, forbearance or detention of
money, interest at a rate in excess of the Maximum Rate and that for purposes
hereof "interest" shall include the aggregate of all charges which constitute
interest under such laws that are contracted for, charged or received under
this Agreement; and in the event that, notwithstanding the foregoing, under any
circumstances the aggregate amounts taken, reserved, charged, received or paid
on the Advances, include amounts which by applicable law are deemed interest
which would exceed the Maximum Rate, then such excess shall be deemed to be a
mistake and each Bank receiving same shall credit the same on the principal of
its Notes (or if such Notes shall have been paid in full, refund said excess to
the Borrower).  In the event that the maturity of the Notes is accelerated by
reason of any election of the holder thereof resulting from any Event of
Default under this Agreement or otherwise, or in the event of any required or
permitted prepayment, then such consideration that constitutes interest may
never include more than the Maximum Rate and excess interest, if any, provided
for in this Agreement or otherwise shall be canceled automatically as of the
date of such acceleration or prepayment and, if theretofore paid, shall be
credited on the applicable Notes (or, if the applicable Notes shall have been
paid in full, refunded to the Borrower). The provisions of this Section shall
control over all other provisions of this Agreement or the other Credit
Documents which may be in apparent conflict herewith.

     Section IX.13    Governing Law.  This Agreement, the Notes and the other
Credit Documents shall be governed by, and construed and enforced in accordance
with, the laws of the State of Texas.

     Section IX.14    Consent to Jurisdiction.  The Borrower hereby irrevocably
submits to the jurisdiction of any Texas state or federal court sitting in
Dallas, Texas in any action or proceeding arising out of or relating to this
Agreement, the Notes and the other Credit Documents, and the Borrower hereby
irrevocably agrees that all claims in respect of such action or proceeding may
be heard and determined in such court.  The Borrower hereby irrevocably





                                      -70-
<PAGE>   77

waives, to the fullest extent it may effectively do so, any right it may have
to the defense of an inconvenient forum to the maintenance of such action or
proceeding.  The Borrower hereby agrees that service of copies of the summons
and complaint and any other process which may be served in any such action or
proceeding may be made by mailing or delivering a copy of such process to the
Borrower at its address specified in Section 9.2.  The Borrower agrees that a
final judgment in any such action or proceeding shall be conclusive and may be
enforced in other jurisdictions by suit on the judgment or in any other manner
provided by law.  Nothing in this Section shall affect the rights of any Bank,
the Agent, or any Co-Documentation Agent to serve legal process in any other
manner permitted by the law or affect the right of any Bank, the Agent or any
Co-Documentation Agent to bring any action or proceeding against the Borrower
or its Property in the courts of any other jurisdiction.

     Section IX.15    Banks Not in Control.  None of the covenants or other
provisions contained in the Credit Documents shall or shall be deemed to, give
the Banks the rights or power to exercise control over the affairs and/or
management of the Borrower, any of its Subsidiaries or any Guarantor, the power
of the Banks being limited to the right to exercise the remedies provided in
the Credit Documents; provided, however, that if any Bank becomes the owner of
any stock, or other equity interest in, any Person whether through foreclosure
or otherwise, such Bank shall be entitled (subject to requirements of law) to
exercise such legal rights as it may have by being owner of such stock, or
other equity interest in, such Person.

     Section IX.16    Headings Descriptive.  The headings of the several
Sections and paragraphs of the Agreement are inserted for convenience only and
shall not in any way affect the meaning or construction of any provision of
this Agreement.

     SECTION IX.17    WAIVERS OF JURY TRIAL.  THE BORROWER, THE AGENT AND THE
BANKS HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE TRIAL BY JURY IN ANY LEGAL
PROCEEDING RELATING TO THIS AGREEMENT OR THE NOTES OR ANY OTHER CREDIT DOCUMENT
OR TO ANY COUNTERCLAIM THEREIN.

     SECTION IX.18    ENTIRE AGREEMENT.  PURSUANT TO SECTION 26.02 OF THE TEXAS
BUSINESS AND COMMERCE CODE, A LOAN AGREEMENT IN WHICH THE AMOUNT INVOLVED IN
THE LOAN AGREEMENT EXCEEDS $50,000 IN VALUE IS NOT ENFORCEABLE UNLESS THE LOAN
AGREEMENT IS IN WRITING AND SIGNED BY THE PARTY TO BE BOUND OR THAT PARTY'S
AUTHORIZED REPRESENTATIVE.

     THE RIGHTS AND OBLIGATIONS OF THE PARTIES TO AN AGREEMENT SUBJECT TO THE
PRECEDING PARAGRAPH SHALL BE DETERMINED SOLELY FROM THE WRITTEN LOAN AGREEMENT,
AND ANY PRIOR ORAL AGREEMENTS BETWEEN THE PARTIES ARE SUPERSEDED BY AND MERGED
INTO THE LOAN AGREEMENT.  THIS WRITTEN AGREEMENT AND THE CREDIT DOCUMENTS, AS
DEFINED IN THIS AGREEMENT, REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND
MAY NOT BE CONTRADICTED BY




                                      -71-
<PAGE>   78

EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE
PARTIES.


                  [Remainder of page left intentionally blank]






                                     -72-
<PAGE>   79

     EXECUTED as of the date first referenced above.

                                       BORROWER:

                                       ARKANSAS BEST CORPORATION


 
                                       ----------------------------------------
                                       David E. Loeffler
                                       Vice President, Chief Financial Officer
                                        and Treasurer





                                      -73-
<PAGE>   80

                                       AGENT:

                                       SOCIETE GENERALE, SOUTHWEST AGENCY


 
                                       ----------------------------------------
                                       Christopher J. Speltz
                                       Director - Head of SG-Dallas


 
                                       ----------------------------------------
                                       David C. Oldani
                                       Associate





                                      -74-
<PAGE>   81

                                       CO-DOCUMENTATION AGENTS:

                                       BANK OF AMERICA NATIONAL TRUST AND
                                            SAVINGS ASSOCIATION


 
                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 




                                      -75-
<PAGE>   82

                                       WELLS FARGO BANK (TEXAS), N.A.



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -76-
<PAGE>   83

                                       BANKS:

                                       SOCIETE GENERALE, SOUTHWEST AGENCY


 
                                       ----------------------------------------
                                       Christopher J. Speltz
                                       Director - Head of SG-Dallas


 
                                       ----------------------------------------
                                       David C. Oldani
                                       Associate





                                      -77-
<PAGE>   84

                                       BANK OF AMERICA NATIONAL TRUST AND
                                            SAVINGS ASSOCIATION



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -78-
<PAGE>   85

                                       WELLS FARGO BANK (TEXAS), N.A.



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 




                                      -79-
<PAGE>   86

                                       ABN AMRO BANK N.V.




                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 

                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -80-
<PAGE>   87

                                       CREDIT LYONNAIS NEW YORK BRANCH



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -81-
<PAGE>   88

                                       DEPOSIT GUARANTY NATIONAL BANK



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -82-
<PAGE>   89

                                       THE FIRST NATIONAL BANK OF CHICAGO




                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -83-
<PAGE>   90

                                       NATEXIS BANQUE BFCE



                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 


                                       ----------------------------------------
                                       By:
                                          -------------------------------------
                                       Title:
                                             ----------------------------------
 





                                      -84-
<PAGE>   91
                                 EXHIBIT A

                                 REVOLVING NOTE


$ ________________________                                    ___________. 19__


         For value received, the undersigned Arkansas Best Corporation, a
Delaware corporation ("Borrower"), hereby promises to pay to the order of
_________________________ ("Bank") the principal amount of _______________ and
____/100 Dollars ($__________) or, if less, the aggregate outstanding principal
amount of each Revolving Advance (as defined in the Credit Agreement referred
to below) made by the Bank to the Borrower, together with interest on the
unpaid principal amount of each such Revolving Advance from the date of such
Revolving Advance until such principal amount is paid in full, at such interest
rates, and at such times, as are specified in the Credit Agreement.

         This Note is one of the Revolving Notes referred to in, and is
entitled to the benefits of, and is subject to the terms of, the Credit
Agreement dated as of June 12, 1998 (as the same may be further amended or
modified from time to time, the "Credit Agreement"), among the Borrower, the
Banks, Bank of America National Trust and Savings Association and Wells Fargo
Bank (Texas), N.A., as Co-Documentation Agents and Societe Generale, Southwest
Agency, as Administrative Agent.  Capitalized terms used in this Note that are
defined in the Credit Agreement and not otherwise defined in this Note have the
meanings assigned to such terms in the Credit Agreement.  The Credit Agreement,
among other things, (a) provides for the making of Revolving Advances by the
Bank to the Borrower from time to time in an aggregate amount not to exceed at
any time outstanding the Dollar amount first above mentioned, the indebtedness
of the Borrower resulting from each such Revolving Advance being evidenced by
this Note and (b) contains provisions for acceleration of the maturity of this
Note upon the happening of certain events stated in the Credit Agreement and
for prepayments of principal prior to the maturity of this Note upon the terms
and conditions specified in the Credit Agreement.

         Both principal and interest are payable in lawful money of the United
States of America to the Agent at 4800 Trammell Crow Center, 2001 Ross Avenue,
Dallas, Texas 75201 (or at such other location or address as may be specified
by the Agent to the Borrower) in same day funds.  The Bank shall record all
Revolving Advances and payments of principal made under this Note, but no
failure of the Bank to make such recordings shall affect the Borrower's
repayment obligations under this Note.
<PAGE>   92

         Except as specifically provided in the Credit Agreement, the Borrower
hereby waives presentment, demand, protest, notice of intent to accelerate,
notice of acceleration, and any other notice of any kind.  No failure to
exercise, and no delay in exercising, any rights hereunder on the part of the
holder of this Note shall operate as a waiver of such rights.

         This Note shall be governed by, and construed and enforced in
accordance with, the laws of the state of Texas (except that Tex. Rev. Civ.
Stat. Ann. Art. 5069, Ch. 15, which regulates certain revolving credit loan
accounts shall not apply to this Note).

                              ARKANSAS BEST CORPORATION



                              By:
                                 -----------------------------------------
                                   David E. Loeffler
                                   Vice President, Chief Financial Officer,
                                   and Treasurer





                                     -2-





<PAGE>   93
                                    EXHIBIT B


                 SUBSIDIARY GUARANTY AND CONTRIBUTION AGREEMENT


         This Subsidiary Guaranty and Contribution Agreement dated as of June
12, 1998 (this "Agreement") is executed by the parties signatory hereto or to an
Accession Agreement in favor of the Agent, the Co-Documentation Agents and the
Banks parties to the Credit Agreement herein described.

                                  INTRODUCTION


         A. This Agreement is given in connection with the Credit Agreement
dated as of June 12, 1998 (as the same may be further amended or modified from
time to time, the "Credit Agreement") among Arkansas Best Corporation, a
Delaware corporation (the "Borrower"), the Banks, Bank of America National Trust
and Savings Association and Wells Fargo Bank (Texas), N.A., as Co-Documentation
Agents, and Societe Generale, Southwest Agency, as Administrative Agent.

         B. The Borrower is the principal financing entity for all capital
requirements of its Subsidiaries, and from time to time the Borrower has made
and will continue to make capital contributions and advances to its
Subsidiaries, including each of the parties hereto (such parties herein called
the "Guarantors"). Each Guarantor is a direct or indirect subsidiary of the
Borrower and will derive substantial direct and indirect benefit from the
transactions contemplated by the Credit Agreement.

         C. Under the Credit Agreement, it is a condition to the making of the
Advances by the Banks and the issuance of the Letters of Credit by the Issuing
Bank that each Guarantor shall have executed and delivered this Agreement.

         Therefore, in order to induce the Banks to make the Advances and the
Issuing Bank to issue its Letters of Credit, each Guarantor hereby agrees as
follows:

Section 1. Definitions. All capitalized terms not otherwise defined in this
Agreement that are defined in the Credit Agreement shall have the meaning
assigned to such terms by the Credit Agreement.

Section 2. Guaranty. Each Guarantor hereby unconditionally guarantees the
punctual payment when due, whether at stated maturity, by acceleration or
otherwise, of all obligations of the Borrower now or hereafter existing under
the Credit Agreement, the Notes, and any other Credit Document, whether for
principal, Reimbursement Obligations, Hedging Obligations owing to any Bank or
any Affiliate of any Bank, interest, fees, expenses, or otherwise (such
obligations being the "Guaranteed

<PAGE>   94


Obligations"), and any and all expenses (including reasonable counsel fees and
expenses) incurred by the Agent, any Co-Documentation Agent or any Bank in
enforcing any rights under this Agreement. Each Guarantor agrees that its
guaranty obligation under this Agreement is a guarantee of payment, not of
collection and that such Guarantor is primarily liable for the payment of the
Guaranteed Obligations.

Section 3. Limit of Liability. Each Guarantor shall be liable under this
Agreement with respect to the Guaranteed Obligations only for amounts
aggregating up to the largest amount that would not render its guaranty
obligation hereunder subject to avoidance under Section 548 of the United States
Bankruptcy Code or any comparable provisions of any state law.

Section 4. Guaranty Absolute. Each Guarantor guarantees that the Guaranteed
Obligations will be paid strictly in accordance with the terms of the Credit
Agreement and the other Credit Documents, regardless of any law, regulation, or
order now or hereafter in effect in any jurisdiction affecting any of such terms
or the rights of the Agent, the Co-Documentation Agents or the Banks with
respect thereto. The liability of each Guarantor under this Agreement shall be
absolute and unconditional irrespective of:

         (a) any lack of validity or enforceability of the Credit Agreement, any
other Credit Document, or any other agreement or instrument relating thereto;

         (b) any change in the time, manner, or place of payment of, or in any
other term of, any of the Guaranteed Obligations, or any other amendment or
waiver of or any consent to departure from the Credit Agreement or any Credit
Document;

         (c) any exchange, release, or nonperfection of any collateral, or any
release or amendment or waiver of or consent to departure from any other
agreement or guaranty, for any of the Guaranteed Obligations; or

         (d) any other circumstances which might otherwise constitute a defense
available to, or a discharge of the Borrower or a Guarantor.

         Section 5. Continuation and Reinstatement, Etc. Each Guarantor agrees
that, to the extent that the Borrower makes payments to the Agent, any
Co-Documentation Agent or any Bank, or the Agent, any Co-Documentation Agent or
any Bank receives any proceeds of collateral, and such payments or proceeds or
any part thereof are subsequently invalidated, declared to be fraudulent or
preferential, set aside, or otherwise required to be repaid, then to the extent
of such repayment the Guaranteed Obligations shall be reinstated and continued
in full force and effect as of the date such initial payment or collection of
proceeds occurred. The Guarantor shall defend and indemnify the Agent, each
Co-Documentation Agent and each Bank from and against any claim or loss under
this Section 5 (including reasonable attorneys' fees and expenses) in the
defense of any such action or suit.


                                      -2-
<PAGE>   95


Section 6.  Certain Waivers.

         6.01. Notice. Each Guarantor hereby waives promptness, diligence,
notice of acceptance, notice of acceleration, notice of intent to accelerate,
and any other notice with respect to any of the Guaranteed Obligations and this
Agreement.

         6.02. Other Remedies. Each Guarantor hereby waives any requirement that
the Agent, any Co-Documentation Agent or any Bank protect, secure, perfect, or
insure any Lien or any Property subject thereto or exhaust any right or take any
action against the Borrower or any other Person or any collateral, including any
action required by Chapter 34 of the Texas Business and Commerce Code.

         6.03. Waiver of Subrogation. (a) Each Guarantor hereby irrevocably
waives, until payment in full of all Guaranteed Obligations and termination of
all Commitments, any claim or other rights which it may acquire against the
Borrower that arise from such Guarantor's obligations under this Agreement or
any other Credit Document, including, without limitation, any right of
subrogation (including, without limitation, any statutory rights of subrogation
under Section 509 of the Bankruptcy Code, 11 U.S.C. ' 509, or otherwise),
reimbursement, exoneration, contribution, indemnification, or any right to
participate in any claim or remedy of the Agent, any Co-Documentation Agent or
any Bank against the Borrower or any collateral which the Agent, any
Co-Documentation Agent or any Bank now has or acquires. If any amount shall be
paid to any Guarantor in violation of the preceding sentence and the Guaranteed
Obligations shall not have been paid in full and all of the Commitments
terminated, such amount shall be held in trust for the benefit of the Agent, the
Co-Documentation Agents and the Banks, and shall promptly be paid to the Agent
for the benefit of the Agent, the Co-Documentation Agents and the Banks to be
applied to the Guaranteed Obligations, whether matured or unmatured, as the
Agent may elect. Each Guarantor acknowledges that it will receive direct and
indirect benefits from the financing arrangements contemplated by the Credit
Agreement and that the waiver set forth in this Section 6.03(a) is knowingly
made in contemplation of such benefits.

         (b) Each Guarantor further agrees that it will not enter into any
agreement providing, directly or indirectly, for any contribution,
reimbursement, repayment, or indemnity by the Borrower or any other Person on
account of any payment by such Guarantor to the Agent or the Banks under this
Agreement.

Section 7.  Representations and Warranties. Each Guarantor hereby represents and
warrants as follows:

         7.01. Corporate Authority. Such Guarantor is a corporation duly
organized, validly existing and in good standing under the laws of the
jurisdiction of its organization, which is set forth on Schedule 4.1 to the
Credit Agreement. The execution, delivery and performance by such Guarantor of
this Agreement are within such Guarantor's corporate powers, have been duly
authorized by all necessary corporate action, and do not


                                      -3-
<PAGE>   96


contravene (a) such Guarantor's charter or bylaws or (b) any law or material
contractual restriction affecting such Guarantor or its Property.

         7.02. Government Approval. No authorization or approval or other action
by, and no notice to or filing with, any Governmental Authority is required for
the due execution, delivery, and performance by such Guarantor of this
Agreement.

         7.03. Binding Obligations. This Agreement is the legal, valid, and
binding obligation of such Guarantor enforceable against such Guarantor in
accordance with its terms subject to the effect of any applicable bankruptcy,
insolvency, reorganization, moratorium, or similar law affecting creditors'
rights (whether considered in a proceeding at law or in equity).

Section 8. Covenants. Each Guarantor will comply with all covenant provisions of
Article V and Article VI of the Credit Agreement to the extent such provisions
are applicable to a Subsidiary of the Borrower.

Section 9. Contribution. As a result of the transactions contemplated by the
Credit Agreement, each of the Guarantors will benefit, directly and indirectly,
from the Obligations and in consideration thereof desire to enter into a
contribution agreement among themselves as set forth in this Section 9 to
allocate such benefits among themselves and to provide a fair and equitable
arrangement to make contributions in the event any payment is made by any
Guarantor hereunder to the Agent or the Banks (such payment being referred to
herein as a "Contribution," and for purposes of this Agreement, includes any
exercise of recourse by the Agent against any Property of a Contributor
designated as collateral under the Guarantors Security Agreement and application
of proceeds of such collateral in satisfaction of such Guarantor's obligations
under this Agreement). The Guarantors hereby agree as follows:

         9.01. Calculation of Contribution. In order to provide for just and
equitable contribution among the Guarantors in the event any Contribution is
made by a Guarantor (a "Funding Guarantor"), such Funding Guarantor shall be
entitled to a contribution from certain other Guarantors for all payments,
damages and expenses incurred by that Funding Guarantor in discharging any of
the Obligations, in the manner and to the extent set forth in this Section. The
amount of any Contribution under this Agreement shall be equal to the payment
made by the Funding Guarantor to the Agent or any other Beneficiary pursuant to
this Agreement and shall be determined as of the date on which such payment is
made.

         9.02. Benefit Amount Defined. For purposes of this Agreement, the
"Benefit Amount" of any Guarantor as of any date of determination shall be the
net value of the benefits to such Guarantor and all of its Subsidiaries
(including any Subsidiaries which may be Guarantors) from extensions of credit
made by the Banks to the Borrower under the Credit Agreement; provided, that in
determining the contribution liability of any Guarantor which is a Subsidiary to
its direct or indirect parent corporation or of any


                                      -4-
<PAGE>   97


Guarantor to its direct or indirect Subsidiary, the Benefit Amount of such
Subsidiary and its Subsidiaries, if any, shall be subtracted in determining the
Benefit Amount of the parent corporation. Such benefits shall include benefits
of funds constituting proceeds of Advances made to the Borrower by the Banks
which are in turn advanced or contributed by the Borrower to such Guarantor or
its Subsidiaries and benefits of Letters of Credit issued pursuant to the Credit
Agreement on behalf of, or the proceeds of which are advanced or contributed or
otherwise benefit, directly or indirectly, such Guarantor and its Subsidiaries
(collectively, the "Benefits"). In the case of any proceeds of Advances or
Benefits advanced or contributed to a Person (an "Owned Entity") any of the
equity interests of which are owned directly or indirectly by a Guarantor, the
Benefit Amount of a Guarantor with respect thereto shall be that portion of the
net value of the benefits attributable to Advances or Benefits equal to the
direct or indirect percentage ownership of such Guarantor in its Owned Entity.

         9.03. Contribution Obligation. Each Guarantor shall be liable to a
Funding Guarantor in an amount equal to the greater of (A) the (i) ratio of the
Benefit Amount of such Guarantor to the total amount of Obligations, multiplied
by (ii) the amount of Obligations paid by such Funding Guarantor and (B) 95% of
the excess of the fair saleable value of the property of such Guarantor over the
total liabilities of such Guarantor (including the maximum amount reasonably
expected to become due in respect of contingent liabilities) determined as of
the date on which the payment made by a Funding Guarantor is deemed made for
purposes of this Agreement (giving effect to all payments made by other Funding
Guarantors as of such date in a manner to maximize the amount of such
contributions).

         9.04. Allocation. In the event that at any time there exists more than
one Funding Guarantor with respect to any Contribution (in any such case, the
"Applicable Contribution"), then payment from other Guarantors pursuant to this
Agreement shall be allocated among such Funding Guarantors in proportion to the
total amount of the Contribution made for or on account of the Borrower by each
such Funding Guarantor pursuant to the Applicable Contribution. In the event
that at any time any Guarantor pays an amount under this Agreement in excess of
the amount calculated pursuant to clause (A) of Subsection 9.03 above, that
Guarantor shall be deemed to be a Funding Guarantor to the extent of such excess
and shall be entitled to contribution from the other Guarantors in accordance
with the provisions of this Section.

         9.05. Subsidiary Payment. The amount of contribution payable under this
Section by any Guarantor shall be reduced by the amount of any contribution paid
hereunder by a Subsidiary of such Guarantor.

         9.06. Equitable Allocation. If as a result of any reorganization,
recapitalization, or other corporate change in the Borrower or any of its
Subsidiaries, or as a result of any amendment, waiver or modification of the
terms and conditions of other Sections of this Agreement or the Obligations, or
for any other reason, the contributions under this Section become inequitable as
among the Guarantors, the Guarantors shall promptly


                                      -5-
<PAGE>   98


modify and amend this Section to provide for an equitable allocation of
contributions. Any of the foregoing modifications and amendments shall be in
writing and signed by all Guarantors.

         9.07. Asset of Party to Which Contribution is Owing. The Guarantors
acknowledge that the right to contribution hereunder shall constitute an asset
in favor of the Guarantor to which such contribution is owing.

         9.08. Subordination. No payments payable by a Guarantor pursuant to the
terms of this Section 9 shall be paid until all amounts then due and payable by
the Borrower to any Bank, pursuant to the terms of the Credit Documents, are
paid in full in cash. Nothing contained in this Section 9 shall affect the
obligations of any Guarantor to any Bank under the Credit Agreement or any other
Credit Documents.

Section 10.  Miscellaneous.

         10.01. Addresses for Notices. All notices and other communications
provided for hereunder shall be in writing, including telegraphic communication,
and delivered or teletransmitted to the Agent, as set forth in the Credit
Agreement, and to each Guarantor, at the address set forth beside such
Guarantor's name on Annex 1 hereto or in the Accession Agreement executed by
such Guarantor, or to such other address as shall be designated by any Guarantor
or the Agent in written notice to the other parties. All such notices and other
communications shall be effective when delivered or teletransmitted to the above
addresses.

         10.02. Amendments, Etc. No waiver of any provision of this Agreement
nor consent to any departure by any Guarantor therefrom shall be effective
unless the same shall be in writing and signed by the Agent, Majority Banks and
the Borrower, and no amendment of this Agreement shall be effective unless the
same shall be in writing and signed by each Guarantor and the Agent, with the
consent of the Majority Banks; provided that any amendment or waiver releasing
any Guarantor from any liability hereunder shall be signed by all the Banks; and
provided further that any waiver or consent shall be effective only in the
specific instance and for the specific purpose for which given. Notwithstanding
the foregoing, in the event that any Subsidiary of the Borrower hereafter is
required in a accordance with the terms of the Credit Agreement or otherwise
agrees to become a guarantor of the Borrower's obligations under the Credit
Documents, then such Subsidiary may become a party to this Agreement by
executing an Accession Agreement ("Accession Agreement") in the form attached
hereto as Annex 2, and each Guarantor and the Agent hereby agrees that upon such
Subsidiary's execution of such Accession Agreement, this Agreement shall be
deemed to have been amended to make such Person a Guarantor hereunder for all
purposes and a party hereto and no signature is required on behalf of the other
Guarantors or the Agent to make such an amendment to this Agreement effective.



                                      -6-
<PAGE>   99


         10.03. No Waiver; Remedies. No failure on the part of the Agent, or any
Bank to exercise, and no delay in exercising, any right hereunder shall operate
as a waiver thereof; nor shall any single or partial exercise of any right
hereunder preclude any other or further exercise thereof or the exercise of any
other right. The remedies herein provided are cumulative and not exclusive of
any remedies provided by law.

         10.04. Right of Set-Off. Upon the occurrence and during the continuance
of any Event of Default, the Agent, the Co-Documentation Agents and the Banks
are hereby authorized at any time, to the fullest extent permitted by law, to
set off and apply any deposits (general or special, time or demand, provisional
or final) and other indebtedness owing by the Agent, the Co-Documentation Agents
or the Banks to the account of any Guarantor against any and all of the
obligations of such Guarantor under this Agreement, irrespective of whether or
not the Agent, the Co-Documentation Agents or the Banks shall have made any
demand under this Agreement and although such obligations may be contingent and
unmatured. The Agent, the Co-Documentation Agents and the Banks agree promptly
to notify each Guarantor affected by any such set-off after any such set-off and
application made by the Agent, the Co-Documentation Agents or the Banks provided
that the failure to give such notice shall not affect the validity of such
set-off and application. The rights of the Agent, the Co-Documentation Agents
and the Banks under this Section 10.04 are in addition to other rights and
remedies (including, without limitation, other rights of set-off) which the
Agent, the Co-Documentation Agents and the Banks may have.

         10.05. Continuing Guaranty; Transfer of Interest. This Agreement shall
create a continuing guaranty and shall (a) remain in full force and effect until
payment in full and termination of the Guaranteed Obligations, (b) be binding
upon each Guarantor, its successors, and assigns, and (c) inure, together with
the rights and remedies of the Agent hereunder, to the benefit of the Agent, the
Co-Documentation Agents, the Banks, and their respective successors,
transferees, and assigns. Without limiting the generality of the foregoing
clause, when any Bank assigns or otherwise transfers any interest held by it
under the Credit Agreement or other Credit Document to any other Person pursuant
to the terms of the Credit Agreement or other Credit Document, that other Person
shall thereupon become vested with all the benefits held by such Bank under this
Agreement. Upon the payment in full and termination of the Guaranteed
Obligations, the guaranties granted hereby shall terminate and all rights
hereunder shall revert to each Guarantor to the extent such rights have not been
applied pursuant to the terms hereof. Upon any such termination, the Agent will,
at each Guarantor's expense, execute and deliver to such Guarantor such
documents as such Guarantor shall reasonably request and take any other actions
reasonably requested to evidence or effect such termination.

         10.06. Governing Law. This Agreement shall be governed by, and
construed and enforced in accordance with, the laws of the State of Texas. Each
Guarantor hereby irrevocably submits to the jurisdiction of any Texas state or
federal court sitting in Dallas, Texas in any action or proceeding arising out
of or relating to this Agreement and the other Credit Documents, and such
Guarantor hereby irrevocably agrees that all claims in respect of such action or
proceeding may be heard and determined in such court. Each


                                      -7-
<PAGE>   100


Guarantor hereby irrevocably waives, to the fullest extent it may effectively do
so, any right it may have to the defense of an inconvenient forum to the
maintenance of such action or proceeding. Each Guarantor hereby agrees that
service of copies of the summons and complaint and any other process which may
be served in any such action or proceeding may be made by mailing or delivering
a copy of such process to such Guarantor at its address specified below. Each
Guarantor agrees that a final judgment in any such action or proceeding shall be
conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other manner provided by law. Nothing in this Section shall affect the
rights of any Bank, the Agent, or any Co-Documentation Agent to serve legal
process in any other manner permitted by the law or affect the right of any
Bank, any Co-Documentation Agent or the Agent to bring any action or proceeding
against any Guarantor or its Property in the courts of any other jurisdiction.

         SECTION 10.07. WAIVERS OF JURY TRIAL. EACH GUARANTOR HEREBY IRREVOCABLY
AND UNCONDITIONALLY WAIVES TRIAL BY JURY IN ANY LEGAL PROCEEDING RELATING TO
THIS AGREEMENT OR ANY OTHER CREDIT DOCUMENT TO WHICH IT IS A PARTY OR TO ANY
COUNTERCLAIM THEREIN.

         SECTION 10.08. ENTIRE AGREEMENT. PURSUANT TO SECTION 26.02 OF THE TEXAS
BUSINESS AND COMMERCE CODE, A LOAN AGREEMENT IN WHICH THE AMOUNT INVOLVED IN THE
LOAN AGREEMENT EXCEEDS $50,000 IN VALUE IS NOT ENFORCEABLE UNLESS THE LOAN
AGREEMENT IS IN WRITING AND SIGNED BY THE PARTY TO BE BOUND OR THAT PARTY'S
AUTHORIZED REPRESENTATIVE.

         THE RIGHTS AND OBLIGATIONS OF THE PARTIES TO AN AGREEMENT SUBJECT TO
THE PRECEDING PARAGRAPH SHALL BE DETERMINED SOLELY FROM THE WRITTEN LOAN
AGREEMENT, AND ANY PRIOR ORAL AGREEMENTS BETWEEN THE PARTIES ARE SUPERSEDED BY
AND MERGED INTO THE LOAN AGREEMENT. THIS WRITTEN AGREEMENT AND THE CREDIT
DOCUMENTS, AS DEFINED IN THIS AGREEMENT, REPRESENT THE FINAL AGREEMENT AMONG THE
PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR
SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.

                     [REMAINDER OF PAGE INTENTIONALLY BLANK]


                                      -8-
<PAGE>   101


         Each Guarantor has caused this Agreement to be duly executed as of the
date first above written.

                                       GUARANTORS:

                                       ABF CARTAGE, INC.
                                       ABF FARMS, INC.
                                       ABF FREIGHT SYSTEM (B.C.) LTD.
                                       ABF FREIGHT SYSTEM CANADA, LTD.
                                       ABF FREIGHT SYSTEM, INC.
                                       AGILE FREIGHT SYSTEM, INC.
                                       AGRICULTURAL EXPRESS OF AMERICA, INC.
                                       BEST SERVICE CORP.
                                       CAROTRANS INTERNATIONAL, INC.
                                       CLIPPER EXXPRESS COMPANY
                                       DATA-TRONICS CORP.
                                       FLEETNET AMERICA, INC.
                                       G.I. TRUCKING COMPANY
                                       LAND-MARINE CARGO, INC.
                                       TRANSPORT REALTY, INC.



                                       By:
                                          --------------------------------------
                                                David E. Loeffler
                                                Authorized Agent


                                      -9-
<PAGE>   102
                                     ANNEX 1
                to Subsidiary Guaranty and Contribution Agreement

                       ADDRESSES OF GUARANTORS FOR NOTICES


ABF Cartage, Inc.                            Clipper Exxpress Company
3801 Old Greenwood Road                      15700 West 103rd Street
Fort Smith, Arkansas 72903                   Lemont, Illinois 60439
 
ABF Farms, Inc.                              Data-Tronics Corp.
3801 Old Greenwood Road                      3801 Old Greenwood Road
Fort Smith, Arkansas 72903                   Fort Smith, Arkansas 72903
 
ABF Freight System (B.C.), Ltd.              FleetNet America, Inc.
3801 Old Greenwood Road                      300 Commerce Drive
Fort Smith, Arkansas 72903                   Cherryville, North Carolina 28021
 
ABF Freight System Canada, Ltd.              G. I. Trucking Company
3801 Old Greenwood Road                      14727 Alondra Boulevard
Fort Smith, Arkansas 72903                   La Mirada, California 90638
 
ABF Freight System, Inc.                     Land-Marine Cargo, Inc.
3801 Old Greenwood Road                      3801 Old Greenwood Road
Fort Smith, Arkansas 72903                   Fort Smith Arkansas 72903
 
Agile Freight System, Inc.                   Transport Realty, Inc.
15700 West 103rd Street                      3801 Old Greenwood Road
Lemont, Illinois 60439                       Fort Smith, Arkansas 72903

Agricultural Express of America, Inc.
15700 West 103rd Street
Lemont, Illinois 60434

Best Service Corp.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

CaroTrans International, Inc.
15700 West 103rd Street
Lemont, Illinois 60434





<PAGE>   103


                                     ANNEX 2
                to Subsidiary Guaranty and Contribution Agreement


                               ACCESSION AGREEMENT

         ___________[NAME OF SUBSIDIARY], a ________________ corporation (the
"Company"), hereby agrees with (i) Societe Generale, Southwest Agency, as
Administrative Agent (the "Agent") under the Credit Agreement dated as of June
12, 1998 among Arkansas Best Corporation, a Delaware corporation which is the
direct or indirect shareholder of the Company, the lenders parties thereto, Bank
of America National Trust and Savings Association and Wells Fargo Bank (Texas),
N.A., as Co-Documentation Agents, and Societe Generale, Southwest Agency as
Administrative Agent (as such agreement is further amended from time to time in
accordance with its terms, the "Credit Agreement"; capitalized terms used herein
and not otherwise defined having the meanings set forth therein), and (ii) the
parties to the Subsidiary Guaranty and Contribution Agreement dated as of June
12, 1998 and the Guarantors Security Agreement dated as of June 12, 1998 each
executed in connection with the Credit Agreement, as follows:

         The Company hereby agrees and confirms that, as of the date hereof, it
(a) intends to be a party to the Guaranty and a party to the Guarantors Security
Agreement and undertakes to perform all the obligations expressed therein,
respectively, of a Guarantor (as defined in the Guaranty) and a Grantor (as
defined in the Guarantors Security Agreement), (b) agrees to be bound by all of
the provisions of the Guaranty and of the Guarantors Security Agreement as if it
had been an original party to such Guaranty and such Guarantors Security
Agreement, and (c) confirms that the representations and warranties set forth in
the Guaranty and the Guarantors Security Agreement with respect to the Company,
a party thereto, are true and correct in all material respects as of the date of
this Accession Agreement.

         For purposes of notices under the Guaranty and under the Guarantors
Security Agreement, the address for the Company is as follows:


                  Attention:
                            -------------------------------
                  Telephone:
                            -------------------------------
                  Telecopy:
                           --------------------------------


         For purposes of Section 3.2 of the Guarantors Security Agreement, the
address of the Company where all of its books and records concerning its
Accounts is [the same as the address set forth above] [as set forth below:].

         For purposes of Section 3.5 of the Guarantors Security Agreement, a UCC
Financing Statement for the Company should be filed in the following office(s):



<PAGE>   104


                  -------------------------

                  -------------------------

         This Accession Agreement shall be governed by and construed in
accordance with the laws of the State of Texas.

         IN WITNESS WHEREOF this Accession Agreement was executed and delivered
as of the ___ day of _________, 19__.


                                       [NAME OF SUBSIDIARY]



                                       -----------------------------------------
                                       By:
                                          --------------------------------------
                                       Title:
                                             -----------------------------------
<PAGE>   105
                                   EXHIBIT C


                               SECURITY AGREEMENT


         This Security Agreement dated as of June 12, 1998 (as amended or
otherwise modified from time to time, the "Security Agreement") is by and
between Arkansas Best Corporation, a Delaware corporation (the "Grantor"), and
Societe Generale, Southwest Agency, as Administrative Agent for the Banks
parties to the Credit Agreement described below (the "Agent").

                                  INTRODUCTION

         The Grantor, Societe Generale, Southwest Agency, as Administrative
Agent, Bank of America National Trust and Savings Association and Well Fargo
Bank (Texas), N.A., as Co-Documentation Agents, and the Banks have entered into
an Credit Agreement dated as of June 12, 1998 (as amended or otherwise modified
from time to time, the "Credit Agreement").  Under the Credit Agreement, the
Grantor is required to execute and deliver this Security Agreement.  Therefore,
in order to induce the Banks to enter into the Credit Agreement and to make the
Advances and the Issuing Banks to issue the Letters of Credit in accordance
with the terms of the Credit Agreement, the Grantor hereby agrees with the
Agent for its benefit and the ratable benefit of the Banks as follows:

         Section 1.  Definitions.

         (a)  All capitalized terms not otherwise defined in this Security
Agreement that are defined in the Credit Agreement shall have the meaning
assigned to such terms by the Credit Agreement.

         (b)  Any terms used in this Security Agreement that are defined in the
Texas Business and Commerce Code ("UCC") shall have the meaning assigned to
those terms by the UCC, whether specified elsewhere in this Security Agreement
or not.

         Section 2.   Security Interest.

         2.1. Grant of Security Interest.  The Grantor hereby grants to the
Agent for its benefit and the ratable benefit of the Banks security interests
in the Collateral (as defined in Section 2.2 below) to secure the performance
and payment of all obligations of the
<PAGE>   106

Grantor now or hereafter existing under the Credit Agreement and the other
Credit Documents, including any extensions, modifications, substitutions,
amendments and renewals thereof, whether for principal, interest, Hedging
Obligations owing to any Bank or any Affiliate of any Bank, fees, expenses,
indemnification, or otherwise (collectively, the "Secured Obligations").

         2.2. Collateral.  "Collateral" shall mean all of the Grantor's right,
title, and interest in the following, whether now owned or hereafter acquired:

         (a)     Revenue Equipment.  All trucks, tractors, trailers and city
tractors, and all accessories and parts therefor or attached thereto (the
"Revenue Equipment");

         (b)     Accounts.  All accounts and all rights to payment owing or to
be owing to the Grantor, wherever the records for such accounts and rights to
payment are held, including all instruments and chattel paper, wherever
located, that represent any right of the Grantor to payment for services
rendered, whether or not it has been earned by performance (all such accounts,
instruments and chattel paper being the "Accounts");

         (c)     Stock.  All shares of capital stock of Treadco, Inc., a
Delaware corporation, and each Subsidiary of the Grantor (collectively herein
all of such shares are called the "Pledged Shares");

         (d)     Collateral Account.  The Collateral Account referred to in
Section 4.7 of this Security Agreement and all Liquid Investments held in the
Collateral Account;

         (e)     Records.  All ledger sheets, files, records, computer
databases and software and documents relating to the foregoing Collateral; and

         (f)     Proceeds.  All proceeds of the foregoing Collateral and, to
the extent not otherwise included, all payments under any insurance, indemnity,
warranty, or guaranty of or for the foregoing Collateral.

         Section 3.  Representations and Warranties.  The Grantor hereby
represents and warrants the following to the Agent and the Banks:

         3.1. Revenue Equipment.  All Revenue Equipment which, under applicable
law, is required to be registered, is properly registered in the name of the
Grantor or, in the case of newly acquired Revenue Equipment, the Grantor is
diligently pursuing the process of causing such Revenue Equipment to be
registered in the Grantor's name.  All Revenue Equipment, the ownership of
which, under applicable law, is evidenced by a certificate of title, is
properly titled in the name of the Grantor.  All certificates of title with
respect to the Revenue Equipment owned by the Grantor will be maintained by the
Custodians (as defined in Section 4.9 of this Security Agreement) at the
address of the Grantor referenced on Schedule 2.17 in the Credit Agreement.





                                      -2-
<PAGE>   107

         3.2. Accounts.  The chief place of business and chief executive office
of the Grantor and the office where the Grantor keeps its records concerning
the Accounts are located at the address for the Grantor on Annex 1 attached
hereto.  None of the Accounts are evidenced by a promissory note or other
instrument.

         3.3. Pledged Shares.  The Pledged Shares are duly authorized, validly
issued and fully paid and non-assessable, and the Agent will be in possession
of all certificates evidencing the Pledged Shares, accompanied by duly executed
instruments of transfer or assignment in blank, with signatures appropriately
guaranteed, and accompanied in each case by any required transfer tax stamps,
all in form and substance reasonably satisfactory to the Agent.

         3.4. Other Liens.  The Grantor is, and will be the record and
beneficial owner of all Collateral pledged by the Grantor free and clear of any
Lien, except for Liens created hereby or Liens or interests otherwise permitted
by the Credit Agreement.  No effective financing statement or other instrument
similar in effect covering all or any part of the Collateral is, or will be on
file in any recording office, except such as may be filed in connection with
this Security Agreement or in connection with Liens or interests otherwise
permitted by the Credit Agreement.

         3.5. Lien Priority and Perfection.

         (a)     This Security Agreement creates valid security interests in
the Collateral, securing the payment of the Secured Obligations, and such
security interests are or will be perfected first priority security interests,
second only to perfected Liens or interests otherwise permitted by the Credit
Agreement, (i) in the case of Collateral other than as described in clause (ii)
and (iii) below following the filing of a UCC Financing Statement in the form
of Annex 2 attached hereto (with the Grantor's name and address filled in under
the title "Debtor") in the office(s) set forth on Annex 3 attached hereto, (ii)
in the case of Pledged Shares, provided that the Agent retains possession of
such Pledged Shares and instruments of transfer or assignment related thereto
which were executed in blank and delivered by the Grantor to the Agent prior to
the date hereof, and (iii) in the case of titled Revenue Equipment, when the
Agent's interest as a secured party is recorded on the certificates of title
relating to the Grantor's titled Revenue Equipment (other than certificates of
title for Revenue Equipment which is already subject to a Lien permitted by the
Credit Agreement) as contemplated by the Custodial Agreement described in
Section 4.9 of this Security Agreement.

         (b)     No other authorization, approval, or other action by, and no
notice to or filing with, any Governmental Authority is necessary to grant the
security interests contemplated hereby, or to allow the Grantor to perform its
obligations hereunder, or to permit the Agent to exercise its rights and
remedies hereunder.





                                      -3-
<PAGE>   108

         Section 4.  Grantor Covenants.

         4.1. Further Assurances.  The Grantor agrees that at any time, at the
Grantor's expense, the Grantor will promptly execute and deliver all further
instruments and documents, and take all further action, that may be reasonably
necessary or that the Agent may reasonably request, in order to perfect and
protect any security interest granted or purported to be granted hereby or to
enable the Agent to exercise and enforce its rights and remedies hereunder with
respect to any Collateral.  Without limiting the generality of the foregoing,
the Grantor will at the Agent's request: (a) deliver and pledge to the Agent
any instrument representing any Account, duly indorsed and accompanied by duly
executed instruments of transfer or assignment, all in form and substance
satisfactory to the Agent, (b) execute and file such financing or continuation
statements, or amendments thereto, and such other instruments or notices as may
be reasonably necessary, or as the Agent may reasonably request, in order to
perfect and preserve the security interests granted or purported to be granted
hereby, and (c) if the Grantor is an owner of Pledged Shares issued by Treadco,
Inc., notify Treadco, Inc. of the Lien on such Pledged Shares created hereby
and cause Treadco, Inc. to send written notice to the Agent acknowledging such
Lien and expressly agreeing to remit any and all dividends and distributions on
account of such Pledged Shares remitted after the date of this Security
Agreement directly to the Agent.

         4.2. Revenue Equipment.  The Grantor shall:

         (a)     cause the Revenue Equipment owned by the Grantor to be
maintained and preserved in accordance with Section 5.7 of the Credit
Agreement, and shall in accordance with past practices, make or cause to be
made all repairs, replacements, and other improvements which are necessary or
desirable to restore the Revenue Equipment to good working order;

         (b)     promptly furnish to the Agent a statement respecting any
material loss or damage to any of the Revenue Equipment owned by the Grantor
which is not repaired;

         (c)     promptly pay or cause to be paid prior to delinquency all
property and other taxes, assessments, and governmental charges or levies
imposed upon, and all claims (including claims for labor, materials and
supplies) against, the Revenue Equipment owned by the Grantor, except to the
extent permitted by the Credit Agreement;

         (d)     promptly cause all Revenue Equipment owned by the Grantor
which, under applicable law, is required to be registered, to be properly
registered in the name of the Grantor, and cause all Revenue Equipment, the
ownership of which, under applicable law, is evidenced by a certificate of
title to be properly titled in the name of the Grantor, and to have the Agent's
interest in such Revenue Equipment properly noted on the





                                      -4-
<PAGE>   109

certificate of title with respect thereof (it being agreed that a Grantor will
not be in default under this provision if the Grantor is diligently pursuing
the process, as applicable, of causing such Revenue Equipment to be registered
in the Grantor's name or to be titled in the Grantor's name or to have the
Agent's interest noted on such certificate of title, provided, however, that
with respect to any newly acquired Revenue Equipment if the process of titling
such Revenue Equipment in the Grantor's name and recording the Agent's interest
on such title is not completed within 120 days after the Grantor's acquisition
of the applicable unit of Revenue Equipment, such unit of Revenue Equipment
shall not be counted in determining the Borrowing Base until such process is
completed).  Until the Agent exercises remedies under this Security Agreement,
the certificates of title with respect to Revenue Equipment owned by the
Grantor shall be maintained by the Custodians at one of the addresses
referenced on Schedule 2.17 of the Credit Agreement as the location of such
certificates of title.

         4.3. Insurance.

         (a)     The Grantor shall, at its own expense, maintain, or cause to
be maintained, insurance with respect to the Revenue Equipment owned by the
Grantor in such amounts, against such risks, in such form, and with such
insurers, as the Credit Agreement requires.  Further, the Grantor shall, at the
request of the Agent, duly deliver certificates of loss casualty insurance to
the Agent showing the Agent as loss payee as its interests may appear.

         (b)     During the continuance of any Event of Default, all loss
casualty insurance payments in respect of such Revenue Equipment shall be paid
to and applied by the Agent as specified in Section 6.

         4.4. Accounts.  The Grantor shall keep its chief place of business and
chief executive office and the office where it keeps the instruments, chattel
paper, or contracts representing Accounts and the records concerning the
Accounts at the location therefor specified in Section 3.2 or, upon 30 days'
prior written notice to the Agent, at such other locations in a jurisdiction
where all actions required by Section 4.1 shall have been taken with respect to
the Accounts.  The Grantor will hold and preserve such instruments, chattel
paper, contracts, and records and will permit representatives of the Agent at
any time during normal business hours to inspect and copy them.

         4.5. Liability Under Contracts.  Notwithstanding anything in this
Security Agreement to the contrary, (a) the execution of this Security
Agreement shall not release the Grantor from its obligations and duties under
the contracts and agreements included in the Collateral to the extent set forth
therein, (b) the exercise by the Agent of any of its rights hereunder shall not
release the Grantor from any of its duties or obligations under the contracts
and agreements included in the Collateral, and (c) neither the Agent nor any
Bank shall have any obligation or liability under the contracts and





                                      -5-
<PAGE>   110

agreements included in the Collateral by reason of the execution and delivery
of this Security Agreement, nor shall the Agent or any Bank be obligated to
perform any of the obligations or duties of the Grantor thereunder or to take
any action to collect or enforce any claim for payment assigned hereunder.

         4.6. Pledged Shares.

         (a)     Following the Grantor's acquisition of any Pledged Shares, the
Grantor shall deliver or cause to be delivered to the Agent all certificates
evidencing such Pledged Shares, accompanied by duly executed instruments of
transfer or assignment in blank, with signatures appropriately guaranteed, and
accompanied in each case by any required transfer tax stamps, all in form and
substance reasonably satisfactory to the Agent.

         (b)     At any time during the continuation of an Event of Default,
the Agent may from time to time in its sole discretion, cause any or all of the
Pledged Shares to be transferred of record into the name of the Agent or a
nominee.  The Grantor will promptly give to the Agent copies of any notices and
other communications received by it with respect to Pledged Shares registered
in the name of the Grantor, and the Agent will promptly give the Grantor copies
of any notices and other communications received by the Agent with respect to
Pledged Shares registered in the name of the Agent or a nominee.

         (c)     Provided that no Event of Default shall be continuing, the
Grantor shall have the right, from time to time, to vote and to give consents,
ratifications and waivers with respect to the Pledged Shares, and the Agent
shall, upon receiving a written request from the Grantor, which request shall
be deemed to be a representation and warranty by the Grantor that no Event of
Default is continuing, deliver to the Grantor or as specified in such request
such proxies, powers of attorney, consents, ratifications and waivers in
respect of any Subsidiary Shares which are registered in the name of the Agent
or a nominee as shall be specified in such request and be in form and substance
satisfactory to the Agent.

         (d)     While an Event of Default shall be continuing, all rights of
the Grantor to exercise the voting and other consensual rights which it would
otherwise be entitled to exercise pursuant to paragraph (c) above shall end
upon notice from the Agent to the Grantor and thereafter the Agent shall have
the right to the extent permitted by law for so long as such Event of Default
continues, and the Grantor shall take all such action as may be necessary or
appropriate to give effect to such right, to vote and to give consents,
ratifications and waivers, and take any other action with respect to all
Pledged Shares with the same force and effect as if the Agent were the absolute
and sole owner thereof.

         (e)     While an Event of Default shall be continuing, the Agent shall
be entitled to receive and retain as Collateral all dividends and distributions
made in respect of the Pledged Shares, and shall deposit all cash dividends
into the Collateral Account described





                                      -6-
<PAGE>   111

in Section 4.7 hereof.  Any such dividends or distributions on account of
Pledged Shares shall, if received by the Grantor, be received in trust for the
benefit of the Agent, be segregated from the other property or funds of the
Grantor, and be forthwith delivered to the Agent as Collateral in the same form
as so received (with any necessary endorsement).

         4.7. Collateral Account.

         (a)     There is hereby established with the Agent a cash collateral
account (the "Collateral Account") in the name and under the control of the
Agent into which there shall be deposited from time to time the cash proceeds
of the Collateral required to be delivered to the Agent pursuant to any
provision of this Agreement.  Any income received by the Agent with respect to
the balance from time to time of the Collateral Account, including any interest
or capital gains on Liquid Investments, shall remain, or be deposited, in the
Collateral Account.  All right, title and interest in and to the cash amounts
on deposit from time to time in the Collateral Account together with any Liquid
Investments from time to time made pursuant to paragraph (c) of this Section
shall vest in the Agent, shall constitute part of the Collateral hereunder and
shall not constitute payment of the Secured Obligations until applied thereto
as hereinafter provided.

         (b)     At any time during the continuation of an Event of Default,
the Agent shall, if so instructed by the Majority Banks, apply or cause to be
applied (subject to collection) any or all of the balance from time to time of
the Collateral Account in the manner specified in Section 6.

         (c)     Amounts on deposit in the Collateral Account shall be invested
and re-invested from time to time in such Liquid Investments as the Grantor
shall determine, which Liquid Investments shall be held in the name and be
under the control of the Agent, provided that, at any time during the
continuation of an Event of Default, the Agent shall, if instructed by the
Majority Banks, liquidate any such Liquid Investments and apply or cause to be
applied the proceeds thereof to the payment of the Secured Obligations in the
manner specified in Section 6.  In order to provide the Agent, for the benefit
of the Banks, with a perfected security interest therein, each Liquid
Investment shall be either:

                 (i)      evidenced by negotiable certificates or instruments,
         or if non-negotiable then issued in the name of the Agent, which
         (together with any appropriate instruments of transfer) are delivered
         to, and held by, the Agent or an agent thereof (which shall not be the
         Grantor or any of its Affiliates) in the State of Texas; or

                 (ii)     in book-entry form and issued by the United States
         and subject to pledge under applicable state law and treasury
         regulations and as to which (in the





                                      -7-
<PAGE>   112

         opinion of counsel to the Agent) appropriate measures shall have been
         taken for perfection of the security interests.

         4.8. Transfer of Certain Collateral; Release of Certain Security
Interest.  The Grantor agrees that it shall not sell, assign, or otherwise
dispose of any Collateral other than Revenue Equipment sold in the ordinary
course of the Grantor's business and in accordance with the terms of the Credit
Agreement without the prior written consent of the Agent and the Majority
Banks.  The Agent shall promptly, at a Grantor's expense, execute and deliver
all further instruments and documents, and take all further action that the
Grantor may reasonably request in order to release its security interest in any
Collateral which is disposed of in accordance with the terms of this Security
Agreement.

         4.9.Release of Security Interest in Revenue Equipment.  (a)  The
Grantor shall be entitled to sell its Revenue Equipment in the ordinary course
of business, prior to the occurrence of any Default and in accordance with the
terms of the Credit Agreement.  In connection with any such sale, the Agent
agrees for its benefit and the benefit of the Banks that the lien of the Agent
recorded on any certificate of title with respect to any Revenue Equipment to
be sold may be released by the Agent's custodians (the "Custodians") pursuant
to a custodial agreement substantially in the form attached hereto as Annex 5
("Custodial Agreement"), with a power of attorney, effective for a period of
one calendar quarter (or the remaining portion thereof) which shall authorize
the Custodians to execute, on behalf of the Agent, all documents and
instruments necessary to release the security interest granted hereunder with
respect to the Revenue Equipment to be sold or transferred, subject to the
limitations set forth in the Custodial Agreement and such power of attorney.
Upon the occurrence of any Default under the Credit Agreement, the Agent may
revoke any then outstanding power of attorney provided in accordance with this
Section, by giving notice of such revocation to the Custodians, and the
Grantor.  Upon the resignation of any individual holding a power of attorney
hereunder, the Agent may designate an agent (whether or not such agent is an
employee of the Grantor or any of its Subsidiaries) to hold a power of
attorney, and such agent may enter onto any premises where the Grantor retains
certificates of title on behalf of the Agent for the purpose of fulfilling such
agent's obligations to the Agent under said power of attorney.

         (b)     At the request of the Agent, the Grantor shall provide the
Agent with a report listing Revenue Equipment owned by the Grantor as of the
end of the most recent fiscal period.

         Section 5.  Remedies.  If any Event of Default shall have occurred and
be continuing

         5.1. UCC Remedies.





                                      -8-
<PAGE>   113

         (a)     To the extent permitted by law, and in the case of Accounts,
the Agent may exercise in respect of the Collateral, in addition to other
rights and remedies provided for in this Security Agreement or otherwise
available to it, all the rights and remedies of a secured party under the UCC
(whether or not the UCC applies to the affected Collateral).

         (b)     All payments received by the Grantor under or in connection
with or in respect of the Collateral shall be deposited with the Agent.

         5.2. Assembly of Collateral.  The Agent may require the Grantor to, at
the Grantor's expense, promptly assemble all or part of the Collateral in
Little Rock, Arkansas; Springfield, Illinois; Atlanta, Georgia; Dallas, Texas;
Los Angeles, California; Denver, Colorado; Salt Lake City, Utah; Dayton, Ohio;
Cherryville, North Carolina; or such other cities as the Grantor and the Agent
may agree at such time; and make it available to the Agent at a place in each
such city to be designated by the Agent which is reasonably convenient to both
parties.  The Agent may occupy any premises owned or leased by the Grantor
where the Collateral or any part thereof is assembled for a reasonable period
in order to effectuate its rights and remedies hereunder or under law, without
obligation to the Grantor in respect of such occupation.

         5.3. Sale of Collateral.  The Agent may sell all or part of the
Collateral at a public or private sale, at any of the Agent's offices or
elsewhere, for cash, on credit, or for future delivery, and upon such other
terms as the Agent may deem commercially reasonable.  The Grantor agrees that
to the extent permitted by law such sales may be made without notice.  If
notice is required by law, the Grantor hereby deems 10 days advance notice of
the time and place of any public sale or the time after which any private sale
is to be made reasonable notification, recognizing that if the Collateral is
perishable or threatens to decline speedily in value or is of a type
customarily sold on a recognized market shorter notice may be reasonable.  The
Agent shall not be obligated to make any sale of Collateral regardless of
notice of sale having been given.  The Agent may adjourn any public or private
sale from time to time by announcement at the time and place fixed therefor,
and such sale may, without further notice, be made at the time and place to
which it was so adjourned.

         5.4. Contract Rights.  The Agent may exercise any rights and remedies
of the Grantor under or in connection with the instruments, chattel paper, or
contracts which represent Accounts or otherwise relate to the Collateral,
including, without limitation, any rights of the Grantor to demand or otherwise
require payment of any amount under, or performance of any provisions of, the
instruments, chattel paper, or contracts which represent Accounts.

         5.5. Accounts.





                                      -9-
<PAGE>   114

         (a)     The Agent may, or may direct the Grantor to, take any action
the Agent deems necessary or advisable to enforce collection of the Accounts
including, without limitation, notifying the account debtors or obligors under
any Accounts of the assignment of such Accounts to the Agent and directing such
account debtors or obligors to make payment of all amounts due or to become due
directly to the Agent.  Upon such notification and direction, and at the
expense of the Grantor, the Agent may enforce collection of any such Accounts,
and adjust, settle, or compromise the amount or payment thereof in the same
manner and to the same extent as the Grantor might have done.

         (b)     After receipt by the Grantor of the notice referred to in
paragraph (a) above, all amounts and proceeds (including instruments) received
by the Grantor in respect of the Accounts shall be received in trust for the
benefit of the Agent hereunder, shall be segregated from other funds of the
Grantor, and shall promptly be paid over to the Agent in the same form as so
received (with any necessary indorsement) to be held as Collateral.  The
Grantor shall not adjust, settle, or compromise the amount or payment of any
receivable, or release wholly or partly any account debtor or obligor thereof,
or allow any credit or discount thereon other than in the ordinary course of
business and consistent with past practices.

         5.6. Pledged Shares.

         (a)     The Agent is authorized in connection with any sale of Pledged
Shares (i) to restrict the prospective bidders on or purchasers of any of the
Pledged Shares to a limited number of sophisticated investors who will
represent and agree that they are purchasing for their own account for
investment and not with a view to the distribution or sale of any such
Collateral, (ii) to cause to be placed on certificates for any or all of the
Pledged Shares a legend to the effect that such security has not been
registered under the Securities Act of 1933 ("Securities Act") and may not be
disposed of in violation of the provisions of the Securities Act, and (iii) to
impose such other limitations or conditions in connection with any such sale as
the Agent reasonably deems necessary or advisable in order to comply with the
Securities Act or any other law or regulation.

         (b)     If the Agent shall determine to exercise its right to sell all
or any of the Pledged Shares and if in the opinion of counsel for the Agent it
is necessary, or if in the opinion of the Agent it is advisable, to have the
Pledged Shares registered under the provisions of the Securities Act, the
Grantor agrees, at its own expense, through the exercise of registration rights
or otherwise, (i) to use its best efforts to cause the issuer of such Pledged
Shares and its officers to execute and deliver, all such instruments and
documents, and to do or cause to be done all other such acts and things,
through the exercise of registration rights or otherwise, as may be necessary
or, in the opinion of the Agent, advisable to register such securities under
the provisions of the Securities Act and to cause the registration statement
relating thereto to become effective and to remain effective for such period as
prospectuses are required by law to be furnished, and to make





                                      -10-
<PAGE>   115

or cause to be made all amendments and supplements thereto and to the related
prospectus which, in the opinion of the Agent, are necessary or advisable, all
in conformity with the requirements of the Securities Act and the rules and
regulations of the Securities and Exchange Commission thereunder, (ii) to use
its best efforts to cause the issuer of such Pledged Shares to agree to make,
and to make available to its security holders as soon as practicable, an
earning statement (which need not be audited) covering a period of at least 12
months, beginning with the first month after the effective date of any such
registration statement, which earning statement will satisfy the provisions of
Section 11(a) of the Securities Act, (iii) to use its best efforts to qualify
such securities under state Blue Sky or securities laws and to obtain the
approval of any governmental authorities for the sale of such securities, as
requested by the Agent, and (iv) to indemnify and hold harmless and use its
best efforts to cause the issuer of such Pledged Shares to indemnify and hold
harmless the Agent, and any underwriters (and any Person controlling any of the
foregoing) from and against any loss, liability, claim, damage and expense (and
reasonable counsel fees incurred in connection therewith) under the Securities
Act or otherwise insofar as such loss, liability, claim, damage or expense
arises out of or is based upon any untrue statement or alleged untrue statement
of a material fact contained in such registration statement or prospectus or in
any preliminary prospectus or any amendment or supplement thereto, or arises
out of or is based upon any omission or alleged omission to state therein a
material fact required to be stated or necessary to make the statements therein
not misleading, such indemnification to remain operative regardless of any
investigation made by or on behalf of the Secured Parties or any underwriters
(or any person controlling any of the foregoing); provided that the Grantor
shall not be liable in any case to the extent that any such loss, liability,
claim, damage or expense arises out of or is based on an untrue statement or
alleged untrue statement or an omission with written information furnished to
such corporation by the Agent or any underwriter expressly for use in such
registration statement or prospectus.  The rights of the Agent under this
subsection (b) are in addition to and not in limitation of the rights of the
Agent as assignee of any registration rights included in the Collateral.

         (c)     Undertakings to Apply Reports.  If the Agent shall determine
to exercise its right to sell all or any of the Pledged Shares pursuant to Rule
144 of the General Rules and Regulations of the Securities Act ("Rule 144"), at
the request of the Agent, the Grantor shall exercise best efforts to cause the
issuer of such Pledged Shares to file, on a timely basis, all annual quarterly
and other reports required to be filed by it under Sections 13 and 15(d) of the
Exchange Act, and the rules and regulations of the Securities and Exchange
Commission thereunder, as amended from time to time.  In addition, at the
request of the Agent, the Grantor shall exercise best efforts to cause the
issuer of such Pledged Shares to cooperate with the Agent so as to enable such
sales to be made in accordance with applicable laws, rules, and regulations and
the requirements of the broker through which the sales are proposed to be
executed, and shall, upon request and assuming that the requirements of Rule
144 have been complied with, furnish at the Grantor's expense an opinion of
counsel to the issuer of such Pledged Shares that the proposed sale is in
compliance with Rule 144.
                                    -11-
<PAGE>   116


         (d)     Treadco Right of First Refusal.  Notwithstanding anything in
this Section 5.6 to the contrary, at any time prior to the date (the "First
Refusal Termination Date") which is 90 days after the first date the Agent
begins to exercise its remedies under Section 6 hereof with respect to any
Collateral covered hereby and gives notice of such exercise of remedies to the
Grantor, the Agent shall give a right of first refusal to Treadco, Inc. to buy
any Pledged Shares issued by Treadco, Inc. to be sold by the Agent in
accordance with this Section; provided, however, that Treadco, Inc. must
exercise its right to purchase such Pledged Shares (a) prior to the 10th
Business Day following the date the Agent receives a binding letter of intent
from any other potential purchaser of such Pledged Shares setting forth the
price such purchaser is willing to pay for such Pledged Shares and other
material terms, which letter of intent was received by the Agent on or prior to
the First Refusal Termination Date, and (b) by paying to the Agent a price
equal or greater to the price for such Pledged Shares specified in such letter
of intent by such other purchaser.

         Section 6.  Application of Collateral.  The proceeds of any sale, or
other realization upon all or any part of the Collateral pledged by the Grantor
shall be applied by the Agent in the following order:

         first, to payment of the expenses of such sale or other realization,
including reasonable compensation to the Agent and its agents and counsel, and
all expenses, liabilities and advances incurred or made by the Agent in
connection therewith, and to the ratable payment of any other unreimbursed
expenses for which the Agent or any Bank is to be reimbursed pursuant to
Section 9.4 of the Credit Agreement;

         second, to the ratable payment of accrued but unpaid interest on the
Secured Obligations;

         third, to the ratable payment of unpaid principal of the Secured
Obligations;

         fourth, to cash secure the Secured Obligations relating to the Letter
of Credit Exposure by depositing necessary amounts in the Collateral Account;
and

         fifth, to the ratable payment of all other amounts payable by the
Grantor under the Credit Agreement and this Security Agreement.

         Any surplus of such cash or cash proceeds held by the Agent and
remaining after payment in full of all the Secured Obligations of the Grantor
shall be paid over to the Grantor or to whomever may be lawfully entitled to
receive such surplus.

         Section 7.  Agent as Attorney-in-Fact for Grantor.



                                    -12-
<PAGE>   117



         7.1. Attorney-In-Fact.  The Grantor hereby irrevocably appoints the
Agent as the Grantor's attorney-in-fact, with full authority to act for the
Grantor and in the name of the Grantor to, in the Agent's discretion:

         (a)     filing one or more financing or continuation statements, and
amendments thereto, relative to all or any part of the Collateral without the
signature of the Grantor where permitted by law;

         (b)     to obtain and adjust insurance required as pursuant to Section
5.3 to the extent the Grantor has failed to provide such insurance;

         (c)     to receive, indorse, and collect any drafts or other
instruments, documents, and chattel paper which are part of the Collateral
pledged by the Grantor; and

         (d)     during the continuance of any Event of Default, to ask,
demand, collect, sue for, recover, compromise, receive, and give acquittance
and receipts for moneys due and to become due under or in respect of any of the
Collateral pledged by the Grantor and to file any claims or take any action or
institute any proceedings which the Agent may deem necessary or desirable for
the collection of any of such Collateral or otherwise to enforce the rights of
the Agent with respect to any of such Collateral.

         The power of attorney granted hereby is coupled with an interest and
is irrevocable.

         7.2. Agent Performance.  If the Grantor fails to perform any covenant
contained herein, the Agent may itself perform, or cause performance of, such
covenant, and the Grantor shall pay for the expenses of the Agent incurred in
connection therewith in accordance with Section 9.1.

         7.3. Agent's Duties.  The powers conferred on the Agent under this
Security Agreement are solely to protect its interest in the Collateral and
shall not impose any duty upon it to exercise any such powers.  Except for the
safe custody of any Collateral in its possession and the accounting for monies
actually received by it hereunder, the Agent shall have no duty as to any
Collateral or as to the taking of any necessary steps to preserve rights
against prior parties or any other rights pertaining to any Collateral.

         Section 8.  Miscellaneous.

         8.1. Expenses.  The Grantor will upon demand pay to the Agent the
amount of any reasonable expenses, including the reasonable fees and
disbursements of its counsel and of any experts and agents, which the Agent may
incur in connection with (a) the custody, preservation, use, or operation of,
or the sale, collection, or other realization of,



                                    -13-
 
<PAGE>   118

any of the Collateral, (b) the exercise or enforcement of any of the rights of
the Agent or the Banks hereunder, and (c) the failure by the Grantor to perform
or observe any of the provisions hereof.

         8.2. Amendments; Etc.  No waiver of any provision of this Security
Agreement nor consent to any departure by the Grantor herefrom shall be
effective unless the same shall be in writing and signed by the Agent (with the
consent of such Banks as may be required pursuant to the Credit Agreement) and
then such waiver or consent shall be effective only in the specific instance
and for the specific purpose for which given.  Any amendment of this Security
Agreement (except as provided in the foregoing sentence) shall be in writing
and signed each of the parties hereto.

         8.3. Addresses for Notices.  All notices and other communications
provided for hereunder shall be made to the parties at their addresses and as
provided in the Credit Agreement.  All such notices and other communications
shall be effective as provided in the Credit Agreement.

         8.4. Continuing Security Interest; Transfer of Interest.  This
Security Agreement shall create a continuing security interest in the
Collateral and shall (a) remain in full force and effect until payment in full
and termination of the Secured Obligations, (b) be binding upon the Grantor,
its successors, and assigns, and (c) inure, together with the rights and
remedies of the Agent hereunder, to the benefit of the Agent, the Banks, and
their respective successors, transferees, and assigns.  Without limiting the
generality of the foregoing clause, when any Bank assigns or otherwise
transfers any interest held by it under the Credit Agreement or other Credit
Document to any other Person pursuant to the terms of the Credit Agreement or
other Credit Document, that other Person shall thereupon become vested with all
the benefits held by such Bank under this Security Agreement.  Upon the payment
in full and termination of the Secured Obligations, the security interest
granted hereby shall terminate and all rights to the Collateral pledged by the
Grantor shall revert to the Grantor to the extent such Collateral shall not
have been sold or otherwise applied pursuant to the terms hereof.  Upon any
such termination, the Agent will, at the Grantor's expense, execute and deliver
to the Grantor such documents as the Grantor shall reasonably request and take
any other actions reasonably requested to evidence or effect such termination.

         8.5. Concerning the Agent.  The provisions of Article VIII of the
Credit Agreement shall inure to the benefit of the Agent in respect of this
Security Agreement and shall be binding upon the parties to the Credit
Agreement in such respect.  In furtherance and not in derogation of the rights,
privileges and immunities of the Agent in its capacity as Agent hereunder:

         (a)     The Agent is authorized to take all such action as is provided
to be taken by it as Agent hereunder and all other action reasonably incidental
thereto.  As to any



                                    -14-
<PAGE>   119

matters not expressly provided for herein (including, without limitation, the
timing and methods of realization upon the Collateral) the Agent shall act or
refrain from acting in accordance with written instructions from the Majority
Banks or, in the absence of such instructions, in accordance with its
discretion.

         (b)     The Agent shall not be responsible for the existence,
genuineness or value of any of the Collateral or for the validity, perfection,
priority or enforceability of the security interests granted hereby in any of
the Collateral, whether impaired by operation of law or by reason of any action
or omission to act on its part hereunder.  The Agent shall have no duty to
ascertain or inquire as to the performance or observance of any of the terms of
this Security Agreement by the Grantor.

         8.6. Choice of Law.  This Security Agreement shall be governed by and
construed and enforced in accordance with the laws of the state of Texas,
except to the extent that the validity or perfection of the security interests
hereunder, or remedies hereunder, in respect of any particular Collateral are
governed by the laws of a jurisdiction other than the state of Texas.




                                    -15-
<PAGE>   120

         The parties hereto have caused this Security Agreement to be duly
executed as of the date first above written.


                                           ARKANSAS BEST CORPORATION,
                                           a Delaware corporation


 
                                           -----------------------------------
                                           David E. Loeffler
                                           Vice President, Chief Financial
                                           Officer, and Treasurer


                                           SOCIETE GENERALE, SOUTHWEST AGENCY,
                                           as Agent



                                           ----------------------------------
                                           Christopher Speltz
                                           First Vice President




                                     -16-
<PAGE>   121
                                    ANNEX 1
                         to Borrower Security Agreement


                    ADDRESS WHERE RECORDS FOR ACCOUNTS AND

                         GENERAL INTANGIBLES ARE KEPT


         Arkansas Best Corporation
         3801 Old Greenwood Rd.
         Fort Smith, Arkansas  72903





<PAGE>   122
                                   ANNEX 2
                        to Borrower Security Agreement


                          UCC-1 FINANCING STATEMENT
 


1.       The name and address of the DEBTOR is:


         Arkansas Best Corporation
         3801 Old Greenwood Road
         Fort Smith, Arkansas  72903

2.       The name and address of the SECURED PARTY is:


         Societe Generale, Southwest Agency
         4800 Trammell Crow Center
         2001 Ross Avenue
         Dallas, Texas 75201

3.       The federal tax I.D. number of the Debtor is:  71-0673405

4.       This Financing Statement covers the following assets or types of
         Collateral:

                 (a)      Revenue Equipment.  All now owned or hereafter
         acquired trucks, tractors, trailers and city tractors, and all
         accessories and parts therefor or attached thereto;

                 (b)      Accounts.  All now owned or hereafter acquired
         accounts and all rights to payment owing or to be owing to the
         Debtor, wherever the records for such accounts and rights to payment
         are held, including all instruments and chattel paper, wherever
         located, that represent any right of the Debtor to payment for services
         rendered, whether or not it has been earned by performance;

                 (c)      Stock.  All shares of capital stock of Treadco, Inc.,
         a Delaware corporation, and each subsidiary of the Debtor;

                 (d)      Records.  All now owned or hereafter acquired ledger
         sheets, files, records, computer databases and software and documents
         relating to the foregoing Collateral; and





<PAGE>   123

                 (e)      Proceeds.  All proceeds of the foregoing Collateral
         and, to the extent not otherwise included, all payments under any
         insurance, indemnity, warranty, or guaranty of or for the foregoing
         Collateral.

                                        DEBTOR:
                                        ------

                                        ARKANSAS BEST CORPORATION



                                        ---------------------------------------
                                        David E. Loeffler
                                        Vice President, Chief Financial Officer,
                                        and Treasurer





                                      -2-
<PAGE>   124
                                   ANNEX 3
                        to Borrower Security Agreement

                             UCC FILING LOCATIONS


Arkansas Secretary of State
Office of the County Clerk of Sebastian County, Arkansas





<PAGE>   125
                                   ANNEX 4
                        to Borrower Security Agreement

                             CUSTODIAL AGREEMENT


         This Custodial Agreement ("Agreement") dated as of June 12, 1998, is
among the individuals signatory hereto as Custodians below, each such
individual residing at the address set forth below his or her name below (such
individuals each herein called the "Custodian"), and Societe Generale,
Southwest Agency, as Administrative Agent (the "Agent") under the Credit
Agreement (as amended or otherwise modified from time to time, the "Credit
Agreement") dated as of June 12, 1998 among Arkansas Best Corporation, a
Delaware corporation (the "Borrower"), the lenders parties thereto (the
"Banks"), Bank of America National Trust and Savings Association and Wells
Fargo Bank (Texas), N.A., as Co-Documentation Agents, and the Agent.  All
capitalized terms defined in the Credit Agreement and used herein without
definition shall have the same meanings herein as therein defined.

         WHEREAS, the Agent has requested the Custodian to act on the Agent's
behalf to protect and preserve the Agent's rights, for the benefit of the
Banks, with respect to certain Revenue Equipment pledged as collateral and
securing the obligations of the Borrower and each Guarantor to the Banks; and

         WHEREAS, the Custodian has agreed so to act on behalf of the Agent
under the terms of this Agreement;

         NOW, THEREFORE, in consideration of the premises and intending to be
legally bound hereby, the parties hereto agree as follows:

         (a)     As described in the Borrower Security Agreement and the
Guarantors Security Agreement, and subject to the limitations described
therein, any Grantor (as defined in such Security Agreements) may sell or
transfer Revenue Equipment constituting Collateral (as defined in such Security
Agreements) in the ordinary course of business.  Due to the difficulty of
administering such sales if the Agent were to hold the certificates of title
with respect to all Revenue Equipment at its offices in Dallas, Texas, the
Agent hereby designates each Custodian, as agent for the Agent, and by this
Agreement authorizes such Custodian to hold such certificates of title for the
Agent at the offices specified on Schedule 2.17 to the Credit Agreement.  By
execution hereof, each Custodian agrees that he or she shall act as Custodian
for the Agent as herein provided and shall not take any action to release the
Agent's lien on any of such certificates of title except as may from time to
time be necessary to permit ordinary course of business sales of Revenue
Equipment prior to the occurrence of a Default under the Credit Agreement in
accordance with the terms of a power of attorney which will from time to time
be executed and delivered to such Custodian by the Agent.





<PAGE>   126

         (b)     The Agent and each Custodian agree that such Custodian will
act in accordance with the terms hereof on behalf of the Agent, to protect the
Agent's interest in said Revenue Equipment for which ownership is evidenced by
a certificate of title and in which the Agent has an interest.  Each Custodian
shall take reasonable measures and exercise reasonable care to prevent any
Person other than any additional Custodian appointed by the Agent under the
terms of an agreement substantially similar to this Agreement, from releasing
or causing to be released the Agent's lien on any such Revenue Equipment, and
will promptly notify the Agent of any such actions of which such Custodian
becomes aware.

         (c)     The Agent anticipates issuing a power of attorney
substantially in the form of the Schedule attached hereto to the Custodian on a
periodic basis, each for a limited duration, as described in Section 4.9 of the
Borrower Security Agreement and the Guarantors Security Agreement to permit the
Custodian to act on behalf of the Agent in releasing the Agent's lien on
Revenue Equipment sold in accordance with the Credit Agreement and such
Security Agreements and in supplying lienholder information to the proper
governmental authorities for title processing and licensing necessary to
reflect the Agent's continuing security interest in Revenue Equipment.  Each
Custodian recognizes that the power of attorney received by him or her shall be
broad to enable the release of the Agent's lien as contemplated by the Security
Agreements but nevertheless agrees that he or she will only release liens on
Revenue Equipment in accordance with the terms of the Security Agreements and
this Agreement, and such Custodian is hereby authorized to do so and to supply
lienholder information.  No Custodian will release or take any action toward
releasing any liens if such Custodian has reason to believe that (a) such
release would not be in compliance with the terms of the Security Agreements or
this Agreement, or (b) representations by employees, officers or other agents
of the Grantor to the effect that certain sales or transfers comply with the
terms of the Security Agreements are untrue, and such Custodian will promptly
notify the Agent thereof.

         (d)     Upon the occurrence of any Default under the Credit Agreement,
the Agent may by notice to each Custodian, immediately revoke the power of
attorney in effect at such time, and upon receipt of such notice which may be
by telephone, telecopy or telex, such Custodian shall not take any further
action to release any lien until instructed otherwise by the Agent.

         (e)     Any Custodian may resign as Custodian hereunder upon 14 days'
advance written notice to the Agent and the Borrower.  Without limiting any
rights of the Agent under the Credit Agreement and the Security Agreements, the
Agent may terminate any Custodian's responsibilities hereunder (a) immediately
in the event that such Custodian breaches his agreements, covenants or
responsibilities hereunder or (b) upon 14 days' written notice, without cause,
with the consent of the Borrower.  Upon the resignation or termination of any
Custodian, such Custodian shall have no further rights or responsibilities
hereunder and shall immediately return to the Agent any then effective





<PAGE>   127

power of attorney; such Custodian will not hold himself or herself out as
having any authority as a Custodian, and such Custodian shall notify all
Persons as may be reasonably necessary to resolve any confusion, that such
individual is no longer a Custodian hereunder.

         (f)     This Agreement may be amended or waived only by a writing
signed by the Agent, the Borrower and each Custodian.  This Agreement shall be
construed in accordance with and governed by the laws of the State of Texas.
If any term of this Agreement shall be held to be invalid, illegal or
unenforceable, the validity of all other terms hereof shall be in no way
affected thereby, and this Agreement shall be construed and be enforceable as
if such invalid, illegal or unenforceable term had not been included herein.


                    [REMAINDER OF PAGE INTENTIONALLY BLANK]





                                      -3-
<PAGE>   128

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be executed as an instrument under seal as of the date first above written.


                              SOCIETE GENERALE, SOUTHWEST
                              AGENCY, as Agent


 
                              ----------------------------------------------
                              By:
                                 -------------------------------------------
                              Title:
                                    ----------------------------------------


                              CUSTODIANS:

 
                              ---------------------------------------------
                              Name:
                                   ----------------------------------------

                              Address:

 
                              ---------------------------------------------
 
                              ---------------------------------------------
                              Telephone:
                                        -----------------------------------
                              Telecopy:
                                       ------------------------------------

         The undersigned, Arkansas Best Corporation, hereby recognizes that any
Custodian referred to above shall, as agent for the Agent, hold certificates of
title to Revenue Equipment which is subject to a Lien in favor of the Agent for
the benefit of the Banks at the office referred to in the foregoing Custodial
Agreement and, accordingly, for valuable consideration, receipt of which is
hereby acknowledged, the undersigned grants such Custodian on behalf of itself
and its Subsidiaries a continuing right to use its offices for such purpose as
may be necessary and convenient to carry out the provisions of the foregoing
Custodial Agreement.

                                  ARKANSAS BEST CORPORATION


 
                                  -----------------------------------------
                                  David E. Loeffler Vice President, Chief
                                  Financial Officer, and Treasurer





                                      -4-
<PAGE>   129

                        SCHEDULE TO CUSTODIAL AGREEMENT

                               POWER OF ATTORNEY

         This Power of Attorney is made the ___ day of _________, 19__, by
Societe Generale, Southwest Agency, as Administrative Agent (the "Agent") for
itself and the lenders which are or may become parties to the Credit Agreement
dated as of June 12, 1998 among Arkansas Best Corporation, such lenders, Bank
of America National Trust and Savings Association and Wells Fargo Bank (Texas),
N.A., as Co-Documentation Agents, and the Agent (as it may be amended or
otherwise modified from time to time, the "Credit Agreement").

         KNOW ALL PERSONS BY THESE PRESENTS, that the Agent does hereby
constitute and appoint ______________________________ as the Agent's true and
lawful attorney and in the name, place, and stead of the Agent to execute, on
behalf of the Agent, such documents and instruments necessary to release the
security interest or lien granted by the Grantor (as defined in the Borrower
Security Agreement and the Guarantors Security Agreement referenced in the
Credit Agreement) on the revenue equipment for which a certificate of title has
been issued and which designates the Agent as the secured party on the
application for certificate of title or certificate of title, as appropriate,
with respect to any revenue equipment of the Grantor the ownership of which is
evidenced by a certificate of title.

         This Power of Attorney shall expire at the close of business on ______'
19__.

         IN WITNESS WHEREOF, the Agent has caused this Power of Attorney to be
duly executed this ___ day of ___________, 19__.



                              SOCIETE GENERALE, SOUTHWEST
                              AGENCY, as Agent


 
                              --------------------------------------------
                              By:
                                 -----------------------------------------
                              Title:
                                    --------------------------------------





<PAGE>   130

I attest to the fact that this is a true and
exact copy of the Original Power of Attorney

Subscribed and sworn to before me
this _____ day of __________, 199__.


Notary Public
My Commission Expires:__________





                                      -2-

<PAGE>   131
                                    EXHIBIT D


                               SECURITY AGREEMENT


         This Security Agreement dated as of June 12, 1998 (as amended or
otherwise modified from time to time, the "Security Agreement") is by and among
the parties named as Grantors on the signature pages hereto or on the signature
page of an Accession Agreement (as herein defined) executed after the date
hereof (collectively herein such parties are called the "Grantors", and each a
"Grantor"), and Societe Generale, Southwest Agency, as Administrative Agent for
the Banks parties to the Credit Agreement described below (the "Agent").

                                  INTRODUCTION

         The Agent, Arkansas Best Corporation, a Delaware corporation (the
"Borrower") which is the direct or indirect sole shareholder of each Grantor,
Societe Generale, Southwest Agency, as Administrative Agent, Bank of America
National Trust and Savings Association and Wells Fargo Bank (Texas) N.A., as
Co-Documentation Agents, and the Banks have entered into a Credit Agreement
dated as of June 12, 1998, (as amended or otherwise modified from time to time,
the "Credit Agreement"). Each Grantor has guaranteed the Borrower's obligations
under the Credit Agreement pursuant to the Guaranty dated as of June 12, 1998,
each among the Grantors in favor of the Banks, the Co-Documentation Agents and
the Agent (as amended or otherwise modified from time to time, the "Guaranty").
Under the Credit Agreement, each Grantor is required to execute and deliver this
Security Agreement. Therefore, in order to induce the Banks to enter into the
Credit Agreement and to make the Advances and the Issuing Banks to issue the
Letters of Credit in accordance with the terms of the Credit Agreement, each
Grantor hereby agrees with the Agent for its benefit and the ratable benefit of
the Banks as follows:

         Section 1.  Definitions.

         (a) All capitalized terms not otherwise defined in this Security
Agreement that are defined in the Credit Agreement shall have the meaning
assigned to such terms by the Credit Agreement.

         (b) Any terms used in this Security Agreement that are defined in the
Texas Business and Commerce Code ("UCC") shall have the meaning assigned to
those terms



<PAGE>   132

by the UCC, whether specified elsewhere in this Security Agreement
or not.

         Section 2. Security Interest.

         2.1. Grant of Security Interest. Each Grantor hereby grants to the
Agent for its benefit and the ratable benefit of the Banks security interests in
the Collateral (as defined in Section 2.2 below) to secure the performance and
payment of all obligations of such Grantor now or hereafter existing under the
Guaranty, including any extensions, modifications, substitutions, amendments and
renewals thereof, whether for principal, interest, fees, Hedging Obligations
owing to any Bank or any Affiliate of any Bank, expenses, indemnification, or
otherwise (collectively, the "Secured Obligations").

         2.2. Collateral. "Collateral" shall mean all of each Grantor's right,
title, and interest in the following, whether now owned or hereafter acquired:

         (a) Revenue Equipment. All trucks, tractors, trailers and city
tractors, and all accessories and parts therefor or attached thereto (the
"Revenue Equipment");

         (b) Accounts. All accounts and all rights to payment owing or to be
owing to each Grantor, wherever the records for such accounts and rights to
payment are held, including all instruments and chattel paper, wherever located,
that represent any right of such Grantor to payment for services rendered,
whether or not it has been earned by performance (all such accounts,
instruments, and chattel paper being the "Accounts");

         (c) Stock. All shares of each Subsidiary of each Grantor (collectively
herein all of such shares are called the "Pledged Shares");

         (d) Collateral Account. The Collateral Account referred to in Section
4.7 of this Security Agreement and all Liquid Investments held in the Collateral
Account;

         (e) Records. All ledger sheets, files, records, computer databases and
software and documents relating to the foregoing Collateral; and

         (f) Proceeds. All proceeds of the foregoing Collateral and, to the
extent not otherwise included, all payments under any insurance, indemnity,
warranty, or guaranty of or for the foregoing Collateral.

         Section 3. Representations and Warranties. Each Grantor hereby
represents and warrants the following to the Agent and the Banks:



                                      -2-
<PAGE>   133


         3.1. Revenue Equipment. All Revenue Equipment which, under applicable
law, is required to be registered, is properly registered in the name of such
Grantor or, in the case of newly acquired Revenue Equipment, such Grantor is
diligently pursuing the process of causing such Revenue Equipment to be
registered in such Grantor's name. All Revenue Equipment, the ownership of
which, under applicable law, is evidenced by a certificate of title, is properly
titled in the name of such Grantor. All certificates of title with respect to
the Revenue Equipment owned by such Grantor will be maintained by the Custodians
(as defined in Section 4.9 of this Security Agreement) at the address referenced
for such Grantor on Schedule 2.17 to the Credit Agreement.

         3.2. Accounts. The chief place of business and chief executive office
of each Grantor and the office where such Grantor keeps its records concerning
the Accounts are located at the address for such Grantor on Annex 1 attached
hereto or as set forth in the Accession Agreement executed by such Grantor. None
of the Accounts is evidenced by a promissory note or other instrument.

         3.3. Pledged Shares. The Pledged Shares are duly authorized, validly
issued and fully paid and non-assessable, and the Agent will be in possession of
all certificates evidencing the Pledged Shares, accompanied by duly executed
instruments of transfer or assignment in blank, with signatures appropriately
guaranteed, and accompanied in each case by any required transfer tax stamps,
all in form and substance reasonably satisfactory to the Agent.

         3.4. Other Liens. Each Grantor is, and will be the record and
beneficial owner of all Collateral pledged by such Grantor free and clear of any
Lien, except for Liens created hereby or Liens or interests otherwise permitted
by the Credit Agreement. No effective financing statement or other instrument
similar in effect covering all or any part of the Collateral is, or will be on
file in any recording office, except such as may be filed in connection with
this Security Agreement or in connection with Liens or interests otherwise
permitted by the Credit Agreement.

         3.5. Lien Priority and Perfection. (a) This Security Agreement creates
valid security interests in the Collateral, securing the payment of the Secured
Obligations, and such security interests (other than security interests in
Property of any Canadian Subsidiary) are or will be perfected first priority
security interests, second only to interests otherwise permitted by the Credit
Agreement, with respect to each Grantor's Collateral (i) in the case of
Collateral other than as described in clauses (ii) and (iii) below following the
filing of a UCC Financing Statement in the form of Annex 2 attached hereto (with
each Grantor's name and address filed in under the title "Debtor") in the
office(s) set forth on Annex 3 attached hereto with respect to such Grantor or
in the Accession Agreement executed by such Grantor, (ii) in the case of the
Pledged Shares owned by such Grantor, provided that the Agent retains possession
of such Pledged Shares and instruments of transfer or assignment related thereto
which were executed in blank by such Grantor and



                                      -3-
<PAGE>   134


delivered by such Grantor to the Agent prior to the date hereof, and (iii)
in the case of titled Revenue Equipment of such Grantor, when the Agent's
interest as a secured party is recorded on the certificates of title relating to
such Grantor's titled Revenue Equipment (other than certificates of title for
Revenue Equipment which is already subject to a Lien permitted by the Credit
Agreement) as contemplated by the Custodial Agreement described in Section 4.9
of this Security Agreement.

         (b) No other authorization, approval, or other action by, and no notice
to or filing with, any Governmental Authority is necessary to grant the security
interests contemplated hereby, or to allow any Grantor to perform its
obligations hereunder, or to permit the Agent to exercise its rights and
remedies hereunder.

         Section 4.  Grantor Covenants.

         4.1. Further Assurances. Each Grantor agrees that at any time, at such
Grantor's expense, such Grantor will promptly execute and deliver all further
instruments and documents, and take all further action, that may be reasonably
necessary or that the Agent may reasonably request, in order to perfect and
protect any security interest granted or purported to be granted hereby or to
enable the Agent to exercise and enforce its rights and remedies hereunder with
respect to any Collateral. Without limiting the generality of the foregoing,
each Grantor will at the Agent's request: (a) deliver and pledge to the Agent
any instrument representing any Account, duly indorsed and accompanied by duly
executed instruments of transfer or assignment, all in form and substance
satisfactory to the Agent, and (b) execute and file such financing or
continuation statements, or amendments thereto, and such other instruments or
notices as may be reasonably necessary, or as the Agent may reasonably request,
in order to perfect and preserve the security interests granted or purported to
be granted hereby.

         4.2.  Revenue Equipment.  Each Grantor shall:

         (a) cause the Revenue Equipment owned by such Grantor to be maintained
and preserved in accordance with Section 5.7 of the Credit Agreement, and shall
in accordance with past practices, make or cause to be made all repairs,
replacements, and other improvements which are necessary or desirable to restore
the Revenue Equipment to good working order;

         (b) promptly furnish to the Agent a statement respecting any material
loss or damage to any of Revenue Equipment owned by such Grantor which is not
repaired;

         (c) promptly pay or cause to be paid prior to delinquency all property
and other taxes, assessments, and governmental charges or levies imposed upon,
and all claims (including claims for labor, materials and supplies) against, the
Revenue Equipment owned by such Grantor, except to the extent permitted by the
Credit



                                      -4-
<PAGE>   135

Agreement;

         (d) promptly cause all Revenue Equipment owned by such Grantor which,
under applicable law, is required to be registered, to be properly registered in
the name of such Grantor, and cause all Revenue Equipment, the ownership of
which, under applicable law, is evidenced by a certificate of title to be
properly titled in the name of such Grantor, and to have the Agent's interest in
such Revenue Equipment properly noted on the certificate of title with respect
thereof (it being agreed that a Grantor will not be in default under this
provision if such Grantor is diligently pursuing the process, as applicable, of
causing such Revenue Equipment to be registered in such Grantor's name or to be
titled in such Grantor's name or to have the Agent's interest noted on such
certificate of title, provided, however, that with respect to any newly acquired
Revenue Equipment if the process is not completed within 120 days after such
Grantor's acquisition of the applicable unit of Revenue Equipment, such unit of
Revenue Equipment shall not be counted in determining the Borrowing Base until
such process is completed). Until the Agent exercises remedies under this
Security Agreement, the certificates of title with respect to Revenue Equipment
owned by each Grantor shall be maintained by the Custodians at one of the
addresses referenced on Schedule 2.17 of the Credit Agreement as the location of
such certificates of title.

         4.3.  Insurance.

         (a) Each Grantor shall, at its own expense, maintain, or cause to be
maintained, insurance with respect to the Revenue Equipment owned by such
Grantor in such amounts, against such risks, in such form, and with such
insurers, as the Credit Agreement requires. Further, such Grantor shall, at the
request of the Agent, duly deliver certificates of loss casualty insurance to
the Agent showing the Agent as loss payee and additional insured as its
interests may appear.

         (b) During the continuance of any Event of Default, all loss casualty
insurance payments in respect of such Revenue Equipment shall be paid to and
applied by the Agent as specified in Section 6.

         4.4. Accounts. Each Grantor shall keep its chief place of business and
chief executive office and the office where it keeps the instruments, chattel
paper, or contracts representing Accounts and the records concerning the
Accounts at the location therefor specified in Section 3.2 or, upon 30 days'
prior written notice to the Agent, at such other locations in a jurisdiction
where all actions required by Section 4.1 shall have been taken with respect to
the Accounts. Each Grantor will hold and preserve such instruments, chattel
paper, contracts, and records and will permit representatives of the Agent at
any time during normal business hours to inspect and copy them.

         4.5. Liability Under Contracts. Notwithstanding anything in this
Security


                                      -5-
<PAGE>   136


Agreement to the contrary, (a) the execution of this Security Agreement
shall not release any Grantor from its obligations and duties under the
contracts and agreements included in the Collateral to the extent set forth
therein, (b) the exercise by the Agent of any of its rights hereunder shall not
release any Grantor from any of its duties or obligations under the contracts
and agreements included in the Collateral, and (c) neither the Agent nor any
Bank shall have any obligation or liability under the contracts and agreements
included in the Collateral by reason of the execution and delivery of this
Security Agreement, nor shall the Agent or any Bank be obligated to perform any
of the obligations or duties of any Grantor thereunder or to take any action to
collect or enforce any claim for payment assigned hereunder.

         4.6.  Pledged Shares.

         (a) Following any Grantor's acquisition of any Pledged Shares, such
Grantor shall deliver or cause to be delivered to the Agent all certificates
evidencing such Pledged Shares, accompanied by duly executed instruments of
transfer or assignment in blank, with signatures appropriately guaranteed, and
accompanied in each case by any required transfer tax stamps, all in form and
substance reasonably satisfactory to the Agent.

         (b) At any time during the continuation of an Event of Default, the
Agent may from time to time in its sole discretion, cause any or all of the
Pledged Shares to be transferred of record into the name of the Agent or a
nominee. Each Grantor will promptly give to the Agent copies of any notices and
other communications received by it with respect to Pledged Shares registered in
the name of such Grantor, and the Agent will promptly give such Grantor copies
of any notices and other communications received by the Agent with respect to
Pledged Shares registered in the name of the Agent or a nominee.

         (c) Provided that no Event of Default shall be continuing, each Grantor
shall have the right, from time to time, to vote and to give consents,
ratifications and waivers with respect to the Pledged Shares, and the Agent
shall, upon receiving a written request from such Grantor, which request shall
be deemed to be a representation and warranty by such Grantor that no Event of
Default is continuing, deliver to such Grantor or as specified in such request
such proxies, powers of attorney, consents, ratifications and waivers in respect
of any Pledged Shares which are registered in the name of the Agent or a nominee
as shall be specified in such request and be in form and substance satisfactory
to the Agent.

         (d) While an Event of Default shall be continuing, all rights of any
Grantor to exercise the voting and other consensual rights which it would
otherwise be entitled to exercise pursuant to paragraph (c) above with respect
to the Pledged Shares shall end upon notice from the Agent to such Grantor and
thereafter the Agent shall have the right to the extent permitted by law for so
long as such Event of Default continues, and such



                                      -6-
<PAGE>   137


Grantor shall take all such action as may be necessary or appropriate to give
effect to such right, to vote and to give consents, ratifications and waivers,
and take any other action with respect to such Pledged Shares with the same
force and effect as if the Agent were the absolute and sole owner thereof.

         (e) While an Event of Default shall be continuing, the Agent shall be
entitled to receive and retain as Collateral all dividends and distributions
made in respect of the Pledged Shares, and shall deposit all cash dividends into
the Collateral Account described in Section 4.7 hereof. Any such dividends or
distributions on account of Pledged Shares shall, if received by any Grantor, be
received in trust for the benefit of the Agent, be segregated from the other
property or funds of such Grantor, and be forthwith delivered to the Agent as
Collateral in the same form as so received (with any necessary endorsement).

         4.7.  Collateral Account.

         (a) There is hereby established with the Agent a cash collateral
account (the "Collateral Account") in the name and under the control of the
Agent into which there shall be deposited from time to time the cash proceeds of
the Collateral required to be delivered to the Agent pursuant to any provision
of this Agreement. Any income received by the Agent with respect to the balance
from time to time of the Collateral Account, including any interest or capital
gains on Liquid Investments, shall remain, or be deposited, in the Collateral
Account. All right, title and interest in and to the cash amounts on deposit
from time to time in the Collateral Account together with any Liquid Investments
from time to time made pursuant to paragraph (c) of this Section shall vest in
the Agent, shall constitute part of the Collateral hereunder and shall not
constitute payment of the Secured Obligations until applied thereto as
hereinafter provided.

         (b) At any time during the continuation of an Event of Default, the
Agent shall, if so instructed by the Majority Banks, apply or cause to be
applied (subject to collection) any or all of the balance from time to time of
the Collateral Account in the manner specified in Section 6.

         (c) Amounts on deposit in the Collateral Account shall be invested and
re-invested from time to time in such Liquid Investments as the Borrower shall
determine on behalf of the Grantor which deposited such amounts, which Liquid
Investments shall be held in the name and be under the control of the Agent,
provided that, at any time during the continuation of an Event of Default, the
Agent shall, if instructed by the Majority Banks, liquidate any such Liquid
Investments and apply or cause to be applied the proceeds thereof to the payment
of the Secured Obligations in the manner specified in Section 6. In order to
provide the Agent, for the benefit of the Banks, with a perfected security
interest therein, each Liquid Investment shall be either:



                                      -7-
<PAGE>   138


                  (i) evidenced by negotiable certificates or instruments, or if
         non-negotiable then issued in the name of the Agent, which (together
         with any appropriate instruments of transfer) are delivered to, and
         held by, the Agent or an agent thereof (which shall not be the Grantor
         or any of its Affiliates) in the State of Texas; or

                  (ii) in book-entry form and issued by the United States and
         subject to pledge under applicable state law and treasury regulations
         and as to which (in the opinion of counsel to the Agent) appropriate
         measures shall have been taken for perfection of the security
         interests.

         4.8. Transfer of Certain Collateral; Release of Certain Security
Interest. Each Grantor agrees that it shall not sell, assign, or otherwise
dispose of any Collateral other than Revenue Equipment sold in the ordinary
course of such Grantor's business and in accordance with the terms of the Credit
Agreement without the prior written consent of the Agent and the Majority Banks.
The Agent shall promptly, at a Grantor's expense, execute and deliver all
further instruments and documents, and take all further action that such Grantor
may reasonably request in order to release its security interest in any
Collateral which is disposed of in accordance with the terms of this Security
Agreement.

         4.9. Release of Security Interest in Revenue Equipment. (a) Each
Grantor shall be entitled to sell its Revenue Equipment in the ordinary course
of business prior to the occurrence of any Default and in accordance with the
terms of the Credit Agreement. In connection with any such sale, the Agent
agrees for its benefit and the benefit of the Banks that the lien of the Agent
recorded on any certificate of title with respect to any Revenue Equipment to be
sold may be released by the Agent's custodians (the "Custodians") pursuant to a
custodial agreement substantially in the form attached hereto as Annex 5
("Custodial Agreement"), with a power of attorney, effective for a period of one
calendar quarter (or the remaining portion thereof), which shall authorize the
Custodians to execute, on behalf of the Agent, all documents and instruments
necessary to release the security interest granted hereunder with respect to the
Revenue Equipment to be sold or transferred, subject to the limitations set
forth in the Custodial Agreement and such power of attorney. Upon the occurrence
of any Default under the Credit Agreement, the Agent may revoke any then
outstanding power of attorney provided in accordance with this Section, by
giving notice of such revocation to the Custodians, the Borrower and the
Grantors. Upon the resignation of any individual holding a power of attorney
hereunder, the Agent may designate an agent (whether or not such agent is an
employee of the Borrower or any of its Subsidiaries) to hold a power of
attorney, and such agent may enter onto any premises where any Grantor retains
certificates of title on behalf of the Agent for the purpose of fulfilling such
agent's obligations to the Agent under said power of attorney.

         (b) At the request of the Agent, each Grantor shall provide the Agent
with a



                                      -8-
<PAGE>   139


report listing Revenue Equipment owned by such Grantor as of the end of the most
recent fiscal period.

         Section 5. Remedies. If any Event of Default shall have occurred and be
continuing:

         5.1. UCC Remedies.

         (a) To the extent permitted by law, and in the case of Accounts, the
Agent may exercise in respect of the Collateral, in addition to other rights and
remedies provided for in this Security Agreement or otherwise available to it,
all the rights and remedies of a secured party under the UCC (whether or not the
UCC applies to the affected Collateral).

         (b) All payments received by any Grantor under or in connection with or
in respect of the Collateral shall be deposited with the Agent.

         5.2. Assembly of Collateral. The Agent may require each Grantor to, at
such Grantor's expense, promptly assemble all or part of the Collateral in
Little Rock, Arkansas; Springfield, Illinois; Atlanta, Georgia; Dallas, Texas;
Los Angeles, California; Denver, Colorado; Salt Lake City, Utah; Dayton, Ohio;
Cherryville, North Carolina; or such other cities as such Grantor and the Agent
may agree at such time; and make it available to the Agent at a place in each
such city to be designated by the Agent which is reasonably convenient to both
parties. The Agent may occupy any premises owned or leased by any Grantor where
the Collateral or any part thereof is assembled for a reasonable period in order
to effectuate its rights and remedies hereunder or under law, without obligation
to such Grantor in respect of such occupation.

         5.3. Sale of Collateral. The Agent may sell all or part of the
Collateral at a public or private sale, at any of the Agent's offices or
elsewhere, for cash, on credit, or for future delivery, and upon such other
terms as the Agent may deem commercially reasonable. Each Grantor agrees that to
the extent permitted by law such sales may be made without notice. If notice is
required by law, such Grantor hereby deems 10 days advance notice of the time
and place of any public sale or the time after which any private sale is to be
made reasonable notification, recognizing that if the Collateral is perishable
or threatens to decline speedily in value or is of a type customarily sold on a
recognized market shorter notice may be reasonable. The Agent shall not be
obligated to make any sale of Collateral regardless of notice of sale having
been given. The Agent may adjourn any public or private sale from time to time
by announcement at the time and place fixed therefor, and such sale may, without
further notice, be made at the time and place to which it was so adjourned.

         5.4. Contract Rights. The Agent may exercise any rights and remedies of
each Grantor under or in connection with the instruments, chattel paper, or
contracts which



                                      -9-
<PAGE>   140


represent Accounts, or otherwise relate to the Collateral, including, without
limitation, any rights of such Grantor to demand or otherwise require payment of
any amount under, or performance of any provisions of, the instruments, chattel
paper, or contracts which represent Accounts.

         5.5.  Accounts.

         (a) The Agent may, or may direct any Grantor to, take any action the
Agent deems necessary or advisable to enforce collection of the Accounts
including, without limitation, notifying the account debtors or obligors under
any Accounts of the assignment of such Accounts to the Agent and directing such
account debtors or obligors to make payment of all amounts due or to become due
directly to the Agent. Upon such notification and direction, and at the expense
of each Grantor, the Agent may enforce collection of any such Accounts, and
adjust, settle, or compromise the amount or payment thereof in the same manner
and to the same extent as such Grantor might have done.

         (b) After receipt by any Grantor of the notice referred to in paragraph
(a) above, all amounts and proceeds (including instruments) received by such
Grantor in respect of the Accounts shall be received in trust for the benefit of
the Agent hereunder, shall be segregated from other funds of such Grantor, and
shall promptly be paid over to the Agent in the same form as so received (with
any necessary indorsement) to be held as Collateral. No Grantor shall adjust,
settle, or compromise the amount or payment of any receivable, or release wholly
or partly any account debtor or obligor thereof, or allow any credit or discount
thereon other than in the ordinary course of business and consistent with past
practices.

         5.6.  Pledged Shares.

         (a) The Agent is authorized in connection with any sale of Pledged
Shares (i) to restrict the prospective bidders on or purchasers of any of the
Pledged Shares to a limited number of sophisticated investors who will represent
and agree that they are purchasing for their own account for investment and not
with a view to the distribution or sale of any such Collateral, (ii) to cause to
be placed on certificates for any or all of the Pledged Shares a legend to the
effect that such security has not been registered under the Securities Act of
1933 ("Securities Act") and may not be disposed of in violation of the
provisions of the Securities Act, and (iii) to impose such other limitations or
conditions in connection with any such sale as the Agent reasonably deems
necessary or advisable in order to comply with the Securities Act or any other
law or regulation.

         (b) If the Agent shall determine to exercise its right to sell all or
any of the Pledged Shares and if in the opinion of counsel for the Agent it is
necessary, or if in the opinion of the Agent it is advisable, to have the
Pledged Shares registered under the provisions of the Securities Act, each
Grantor agrees, at its own expense, through the exercise of registration rights
or otherwise, (i) to use its best efforts to cause the issuer of



                                      -10-
<PAGE>   141


such Pledged Shares and its officers to execute and deliver, all such
instruments and documents, and to do or cause to be done all other such acts and
things, through the exercise of registration rights or otherwise, as may be
necessary or, in the opinion of the Agent, advisable to register such securities
under the provisions of the Securities Act and to cause the registration
statement relating thereto to become effective and to remain effective for such
period as prospectuses are required by law to be furnished, and to make or cause
to be made all amendments and supplements thereto and to the related prospectus
which, in the opinion of the Agent, are necessary or advisable, all in
conformity with the requirements of the Securities Act and the rules and
regulations of the Securities and Exchange Commission thereunder, (ii) to use
its best efforts to cause the issuer of such Pledged Shares to agree to make,
and to make available to its security holders as soon as practicable, an earning
statement (which need not be audited) covering a period of at least 12 months,
beginning with the first month after the effective date of any such registration
statement, which earning statement will satisfy the provisions of Section 11(a)
of the Securities Act, (iii) to use its best efforts to qualify such securities
under state Blue Sky or securities laws and to obtain the approval of any
governmental authorities for the sale of such securities, as requested by the
Agent, and (iv) to indemnify and hold harmless and use its best efforts to cause
the issuer of such Pledged Shares to indemnify and hold harmless the Agent, and
any underwriters (and any Person controlling any of the foregoing) from and
against any loss, liability, claim, damage and expense (and reasonable counsel
fees incurred in connection therewith) under the Securities Act or otherwise
insofar as such loss, liability, claim, damage or expense arises out of or is
based upon any untrue statement or alleged untrue statement of a material fact
contained in such registration statement or prospectus or in any preliminary
prospectus or any amendment or supplement thereto, or arises out of or is based
upon any omission or alleged omission to state therein a material fact required
to be stated or necessary to make the statements therein not misleading, such
indemnification to remain operative regardless of any investigation made by or
on behalf of the Secured Parties or any underwriters (or any person controlling
any of the foregoing); provided that no Grantor shall be liable in any case to
the extent that any such loss, liability, claim, damage or expense arises out of
or is based on an untrue statement or alleged untrue statement or an omission
with written information furnished to such corporation by the Agent or any
underwriter expressly for use in such registration statement or prospectus. The
rights of the Agent under this subsection (b) are in addition to and not in
limitation of the rights of the Agent as assignee of any registration rights
included in the Collateral.

         (c) Undertakings to File Reports. If the Agent shall determine to
exercise its right to sell all or any of the Pledged Shares pursuant to Rule 144
of the General Rules and Regulations of the Securities Act ("Rule 144"), at the
request of the Agent, each Grantor shall exercise best efforts to cause the
issuer of such Pledged Shares to file, on a timely basis, all annual quarterly
and other reports required to be filed by it under Sections 13 and 15(d) of the
Exchange Act, and the rules and regulations of the Securities and Exchange
Commission thereunder, as amended from time to time. In addition, at the



                                      -11-
<PAGE>   142


request of the Agent, each Grantor shall exercise best efforts to cause the
issuer of such Pledged Shares to cooperate with the Agent so as to enable such
sales to be made in accordance with applicable laws, rules, and regulations and
the requirements of the broker through which the sales are proposed to be
executed, and shall, upon request and assuming that the requirements of Rule 144
have been complied with, furnish at such Grantor's expense an opinion of counsel
to the issuer of such Pledged Shares that the proposed sale is in compliance
with Rule 144.

         Section 6. Application of Collateral. The proceeds of any sale, or
other realization upon all or any part of the Collateral pledged by any Grantor
shall be applied by the Agent in the following order:

         first, to payment of the expenses of such sale or other realization,
including reasonable compensation to the Agent and its agents and counsel, and
all expenses, liabilities and advances incurred or made by the Agent in
connection therewith, and to the ratable payment of any other unreimbursed
expenses for which the Agent or any Bank is to be reimbursed pursuant to Section
9.4 of the Credit Agreement;

         second, to the ratable payment of accrued but unpaid interest on the
Secured Obligations of such Grantor;

         third, to the ratable payment of unpaid principal of the Secured
Obligations of such Grantor;

         fourth, to cash secure the Secured Obligations of such Grantor relating
to the Letter of Credit Exposure by depositing necessary amounts in the
Collateral Account; and

         fifth, to the ratable payment of all other amounts payable by such
Grantor under the Guaranty and this Security Agreement.

         Any surplus of such cash or cash proceeds held by the Agent and
remaining after payment in full of all the Secured Obligations of such Grantor
shall be paid over to such Grantor or to whomever may be lawfully entitled to
receive such surplus.

         Section 7.  Agent as Attorney-in-Fact for Grantor.

         7.1. Attorney-In-Fact. Each Grantor hereby irrevocably appoints the
Agent as such Grantor's attorney-in-fact, with full authority to act for such
Grantor and in the name of such Grantor to, in the Agent's discretion:

         (a) filing one or more financing or continuation statements, and
amendments thereto, relative to all or any part of the Collateral without the
signature of such Grantor where permitted by law;



                                      -12-
<PAGE>   143

         (b) to obtain and adjust insurance required as pursuant to Section 5.3
to the extent such Grantor has failed to provide such insurance;

         (c) to receive, indorse, and collect any drafts or other instruments,
documents, and chattel paper which are part of the Collateral pledged by such
Grantor; and

         (d) during the continuance of any Event of Default, to ask, demand,
collect, sue for, recover, compromise, receive, and give acquittance and
receipts for moneys due and to become due under or in respect of any of the
Collateral pledged by such Grantor and to file any claims or take any action or
institute any proceedings which the Agent may deem necessary or desirable for
the collection of any of such Collateral or otherwise to enforce the rights of
the Agent with respect to any of such Collateral.

         The power of attorney granted hereby is coupled with an interest and is
irrevocable.

         7.2. Agent Performance. If any Grantor fails to perform any covenant
contained herein, the Agent may itself perform, or cause performance of, such
covenant, and such Grantor shall pay for the expenses of the Agent incurred in
connection therewith in accordance with Section 9.1.

         7.3. Agent's Duties. The powers conferred on the Agent under this
Security Agreement are solely to protect its interest in the Collateral and
shall not impose any duty upon it to exercise any such powers. Except for the
safe custody of any Collateral in its possession and the accounting for monies
actually received by it hereunder, the Agent shall have no duty as to any
Collateral or as to the taking of any necessary steps to preserve rights against
prior parties or any other rights pertaining to any Collateral.

         Section 8.  Miscellaneous.

         8.1. Expenses. Each Grantor will upon demand pay to the Agent the
amount of any reasonable expenses, including the reasonable fees and
disbursements of its counsel and of any experts and agents, which the Agent may
incur in connection with (a) the custody, preservation, use, or operation of, or
the sale, collection, or other realization of, any of the Collateral, (b) the
exercise or enforcement of any of the rights of the Agent or the Banks
hereunder, and (c) the failure by such Grantor to perform or observe any of the
provisions hereof.

         8.2. Amendments; Etc. No waiver of any provision of this Security
Agreement nor consent to any departure by any Grantor herefrom shall be
effective unless the same shall be in writing and signed by the Agent (with the
consent of such Banks as may be required pursuant to the Credit Agreement) and
then such waiver or consent shall be



                                      -13-
<PAGE>   144


effective only in the specific instance and for the specific purpose for which
given. Any amendment of this Security Agreement (except as provided in the
foregoing sentence) shall be in writing and signed by all of the parties hereto;
provided, however, that any Subsidiary of the Borrower that may hereafter become
a Guarantor in accordance with the provisions of the Credit Agreement and the
Guaranty may become a party to this Security Agreement by executing an Accession
Agreement ("Accession Agreement") in the form attached as Annex 2 to the
Guaranty, and each Grantor and the Agent hereby agrees that upon such
Guarantor's execution of such Accession Agreement, this Security Agreement shall
be deemed to have been amended to make such Person a Grantor hereunder for all
purposes and a party hereto and no signature is required on behalf of the other
Grantors or the Agent to make such an amendment to this Security Agreement
effective.

         8.3. Addresses for Notices. All notices and other communications
provided for hereunder shall be made as provided in the Credit Agreement (i) in
the case of the Agent, at the address for the Agent provided in the Credit
Agreement and (ii) in the case of any Grantor, to such Grantor at the address
for such Grantor set forth on Annex 1 attached to the Guaranty or in the
Accession Agreement executed by such Grantor. All such notices and other
communications shall be effective as provided in the Credit Agreement.

         8.4. Continuing Security Interest; Transfer of Interest. This Security
Agreement shall create a continuing security interest in the Collateral and
shall (a) remain in full force and effect until payment in full and termination
of the Secured Obligations, (b) be binding upon each Grantor, its successors,
and assigns, and (c) inure, together with the rights and remedies of the Agent
hereunder, to the benefit of the Agent, the Banks, and their respective
successors, transferees, and assigns. Without limiting the generality of the
foregoing clause, when any Bank assigns or otherwise transfers any interest held
by it under the Credit Agreement or other Credit Document to any other Person
pursuant to the terms of the Credit Agreement or other Credit Document, that
other Person shall thereupon become vested with all the benefits held by such
Bank under this Security Agreement. Upon the payment in full and termination of
the Secured Obligations, the security interest granted hereby shall terminate
and all rights to the Collateral pledged by any Grantor shall revert to such
Grantor to the extent such Collateral shall not have been sold or otherwise
applied pursuant to the terms hereof. Upon any such termination, the Agent will,
at each Grantor's expense, execute and deliver to such Grantor such documents as
such Grantor shall reasonably request and take any other actions reasonably
requested to evidence or effect such termination.

         8.5. Concerning the Agent. The provisions of Article VIII of the Credit
Agreement shall inure to the benefit of the Agent in respect of this Security
Agreement and shall be binding upon the parties to the Credit Agreement in such
respect. In furtherance and not in derogation of the rights, privileges and
immunities of the Agent in its capacity as Agent hereunder:



                                      -14-
<PAGE>   145


         (a) The Agent is authorized to take all such action as is provided to
be taken by it as Agent hereunder and all other action reasonably incidental
thereto. As to any matters not expressly provided for herein (including, without
limitation, the timing and methods of realization upon the Collateral) the Agent
shall act or refrain from acting in accordance with written instructions from
the Majority Banks or, in the absence of such instructions, in accordance with
its discretion.

         (b) The Agent shall not be responsible for the existence, genuineness
or value of any of the Collateral or for the validity, perfection, priority or
enforceability of the security interests granted hereby in any of the
Collateral, whether impaired by operation of law or by reason of any action or
omission to act on its part hereunder. The Agent shall have no duty to ascertain
or inquire as to the performance or observance of any of the terms of this
Security Agreement by the Grantors.

         8.6. Choice of Law. This Security Agreement shall be governed by and
construed and enforced in accordance with the laws of the state of Texas, except
to the extent that the validity or perfection of the security interests
hereunder, or remedies hereunder, in respect of any particular Collateral are
governed by the laws of a jurisdiction other than the state of Texas.

                     [REMAINDER OF PAGE INTENTIONALLY BLANK]



                                      -15-
<PAGE>   146


         The parties hereto have caused this Security Agreement to be duly
executed as of the date first above written.

                                GRANTORS:

                                ABF CARTAGE, INC.
                                ABF FARMS, INC.
                                ABF FREIGHT SYSTEM (B.C.) LTD.
                                ABF FREIGHT SYSTEM CANADA, LTD.
                                ABF FREIGHT SYSTEM, INC.
                                AGILE FREIGHT SYSTEM, INC.
                                AGRICULTURAL EXPRESS OF AMERICA, INC.
                                BEST SERVICE CORP.
                                CAROTRANS INTERNATIONAL, INC.
                                CLIPPER EXXPRESS COMPANY
                                DATA-TRONICS CORP.
                                FLEETNET AMERICA, INC.
                                G.I. TRUCKING COMPANY
                                LAND-MARINE CARGO, INC.
                                TRANSPORT REALTY, INC.



                                -----------------------------------
                                David E. Loeffler
                                Authorized Agent



                                      -16-
<PAGE>   147
                                     ANNEX 1
                        to Guarantors Security Agreement



                       NAMES AND ADDRESSES OF EACH GRANTOR
                       WHERE RECORDS FOR ACCOUNTS ARE KEPT

ABF Cartage, Inc.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

ABF Farms, Inc.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

ABF Freight System (B.C.), Ltd.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

ABF Freight System Canada, Ltd.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

ABF Freight System, Inc.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

Agile Freight System, Inc.
15700 West 103rd Street
Lemont, Illinois 60439

Agricultural Express of America, Inc.
15700 West 103rd Street
Lemont, Illinois 60434

Best Service Corp.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

CaroTrans International, Inc.
15700 West 103rd Street
Lemont, Illinois 60434



<PAGE>   148

Clipper Exxpress Company
15700 West 103rd Street
Lemont, Illinois 60439

Data-Tronics Corp.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

FleetNet America, Inc.
300 Commerce Drive
Cherryville, North Carolina 28021

G.I. Trucking Company
14727 Alondra Boulevard
La Mirada, California 90638

Land-Marine Cargo, Inc.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

Transport Realty, Inc.
3801 Old Greenwood Road
Fort Smith, Arkansas 72903



                                       -2-
<PAGE>   149
                                     ANNEX 2
                        to Guarantors Security Agreement


                               FINANCING STATEMENT


1. The name and address of the DEBTOR is:





2. The name and address of the SECURED PARTY is:

         Societe Generale, Southwest Agency
         4800 Trammell Crow Center
         2001 Ross Avenue
         Dallas, Texas 75201

3. The federal tax I.D. number of the Debtor is: ___________________.

4. This Financing Statement covers the following assets or types of Collateral:

                  (a) Revenue Equipment. All now owned or hereafter acquired
         trucks, tractors, trailers and city tractors, and all accessories and
         parts therefor or attached thereto;

                  (b) Accounts. All now owned or hereafter acquired accounts and
         all rights to payment owing or to be owing to the Debtor, wherever the
         records for such accounts and rights to payment are held, including all
         instruments and chattel paper, wherever located, that represent any
         right of the Debtor to payment for services rendered, whether or not it
         has been earned by performance;

                  (c) Stock. All shares of capital stock of each Subsidiary of
         the Debtor;

                  (d) Records. All now owned or hereafter acquired ledger
         sheets, files, records, computer databases and software and documents
         relating to the foregoing Collateral; and

                  (e) Proceeds. All proceeds of the foregoing Collateral and, to
         the extent not otherwise included, all payments under any insurance,
         indemnity, warranty, or guaranty of or for the foregoing Collateral.

                                     DEBTOR:

<PAGE>   150

                                     --------------------------------------


                                     --------------------------------------
                                     By:
                                         ---------------------------------
                                     Title:
                                            ------------------------------



                                       -2-
<PAGE>   151
                                     ANNEX 3
                        to Guarantors Security Agreement


                              UCC FILING LOCATIONS


ABF Cartage, Inc.

         Arkansas Secretary of State
         Sebastian County, Arkansas
         Hawaii Secretary of State

ABF Farms, Inc.

         Arkansas Secretary of State
         Sebastian County, Arkansas

ABF Freight System (B.C.), Ltd.

         Arkansas Secretary of State
         Sebastian County, Arkansas
         Illinois Secretary of State

ABF Freight System Canada, Ltd.

         Arkansas Secretary of State
         Sebastian County, Arkansas
         Illinois Secretary of State

ABF Freight System, Inc.

         Alabama Secretary of State
         Arizona Secretary of State
         Arkansas Secretary of State
         Sebastian County, Arkansas
         Garland County, Arkansas
         Craighead County, Arkansas
         Drew County, Arkansas
         Jefferson County, Arkansas
         Washington County, Arkansas
         Pulaski County, Arkansas
         California Secretary of State
         Colorado Secretary of State
         Connecticut Secretary of State



<PAGE>   152


         Florida Secretary of State
         Clarke County, Georgia
         Douglas County, Georgia
         Gordon County, Georgia
         Chatham County, Georgia
         Dougherty County, Georgia
         Jackson County, Georgia
         Fulton County, Georgia
         Clayton County, Georgia
         DeKalb County, Georgia
         Jeff Davis County, Georgia
         Bibb County, Georgia
         Henry County, Georgia
         Hawaii Secretary of State
         Idaho Secretary of State
         Illinois Secretary of State
         Indiana Secretary of State
         Iowa Secretary of State
         Kansas Secretary of State
         Kentucky Secretary of State
         Jefferson County, Kentucky
         Rapides Parish, Louisiana
         Jefferson Parish, Louisiana
         Caddo Parish, Louisiana
         Maryland Secretary of State
         Baltimore City, Maryland
         Howard County, Maryland
         Prince George County, Maryland
         Massachusetts Secretary of State
         Plymouth County, Massachusetts
         Middlesex County, Massachusetts
         Bristol County, Massachusetts
         Worcester County, Massachusetts
         Michigan Secretary of State
         Minnesota Secretary of State
         Mississippi Secretary of State
         Warren County, Mississippi
         Washington County, Mississippi
         Hinds County, Mississippi
         Missouri Secretary of State
         Jackson County, Missouri
         Cape Girardeau, Missouri
         Independent City of St. Louis, Missouri



                                       -2-
<PAGE>   153


         Greene County, Missouri
         Buchanan County, Missouri
         Nebraska Secretary of State
         Nevada Secretary of State
         New Hampshire Secretary of State
         New Jersey Secretary of State
         New Mexico Secretary of State
         New York Secretary of State
         Albany County, New York
         Kings County, New York
         Erie County, New York
         Suffolk County, New York
         Monroe County, New York
         Onondaga County, New York
         North Carolina Secretary of State
         Buncombe County, North Carolina
         Mecklenberg County, North Carolina
         Gaston County, North Carolina
         Catawba County, North Carolina
         Durham County, North Carolina
         Henderson County, North Carolina
         Guilford County, North Carolina
         Cumberland County, North Carolina
         Forsyth County, North Carolina
         Union County, North Carolina
         Nash County, North Carolina
         Wake County, North Carolina
         Oregon Secretary of State
         Ohio Secretary of State
         Summit County, Ohio
         Franklin County, Ohio
         Lucas County, Ohio
         Butler County, Ohio
         Hamilton County, Ohio
         Cuyahoga County, Ohio
         Montgomery County, Ohio
         Portage County, Ohio
         Belmont County, Ohio
         Trumbull County, Ohio
         Pennsylvania Secretary of State
         Northumberland County, Pennsylvania
         Allegheny County, Pennsylvania
         Berks County, Pennsylvania



                                       -3-
<PAGE>   154


         Delaware County, Pennsylvania
         Cumberland County, Pennsylvania
         Erie County, Pennsylvania
         Lehigh County, Pennsylvania
         Philadelphia County, Pennsylvania
         Luzerne County, Pennsylvania
         York County, Pennsylvania
         Oklahoma Secretary of State
         Rhode Island Secretary of State
         South Carolina Secretary of State
         Tennessee Secretary of State
         Texas Secretary of State
         Utah Secretary of State
         Vermont Secretary of State
         Chittenden County, Vermont
         Virginia Secretary of State
         Independent City of Lynchburg, Virginia
         Independent City of Norfolk, Virginia
         Martinsville County, Virginia
         Prince William County, Virginia
         Chesapeake County, Virginia
         Independent City of Richmond, Virginia
         Washington Secretary of State
         Wisconsin Secretary of State
         West Virginia Secretary of State

Agile Freight System, Inc.

         California Secretary of State

Agricultural Express of America, Inc.

         Illinois Secretary of State
         California Secretary of State

Best Service Corp.

         Arkansas Secretary of State
         Sebastian County, Arkansas
CaroTrans International, Inc.

         California Secretary of State
         Florida Secretary of State



                                       -4-
<PAGE>   155


         Georgia Secretary of State
         DeKalb County, Georgia
         Illinois Secretary of State
         Jefferson Parish, Louisiana
         Maryland Secretary of State
         Independent City of Baltimore, Maryland
         New Jersey Secretary of State
         North Carolina Secretary of State
         Gaston County, North Carolina
         Mecklenburg County, North Carolina
         South Carolina Secretary of State
         Texas Secretary of State
         Virginia Secretary of State
         Virginia Beach County, Virginia

Clipper Exxpress Company

         Illinois Secretary of State
         Nevada Secretary of State
         Ohio Secretary of State

Data-Tronics Corp.

         Arkansas Secretary of State
         Sebastian County, Arkansas

FleetNet America, Inc.
         North Carolina Secretary of State
         Gaston County, North Carolina

G.I. Trucking Company

         Arizona Secretary of State
         California Secretary of State
         Los Angeles County, California
         Colorado Secretary of State
         Oklahoma Secretary of State
         Texas Secretary of State
         Utah Secretary of State
         Washington Secretary of State

Land-Marine Cargo, Inc.



                                       -5-
<PAGE>   156


         Illinois Secretary of State

Transport Realty, Inc.

         Arkansas Secretary of State
         Sebastian County, Arkansas



                                       -6-
<PAGE>   157
                                     ANNEX 4
                        to Guarantors Security Agreement

                               CUSTODIAL AGREEMENT


         This Custodial Agreement ("Agreement") dated as of ______________, is
among the individuals signatory hereto as Custodians below, each such individual
residing at the address set forth below his or her name below (such individuals
each herein called the "Custodian"), and Societe Generale, Southwest Agency, as
Administrative Agent (the "Agent") under the Credit Agreement (as amended or
otherwise modified from time to time, the "Credit Agreement") dated as of June
12, 1998 among Arkansas Best Corporation, a Delaware corporation (the
"Borrower"), the lenders parties thereto (the "Banks"), Bank of America National
Trust and Savings Association and Wells Fargo Bank (Texas), N.A., as
Co-Documentation Agents, and the Agent. All capitalized terms defined in the
Credit Agreement and used herein without definition shall have the same meanings
herein as therein defined.

         WHEREAS, the Agent has requested the Custodian to act on the Agent's
behalf to protect and preserve the Agent's rights, for the benefit of the Banks,
with respect to certain Revenue Equipment pledged as collateral and securing the
obligations of the Borrower and each Guarantor to the Banks; and

         WHEREAS, the Custodian has agreed so to act on behalf of the Agent
under the terms of this Agreement;

         NOW, THEREFORE, in consideration of the premises and intending to be
legally bound hereby, the parties hereto agree as follows:

         (a) As described in the Borrower Security Agreement and the Guarantors
Security Agreement, and subject to the limitations described therein, any
Grantor (as defined in such Security Agreements) may sell or transfer Revenue
Equipment constituting Collateral (as defined in such Security Agreements) in
the ordinary course of business. Due to the difficulty of administering such
sales if the Agent were to hold the certificates of title with respect to all
Revenue Equipment at its offices in Dallas, Texas, the Agent hereby designates
each Custodian, as agent for the Agent, and by this Agreement authorizes such
Custodian to hold such certificates of title for the Agent at the offices
specified on Schedule 2.17 to the Credit Agreement. By execution hereof, each
Custodian agrees that he or she shall act as Custodian for the Agent as herein
provided and shall not take any action to release the Agent's lien on any of
such certificates of title except as may from time to time be necessary to
permit ordinary course of business sales of Revenue Equipment prior to the
occurrence of a Default under the Credit Agreement in



<PAGE>   158


accordance with the terms of a power of attorney which will from time to time be
executed and delivered to such Custodian by the Agent.

         (b) The Agent and each Custodian agree that such Custodian will act in
accordance with the terms hereof on behalf of the Agent, to protect the Agent's
interest in said Revenue Equipment for which ownership is evidenced by a
certificate of title and in which the Agent has an interest. Each Custodian
shall take reasonable measures and exercise reasonable care to prevent any
Person other than any additional Custodian appointed by the Agent under the
terms of an agreement substantially similar to this Agreement, from releasing or
causing to be released the Agent's lien on any such Revenue Equipment, and will
promptly notify the Agent of any such actions of which such Custodian becomes
aware.

         (c) The Agent anticipates issuing a power of attorney substantially in
the form of the Schedule attached hereto to the Custodian on a periodic basis,
each for a limited duration, as described in Section 4.9 of the Borrower
Security Agreement and the Guarantors Security Agreement to permit the Custodian
to act on behalf of the Agent in releasing the Agent's lien on Revenue Equipment
sold in accordance with the Credit Agreement and such Security Agreements and in
supplying lienholder information to the proper governmental authorities for
title processing and licensing necessary to reflect the Agent's continuing
security interest in Revenue Equipment. Each Custodian recognizes that the power
of attorney received by him or her shall be broad to enable the release of the
Agent's lien as contemplated by the Security Agreements but nevertheless agrees
that he or she will only release liens in accordance with the terms of the
Security Agreements and this Agreement, and such Custodian is hereby authorized
to do so and to supply lienholder information. No Custodian will release or take
any action toward releasing any liens if such Custodian has reason to believe
that (a) such release would not be in compliance with the terms of the Security
Agreements or this Agreement, or (b) representations by employees, officers or
other agents of the Grantor to the effect that certain sales or transfers comply
with the terms of the Security Agreements are untrue, and such Custodian will
promptly notify the Agent thereof.

         (d) Upon the occurrence of any Default under the Credit Agreement, the
Agent may by notice to each Custodian, immediately revoke the power of attorney
in effect at such time, and upon receipt of such notice which may be by
telephone, telecopy or telex, such Custodian shall not take any further action
to release any lien until instructed otherwise by the Agent.

         (e) Any Custodian may resign as Custodian hereunder upon 14 days'
advance



                                       -2-
<PAGE>   159


written notice to the Agent and the Borrower. Without limiting any rights of the
Agent under the Credit Agreement and the Security Agreements, the Agent may
terminate any Custodian's responsibilities hereunder (a) immediately in the
event that such Custodian breaches his agreements, covenants or responsibilities
hereunder or (b) upon 14 days' written notice, without cause, with the consent
of the Borrower. Upon the resignation or termination of any Custodian, such
Custodian shall have no further rights or responsibilities hereunder and shall
immediately return to the Agent any then effective power of attorney; such
Custodian will not hold himself or herself out as having any authority as a
Custodian, and such Custodian shall notify all Persons as may be reasonably
necessary to resolve any confusion, that such individual is no longer a
Custodian hereunder.

         (f) This Agreement may be amended or waived only by a writing signed by
the Agent, the Borrower and each Custodian. This Agreement shall be construed in
accordance with and governed by the laws of the State of Texas. If any term of
this Agreement shall be held to be invalid, illegal or unenforceable, the
validity of all other terms hereof shall be in no way affected thereby, and this
Agreement shall be construed and be enforceable as if such invalid, illegal or
unenforceable term had not been included herein.


                     [REMAINDER OF PAGE INTENTIONALLY BLANK]



                                       -3-
<PAGE>   160



         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as an instrument under seal as of the date first above written.

                                     SOCIETE GENERALE, SOUTHWEST
                                     AGENCY, as Agent


                                     --------------------------------------
                                     By:
                                         ----------------------------------
                                     Title:
                                            -------------------------------


                                     CUSTODIANS:


                                     --------------------------------------
                                     Name:
                                           --------------------------------

                                     Address:
 

                                     --------------------------------------

                                     --------------------------------------
                                     Telephone:
                                                 --------------------------
                                     Telecopy:
                                                 --------------------------

         The undersigned, Arkansas Best Corporation, hereby recognizes that any
Custodian referred to above shall, as agent for the Agent, hold certificates of
title to Revenue Equipment which is subject to a Lien in favor of the Agent for
the benefit of the Banks at the office referred to in the foregoing Custodial
Agreement and, accordingly, for valuable consideration, receipt of which is
hereby acknowledged, the undersigned grants such Custodian on behalf of itself
and its Subsidiaries a continuing right to use its offices for such purpose as
may be necessary and convenient to carry out the provisions of the foregoing
Custodial Agreement.

                                     ARKANSAS BEST CORPORATION



                                     --------------------------------------
                                     By:
                                         ----------------------------------
                                     Title:
                                            -------------------------------




                                      -4-
<PAGE>   161

                         SCHEDULE TO CUSTODIAL AGREEMENT

                                POWER OF ATTORNEY

         This Power of Attorney is made the ____ day of _________, 19___ by
Societe Generale, Southwest Agency, as Administrative Agent (the "Agent") for
itself and the lenders which are or may become parties to the Credit Agreement
dated as of June 12, 1998 among Arkansas Best Corporation, such lenders, Bank of
America National Trust and Savings Association and Wells Fargo Bank (Texas),
N.A., as Co-Documentation Agents, and the Agent (as it may be amended or
otherwise modified from time to time, the "Credit Agreement").

         KNOW ALL PERSONS BY THESE PRESENTS, that the Agent does hereby
constitute and appoint ______________________________ as the Agent's true and
lawful attorney and in the name, place, and stead of the Agent to execute, on
behalf of the Agent, such documents and instruments necessary to release the
security interest or lien granted by the Grantor (as defined in the Borrower
Security Agreement and Guarantors Security Agreement referenced in the Credit
Agreement) on revenue equipment for which a certificate of title has been issued
and which designates the Agent as the secured party on the application for
certificate of title or certificate of title, as appropriate, with respect to
any revenue equipment of the Grantor the ownership of which is evidenced by a
certificate of title.

         This Power of Attorney shall expire on ___________, 19__.

         IN WITNESS WHEREOF, the Agent has caused this Power of Attorney to be
duly executed this ___ day of __________, 19__.


                                     SOCIETE GENERALE, SOUTHWEST
                                     AGENCY, as Agent


                                     --------------------------------------
                                     By:
                                         ----------------------------------
                                     Title:
                                            -------------------------------





<PAGE>   162


I attest to the fact that this is a true and
exact copy of the Original Power of Attorney

Subscribed and sworn to before me
this _____ day of __________, 199__.


- - ---------------------------------------------
Notary Public
My Commission Expires:__________






                                     -2-
<PAGE>   163
                                    EXHIBIT E


                               NOTICE OF BORROWING


                                     [Date]


Societe Generale, Southwest Agency,
as Administrative Agent under the Credit Agreement herein described
4800 Trammell Crow Center
2001 Ross Avenue
Dallas, Texas 75201

Attention:  Ms. Terri Jones and Mr. David Oldani

Ladies and Gentlemen:

The undersigned, Arkansas Best Corporation, a Delaware corporation (the
"Borrower"), refers to the Credit Agreement dated as of June 12, 1998 (as the
same may be further amended or modified from time to time, the "Credit
Agreement," the defined terms of which are used in this Notice of Borrowing
unless otherwise defined in this Notice of Borrowing) among the Borrower, the
Banks, the Co-Documentation Agents and the Agent, and hereby gives you
irrevocable notice pursuant to Section 2.2(a) of the Credit Agreement that the
undersigned hereby requests a Borrowing, and in connection with that request
sets forth below the information relating to such Borrowing (the "Proposed
Borrowing") as required by Section 2.2(a) of the Credit Agreement:


                  (a) The Business Day of the Proposed Borrowing is
         _____________, 19_____.

                  (b) The Proposed Borrowing will be a Revolving Borrowing
         composed of [Prime Rate Advances] [Eurodollar Rate Advances].

                  (c) The aggregate amount of the Proposed Borrowing is
         $____________.

                  (d) The Interest Period for each Eurodollar Rate Advance made
         as part of the Proposed Borrowing is [_____ month[s]].

The undersigned hereby certifies that the following statements are true on the
date hereof, and will be true on the date of the Proposed Borrowing:

                  (a) the representations and warranties contained in the
         Credit Agreement and Section 7 of the Guaranty and in each Security
         Agreement are correct in all

<PAGE>   164


Societe Generale, Southwest Agency
[Date]
Page 2


         material respects, before and after giving effect to the Proposed
         Borrowing and the application of the proceeds therefrom, as though
         made on the date of the Proposed Borrowing; and

                  (b) no Default has occurred and remains uncured, or would
         result from such Proposed Borrowing or from the application of the
         proceeds therefrom.

                                          Very truly yours,

                                          ARKANSAS BEST CORPORATION



                                          By:
                                             ---------------------------------
                                             David E. Loeffler
                                             Vice President, Chief Financial
                                             Officer, and Treasurer



<PAGE>   165
                                    EXHIBIT F


                      NOTICE OF CONVERSION OR CONTINUATION


                                     [Date]


Societe Generale, Southwest Agency,
as Administrative Agent under the Credit Agreement herein described
4800 Trammell Crow Center
2001 Ross Avenue
Dallas, Texas 75201

Attention:  Ms.  Terri Jones and Mr. David Oldani

Ladies and Gentlemen:

The undersigned, Arkansas Best Corporation, a Delaware corporation (the
"Borrower"), refers to the Credit Agreement dated as of June 12, 1998 (as the
same may be further amended or modified from time to time, the "Credit
Agreement," the defined terms of which are used in this Notice of Conversion or
Continuation unless otherwise defined in this Notice of Conversion or
Continuation), among the Borrower, the Banks, the Co-Documentation Agents, and
the Agent, and hereby gives you irrevocable notice pursuant to Section 2.2(b) of
the Credit Agreement that the undersigned hereby requests a Conversion or
continuation of an outstanding Borrowing, and in connection with that request
sets forth below the information relating to such Conversion or continuation
(the "Proposed Borrowing") as required by Section 2.2(b) of the Credit
Agreement:


                  (a) The Business Day of the Proposed Borrowing is
         _______________, 19 ____.

                  (b) The Proposed Borrowing will be a composed of [Prime Rate
         Advances] [Eurodollar Rate Advances].

                  (c) The aggregate amount of the Borrowing to be Converted or
         continued is $ _______ and consists of [Prime Rate Advances]
         [Eurodollar Rate Advances].

                  (d) The Proposed Borrowing consists of [a Conversion to [Prime
         Rate Advances] [Eurodollar Rate Advances]] [a continuation of [Prime
         Rate Advances] [Eurodollar Rate Advances]].



<PAGE>   166


Societe Generale, Southwest Agency
[Date]
Page 2



                  (e) The Interest Period for each Eurodollar Rate Advance made
         as part of the Proposed Borrowing is [____ month[s]].


                                            Very truly yours,

                                            ARKANSAS BEST CORPORATION


                                            By:
                                               --------------------------------
                                               David E. Loeffler
                                               Vice President, Chief Financial
                                               Officer, and Treasurer


<PAGE>   167
                                   EXHIBIT G


                           ASSIGNMENT AND ACCEPTANCE

                          Dated ________________, 19__


         Reference is made to the Credit Agreement dated as of June 12, 1998
(as the same may be further amended or modified from time to time, the "Credit
Agreement") among Arkansas Best Corporation, a Delaware corporation (the
"Borrower"), the Banks, Bank of America National Trust and Savings Association
and Wells Fargo Bank (Texas), N.A., as Co-Documentation Agents, and Societe
Generale, Southwest Agency, as Administrative Agent.  Capitalized terms not
otherwise defined in this Assignment and Acceptance shall have the meanings
assigned to them in the Credit Agreement.

         Pursuant to the terms of the Credit Agreement, ________________ wishes
to assign and delegate    1 of its rights and obligations under the Credit
Agreement.  Therefore, _________________ ("Assignor"), _______________
("Assignee"), and the Agent agree as follows:

         1.      As of the Effective Date (as defined below), the Assignor
hereby sells and assigns and delegates to the Assignee, and the Assignee hereby
purchases and assumes from the Assignor, without recourse to the Assignor and
without representation or warranty except for the representations and
warranties specifically set forth in clauses (i), (ii), and (iii) of Section 2,
a ___% interest in and to all of the Assignor's rights and obligations under
the Credit Agreement in connection with its Commitment, including, without
limitation, such percentage interest in the Assignor's Revolving Commitment and
the Advances owing to the Assignor, the participation interest in the Letter of
Credit Obligations held by the Assignor and the Term Note held by the Assignor.

         2.      The Assignor (i) represents and warrants that, prior to
executing this Assignment and Acceptance, its Revolving Commitment is
$__________, the aggregate outstanding principal amount of Revolving Advances
owed to it by the Borrower is $_____________, and its Pro Rata Share of the
Letter of Credit Exposure is $___________; (ii) represents and warrants that it
is the legal and beneficial owner of the interest being assigned by it
hereunder and that such interest is free and clear of any adverse claim; (iii)
makes no representation or warranty and assumes no responsibility with respect
to any statements, warranties, or representations made in or in connection with
the Credit Agreement or any other Credit Document or the execution, legality,
validity, enforceability, genuineness, sufficiency, or value of the Credit
Agreement or any other





- - ---------------

     (1) Specify percentage in no more than 5 decimal points.
<PAGE>   168

Credit Document or any other instrument or document furnished pursuant thereto;
(iv) makes no representation or warranty and assumes no responsibility with
respect to the financial condition of the Borrower or any Guarantor or the
performance or observance by the Borrower or any Guarantor of any of its
obligations under the Credit Agreement or any other Credit Document or any
other instrument or document furnished pursuant thereto; and (v) attaches the
Note referred to in paragraph 1 above and requests that the Agent exchange such
Note for a new Revolving Note dated  ____________, 19__ in the principal amount
of $______________ payable to the order of the Assignee [, and a new Revolving
Note dated ___________, 19__ in the principal amount of $__________, payable to
the order of Assignor].

         3.      The Assignee (i) confirms that it has received a copy of the
Credit Agreement, together with copies of the financial statements referred to
in Section 4.5 thereof and such other documents and information as it has deemed
appropriate to make its own credit analysis and decision to enter into this
Assignment and Acceptance; (ii) agrees that it will, independently and without
reliance upon the Agent, the Co-Documentation Agents, the Assignor, or any other
Bank and based on such documents and information as it shall deem appropriate at
the time, continue to make its own credit decisions in taking or not taking
action under the Credit Agreement or any other Credit Document; (iii) appoints
and authorizes the Agent to take such action as agent on its behalf and to
exercise such powers under the Credit Agreement and any other Credit Document as
are delegated to the Agent by the terms thereof, together with such powers as
are reasonably incidental thereto; (iv) agrees that it will perform in
accordance with their terms all of the obligations which by the terms of the
Credit Agreement or any other Credit Document are required to be performed by it
as a Bank; (v) specifies as its Domestic Lending Office (and address for
notices) and Eurodollar Lending Office the offices set forth beneath its name on
the signature pages hereof; (vi) attaches the forms prescribed by the Internal
Revenue Service of the United States certifying as to the Assignee's status for
purposes of determining exemption from United States withholding taxes with
respect to all payments to be made to the Assignee under the Credit Agreement
and its Notes or such other documents as are necessary to indicate that all such
payments are subject to such rates at a rate reduced by an applicable tax
treaty(2), and (vii) represents that it is an Eligible Assignee.

         4.      The effective date for this Assignment and Acceptance shall be
________________ (the "Effective Date")(3) and following the execution of this
Assignment and Acceptance, the Agent will record it.

  5.      Upon such recording, and as of the Effective Date, (i) the Assignee
shall be a _________





- - ---------------

     (2) If the Assignee is organized under the laws of a jurisdiction outside
     the United States.
     (3) See  Section 9.6.  Such date shall be at least three Business Days
     after the execution of this Assignment and Acceptance.


                                      -2-
<PAGE>   169

party to the Credit Agreement for all purposes, and, to the extent provided in
this Assignment and Acceptance, have the rights and obligations of a Bank
thereunder and (ii) the Assignor shall, to the extent provided in this
Assignment and Acceptance, relinquish its rights (other than rights against the
Borrower pursuant to Sections 2.9, 2.11(c) and 9.7 of the Credit Agreement,
which shall survive this assignment) and be released from its obligations under
the Credit Agreement.

         6.      Upon such recording, from and after the Effective Date, the
Agent shall make all payments under the Credit Agreement and the Notes in
respect of the interest assigned hereby (including, without limitation, all
payments of principal, interest, and commitment fees) to the Assignee.  The
Assignor and Assignee shall make all appropriate adjustments in payments under
the Credit Agreement and the Notes for periods prior to the Effective Date
directly between themselves.

         7.      This Assignment and Acceptance shall be governed by, and
construed and enforced in accordance with, the laws of the State of Texas.





                                      -3-
<PAGE>   170

         The parties hereto have caused this Assignment and Acceptance to be
duly executed as of the date first above written.



                                [ASSIGNOR]


                                By:
                                       ----------------------------------------
                                Name:
                                       ----------------------------------------
                                Title:
                                       ----------------------------------------

                                Address:
                                       ----------------------------------------

                                       ----------------------------------------

                                       ----------------------------------------


                                Attention:
                                         --------------------------------------
                                Telecopy:
                                         --------------------------------------
                                Telephone:
                                         --------------------------------------

                                [ASSIGNEE]


                                By:
                                       ----------------------------------------
                                Name:
                                       ----------------------------------------
                                Title:
                                       ----------------------------------------

                                Domestic Lending Office:

                                Address:
                                         --------------------------------------
 
                                         --------------------------------------

                                Attention:
                                         --------------------------------------
                                Telecopy:
                                         --------------------------------------
                                Telephone:
                                         --------------------------------------






                                      -4-
<PAGE>   171

                                Eurodollar Lending Office:

                                Address:
                                         --------------------------------------

                                         --------------------------------------

                                Attention:
                                         --------------------------------------
                                Telecopy:
                                         --------------------------------------
                                Telephone:
                                         --------------------------------------


                                SOCIETE GENERALE, SOUTHWEST AGENCY,
                                as Agent


                                By:
                                       ----------------------------------------
                                Name:
                                       ----------------------------------------
                                Title:
                                       ----------------------------------------


                                Address:    4800 Trammel Crow Center
                                            2001 Ross Avenue
                                            Dallas, Texas 75201

                                Attention:  David Oldani
                                Telecopy:  (214) 979-1104
                                Telephone: (214) 979-2777





                                     -5-
<PAGE>   172



                                   EXHIBIT H


June 12, 1998




To Each of the Banks Party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Administrative
Agent for the Banks

Ladies and Gentlemen:

I have acted as counsel to Arkansas Best Corporation, a Delaware corporation
(the "Borrower"), and the Guarantors in connection with the Credit Agreement
dated as of June 12, 1998 (the "Credit Agreement"), among the Borrower, the
Banks, Bank of America National Trust and Savings Association and Wells Fargo
Bank (Texas), N.A., as Co-Documentation Agents, and Societe Generale, Southwest
Agency, as Administrative Agent.  I have been requested to render this opinion
pursuant to Section 3.01(a)(iv) of the Credit Agreement.  Capitalized terms not
otherwise defined in this opinion that are defined in the Credit Agreement
shall have the meanings assigned to them in the Credit Agreement.

In connection with this opinion, I have examined and relied upon the originals,
or copies certified or otherwise identified to my satisfaction, of such
corporate documents and records of the Borrower and the Guarantors and have
received such information from officers and representatives of the Borrower and
the Guarantors as I have deemed necessary or appropriate to enable me to
express the opinions expressed below.  I have also relied on certificates of
officers of the Borrower and the Guarantors and certificates of public
officials as to certain factual matters.  For purposes of this opinion, I have
also examined each of the Credit Documents.

In rendering my opinion, I have assumed (a) the genuineness of all signatures,
(b) the authenticity of all documents submitted to me as originals, (c) the
conformity to authentic original documents of all documents submitted to me as
certified, conformed, or photostatic copies, and (d) the due authorization,
execution, and delivery of all documents referred to herein by the parties
thereto other than the Borrower and the Guarantors.
<PAGE>   173

To Each of the Banks Party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Administrative
Agent for the Banks
June 12, 1998
Page 2

Based on the foregoing and subject to the further assumptions, qualifications,
and limitations set forth below, and as may be disclosed in the Credit
Documents, I am of the opinion that:

1.       The Borrower and the Guarantors are corporations duly incorporated,
         validly existing, and in good standing under the laws of the
         jurisdictions of their incorporation.

2.       The Borrower and the Guarantors have the requisite corporate power to
         own or hold under lease their assets and to carry on their businesses
         as now being conducted and as proposed to be conducted.

3.       The Borrower and the Guarantors are duly qualified as foreign
         corporations and are authorized to do business in each jurisdiction
         where the character of the properties owned or held under lease by
         them or the nature of the business transacted by them makes such
         qualification necessary and where failure to so qualify would have a
         material adverse effect on the business, operations, or financial
         condition of the Borrower or any of the Guarantors.

4.       To my knowledge after due inquiry, there are no legal or arbitral

         proceedings or any proceedings by or before any governmental or
         regulatory authority or agency, now pending or threatened against or
         affecting the Borrower or any of the Guarantors or the rights of the
         Borrower or any of the Guarantors which could reasonably be expected
         to have a material adverse effect on the financial condition,
         operations, or business of the Borrower or any of the Guarantors or
         the ability of the Borrower or any of the Guarantors to perform their
         respective obligations under the Credit Documents.

5.       None of (a) the execution and delivery of the Credit Documents, (b)
         the consummation of the transactions therein contemplated, or (c)
         compliance with the terms and provisions thereof will (i) conflict
         with or result in a breach of, or require any consent under, the
         certificate or articles, as the case may be, of incorporation or
         bylaws of the Borrower or any of the Guarantors, or any law or
         regulation applicable to the Borrower or any of the Guarantors, or any
         of their respective properties, or any order, writ, injunction or
         decree of any court or Governmental Authority or agency known to us
         after due inquiry, (ii) conflict with any material agreement or
         instrument to which the Borrower or any of the Guarantors is a party
         or by which the Borrower or any of the Guarantors or their respective
         properties are bound, known to us after due inquiry (a "Material
         Contract"), or (iii) constitute a default under any Material Contract
         or (except for the Liens permitted by the Agreement) result in the
         creation or imposition of any
<PAGE>   174

To Each of the Banks Party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Administrative
Agent for the Banks
June 12, 1998
Page 3

         Lien upon any of the revenues or assets of the Borrower or any of the
         Guarantors pursuant to the terms of any such Material Contract.

6.       The Borrower and the Guarantors have all necessary corporate power and
         authority to execute, deliver and perform their respective obligations
         under the Credit Documents to which they are a party and the
         execution, delivery, and performance by the Borrower and the
         Guarantors of the Credit Documents to which they are a party and the
         obligations thereunder have been duly authorized by all necessary
         corporate action.

7.       The Credit Documents to which they are a party have been duly and
         validly executed and delivered by the Borrower and the Guarantors and
         constitute legal, valid, and binding obligations of the Borrower and
         the Guarantors enforceable against them in accordance with their
         respective terms, except that the enforceability thereof may be
         limited (a) by bankruptcy, insolvency, reorganization, fraudulent
         conveyance, or moratorium or other similar laws relating to the
         enforcement of creditors' rights generally and (b) by general
         principles of equity (regardless of whether such enforceability is
         considered in a proceeding in equity or at law).

8.       No authorizations, approvals, or consents of, or filings or
         registrations with, any governmental or regulatory authority or agency
         are necessary for the execution, delivery, or performance by the
         Borrower or any of the Guarantors of the Credit Documents to which
         they are a party, except for authorizations, consents, and approvals
         that have already been obtained and filings which have already been
         made.

9.       Neither the Borrower nor any of its Subsidiaries is engaged
         principally, or as one of its important activities, in the business of
         extending credit for the purpose of purchasing or carrying margin
         stock (within the meaning of Regulation_U or X of the Board of
         Governors of the Federal Reserve System).

10.      Neither the  Borrower nor any of its Subsidiaries is an "investment
         company" or a company "controlled" by an "investment company" within
         the meaning of the Investment Company Act of 1940, as amended.

11.      The Borrower Security Agreement and the Guarantors Security Agreement
         each create valid security interests in favor of the Agent for the
         benefit of the Banks, enforceable against the Borrower and each
         Guarantor, respectively, in all rights, titles and interests of the
         Borrower in the Collateral (as defined in such Security Agreement), as
         security for the Secured Obligations (as defined in such Security
         Agreements).  Upon (i) the filing of the UCC1 Financing Statements
         executed by
<PAGE>   175

To Each of the Banks Party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Administrative
Agent for the Banks
June 12, 1998
Page 4

         the Borrower and the respective Guarantors in the forms attached as
         Annex 2to each such Security Agreement at the locations listed on
         Annex 3 to each such Security Agreement and Annex 7 to the Guarantors
         Security Agreement for the respective Grantor (as defined in such
         Security Agreements), (ii) the delivery of the Pledged Shares (as such
         terms are defined in each such Security Agreement), together with
         stock powers executed in blank to the Agent, and (iii) the filing of
         applications for certificates of title noting the Agent's lien thereon
         with the appropriate Registry of Motor Vehicles or similar authority,
         then such security interests granted by the Borrower and the
         Guarantors (other than the Canadian Subsidiaries) under the Uniform
         Commercial Code or other applicable law will be perfected security
         interests in the Collateral described therein or evidenced thereby.

The foregoing opinion is, with your concurrence, predicated upon and qualified
in its entirety by the following:

         I am a member of the Bar of the State of Arkansas, and I express no
         opinion as to the laws of any jurisdiction, other than the Federal
         Laws of the United States of America, the Laws of the State of
         Arkansas, and the Delaware General Corporation Law.  Insofar as the
         foregoing opinion involves agreements that purport to be governed by
         Texas or other states' laws, I have assumed that such law is the same
         as the Law of the State of Arkansas.

This opinion is solely for your benefit and may not be relied upon by any
person other than you and your counsel and any of your assignees and
participants.

Very truly yours,



Richard F. Cooper
<PAGE>   176
                                   EXHIBIT I


                                  June 12, 1998



To each of the Banks party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Administrative Agent
for the Banks.


Ladies and Gentlemen:

We have acted as special counsel to Societe Generale, Southwest Agency, acting
for itself and as Administrative Agent, and Bank of America National Trust and
Savings Association and Wells Fargo Bank (Texas), N.A., as Co-Documentation
Agents (the "Agents"), in connection with the preparation, execution and
delivery of the Credit Agreement dated as of June 12, 1998 (the "Credit
Agreement") among Arkansas Best Corporation, a Delaware corporation (the
"Borrower"), the Banks, Bank of America National Trust and Savings Association
and Wells Fargo Bank (Texas), N.A., as Co-Documentation Agents, and Societe
Generale, Southwest Agency, as Administrative Agent. Capitalized terms not
otherwise defined in this opinion that are defined in the Credit Agreement shall
have the meaning assigned to them in the Credit Agreement.

In connection with our representation of the Agents, we have examined executed
counterparts of the Credit Agreement, the Notes, the Guaranty, the Security
Agreements, the opinions of legal counsel to the Borrower and the Guarantors,
delivered on the date hereof, and such other documents furnished by the Borrower
and the Guarantors pursuant to Section 3.1 of the Credit Agreement (the "Closing
Documents").

For purposes of this opinion, we have assumed (a) the authenticity of all such
documents submitted to us as originals, (b) the genuineness of all signatures,
and (c) the conformity to the originals of all such documents submitted to us as
copies. We have relied (a) as to factual matters, on the representations and
warranties and other statements of fact contained in the Closing Documents, and
(b) as to matters of law covered by the opinions of counsel to the Borrower and
Guarantors, on such opinions. We also have assumed that each of the Borrower,
the Guarantors, the Banks, the Co-Documentation Agents and the Administrative
Agent has duly executed and delivered the Closing Documents with all necessary
power and authority.



<PAGE>   177



To each of the Banks party to the
Credit Agreement and Societe Generale,
Southwest Agency, as Agent for the Banks
June 12, 1998
Page 2



Based upon the foregoing examination of documents and assumptions and upon such
other investigation as we have deemed necessary, we are of the opinion that the
opinion of Borrower's and Guarantors' counsel and the other Closing Documents
are substantially responsive to the requirements of the Credit Agreement.

This opinion is solely for the benefit of the Banks and the Agents, their
respective successors, assigns, participants and other transferees and may be
relied upon only by such persons in connection with the transactions
contemplated by the Credit Agreement.

                                            Very truly yours,



                                            Bracewell & Patterson, L.L.P.


<PAGE>   178
                                    EXHIBIT J


                             COMPLIANCE CERTIFICATE


         This certificate dated as of __________, 199__ is prepared pursuant to
Section 5.6 [(a)] [(b)] of the Credit Agreement dated as of June 12, (as it may
be amended in accordance with its terms, the "Credit Agreement") among Arkansas
Best Corporation (the "Borrower"), the Banks, Bank of America National Trust and
Savings Association and Wells Fargo Bank (Texas), N.A., as Co-Documentation
Agents, and Societe Generale, Southwest Agency, as Administrative Agent. Unless
otherwise defined in this certificate, capitalized terms that are defined in the
Credit Agreement.

         The Borrower hereby certifies (a) that no Default has occurred or is
continuing, (b) that all of the representations and warranties made by the
Borrower and its Subsidiaries in the Credit Agreement and Section 7 of the
Guaranty and each Security Agreement are true and correct in all material
respects as if made on this date, and (c) that as of the last day of the
previous quarter the amounts and calculations attached as Exhibit A hereto were
true and correct.

         Executed this _____ day of __________, 199__.


                                            ARKANSAS BEST CORPORATION



                                            By:
                                               --------------------------------
                                               David E. Loeffler
                                               Vice President, Chief Financial
                                               Officer, and Treasurer

<PAGE>   179
                                    EXHIBIT K

                           BORROWING BASE CERTIFICATE


         Arkansas Best Corporation, a Delaware corporation (the "Borrower"),
pursuant to Section 5.6(i) of the Credit Agreement dated as of June 12, 1998
(terms defined therein used herein as so defined), among the Borrower, the
Banks, Bank of America National Trust and Savings Association and Wells Fargo
Bank (Texas), N.A., as Co-Documentation Agents, and Societe Generale, Southwest
Agency, as Administrative Agent, does hereby certify the following as of
__________, 19__ [last day of immediately preceding calendar month]:


<TABLE>

<S>                                                                                      <C>
1.       Net Depreciated Value of Eligible Revenue Equipment                              $
                                                                                          --------------------------

2.       Borrowing Base Value of Eligible Revenue Equipment (80%)                         $
                                                                                          --------------------------

3.       Aggregate Outstanding Eligible Receivables                                       $
                                                                                          --------------------------

4.       Borrowing Base Value of Eligible Receivables (85%)                               $
                                                                                          --------------------------

5.       Real Estate Value of Eligible Real Property                                      $
                                                                                          --------------------------

6.       Borrowing Base Value of Eligible Real Property (70%)                             $
                                                                                          --------------------------

7.       Current Market Value of Treadco Shares ($_____ per share)                        $
                                                                                          --------------------------

8.       Borrowing Base Value of Treadco Shares (50%)                                     $
                                                                                          --------------------------

9.       Net Depreciated Value of Eligible Other Equipment                                $
                                                                                          --------------------------

10.      Borrowing Base Value of Eligible Other Equipment (50%)                           $
                                                                                          --------------------------

11.      TOTAL BORROWING BASE VALUE
         (Sum of Lines 2, 4, 6, 8, and 10)                                                $
                                                                                          --------------------------

12.      Total Revolving Commitments                                                      $
                                                                                          --------------------------

13.      BORROWING BASE LIMIT UNDER REVOLVING COMMITMENTS
         (Lesser of Line 11 or Line 12)                                                   $
                                                                                          --------------------------

14.      Outstanding Revolving Advances                                                   $
                                                                                          --------------------------
</TABLE>

<PAGE>   180

<TABLE>

<S>                                                                                       <C>
15.      Letter of Credit Exposure                                                        $
                                                                                          --------------------------

16.      Availability under Revolving Commitments
         (Line 13 minus the sum of Lines 14 and 15)                                       $
                                                                                          --------------------------
</TABLE>

         The Borrower has caused this Borrowing Base Certificate to be executed
this ____ day of ____, 199__.


                                                  ARKANSAS BEST CORPORATION


                                                  By:
                                                     --------------------------
                                                  Name:
                                                       ------------------------
                                                  Title:
                                                        -----------------------
<PAGE>   181
                                    EXHIBIT L


                             FORM OF SWINGLINE NOTE


$15,000,000                                                      June 12, 1998


         For value received, the undersigned Arkansas Best Corporation, a
Delaware corporation ("Borrower"), hereby promises to pay to the order of
Societe Generale, Southwest Agency (the "Bank") the principal amount of Fifteen
Million and No/100 Dollars ($15,000,000) or, if less, the aggregate outstanding
principal amount of each Swingline Advance (as defined in the Credit Agreement
referred to below) made by the Bank to the Borrower, together with interest on
the unpaid principal amount of each such Swingline Advance from the date of such
Swingline Advance until such principal amount is paid in full, at such interest
rates, and at such times, as are specified in the Credit Agreement.

         This Note is the Swingline Note referred to in, and is entitled to the
benefits of, and is subject to the terms of, the Credit Agreement dated as of
June 12, 1998 (as the same may be further amended or modified from time to time,
the "Credit Agreement"), among the Borrower, the Banks, Bank of America National
Trust and Savings Association and Wells Fargo Bank (Texas), N.A., as
Co-Documentation Agents, and Societe Generale, Southwest Agency, as
Administrative Agent. Capitalized terms used in this Note that are defined in
the Credit Agreement and not otherwise defined in this Note have the meanings
assigned to such terms in the Credit Agreement. The Credit Agreement, among
other things, (a) provides for the making of Swingline Advances by the Bank to
the Borrower from time to time at the discretion of the Bank in an aggregate
amount not to exceed at any time outstanding the Dollar amount first above
mentioned, the indebtedness of the Borrower resulting from each such Swingline
Advance being evidenced by this Note and (b) contains provisions for
acceleration of the maturity of this Note upon the happening of certain events
stated in the Credit Agreement and for prepayments of principal prior to the
maturity of this Note upon the terms and conditions specified in the Credit
Agreement.

         Both principal and interest are payable in lawful money of the United
States of America to the Agent at 4800 Trammell Crow Center, 2001 Ross Avenue,
Dallas, Texas 75201 (or at such other location or address as may be specified by
the Agent to the Borrower) in same day funds. The Bank shall record all
Swingline Advances and payments of principal made under this Note, but no
failure of the Bank to make such recordings shall affect the Borrower's
repayment obligations under this Note.

         Except as specifically provided in the Credit Agreement, the Borrower
hereby waives presentment, demand, protest, notice of intent to accelerate,
notice of acceleration, and any other notice of any kind. No failure to
exercise, and no delay in exercising, any rights hereunder on the part of the
holder of this Note shall operate as a waiver of such rights.




<PAGE>   182

         This Note shall be governed by, and construed and enforced in
accordance with, the laws of the state of Texas (except that Tex. Rev. Civ.
Stat. Ann. Art. 5069, Ch. 15, which regulates certain revolving credit loan
accounts shall not apply to this Note).

                                       ARKANSAS BEST CORPORATION



                                       By:
                                          -------------------------------------
                                          David E. Loeffler
                                          Vice President, Chief Financial
                                          Officer, and Treasurer


<PAGE>   1
                                                                  EXHIBIT (b)(2)


                              ARKANSAS BEST CORP.

================================================================================

                               BOARD PRESENTATION



                                December 10, 1998


                           MORGAN STANLEY DEAN WITTER


                                                                  MORGAN STANLEY

<PAGE>   2


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                              PRESENTATION OUTLINE

1)  HISTORICAL OVERVIEW

    o   TREADCO PRICE / VOLUME GRAPH SINCE IPO

    o   RECENT EQUITY ANALYST COMMENTARY

    o   CURRENT VALUATION BASED UPON 1999 PLAN

2)  STRATEGIC ALTERNATIVES

3)  CONSIDERATIONS

4)  PROCESS ALTERNATIVES

5)  ECONOMIC ANALYSIS

                                                                  MORGAN STANLEY

<PAGE>   3


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                           CURRENT TREADCO SITUATION


           o  DEPRESSED FINANCIAL RESULTS

           o  BUSINESS IN TRANSITION

           o  ILLIQUID STOCK DUE TO FLOAT AND SMALL CAPITALIZATION

           o  LIMITED INVESTOR AND ANALYST FOLLOWING

           o  ATTRACTIVE STRATEGIC VALUE



                                                                  MORGAN STANLEY
<PAGE>   4



                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                    TREADCO PRICE PERFORMANCE SINCE ITS IPO


                                    [CHART]

                                    8/10/93
                                 TRED announces
                           acquisition of Trans-World
                                Tire Corporation


                                    7/20/95
                                  2Q operating
                              margine suffers over
                              3% drop compared to
                                  previous 2Q


                                    8/23/95
                                 TRED announces
                                change in Bandag
                                  relationship


                                    10/2/95
                                 TRED announces
                               supplier agreement
                                  with Oliver

                                    10/20/95
                                3 TRED officers
                                leave Company to
                                work for Bandag

                                    10/30/95
                                TRED wins court
                                 order against
                                     Bandag

                                     2/8/96
                             TRED confirms complete
                              conversion to Oliver

                                    10/29/98
                                 TRED suspends
                                regular dividend





                                                                  MORGAN STANLEY
<PAGE>   5



                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                       ANALYSIS OF TREADCO SHAREHOLDINGS

<TABLE>
<CAPTION>
                                                                   TOTAL ASSETS
                                                                       UNDER                       CURRENT               CUMULATIVE
   INSTITUTION                         EQUITY ORIENTATION            MANAGEMENT     CHANGE        HOLDINGS       % TSO      % TSO  
<S>                                    <C>                         <C>           <C>            <C>             <C>      <C>
Arkansas Best Corporation              n/a                               n/a              0       2,497,200      49.2%      49.2%  
Shapiro Capital Management Co., Inc    Growth                            0.1         (9,100)      1,153,225      22.7%      72.0%  
Dimensional Fund Advisors, Inc         Index, Value                     13.2              0         309,192       6.1%      78.1%  
Franklin Resources, Inc                Growth, Incom                    86.9         10,000         303,000       6.0%      84.0%  
Royce & Associates, Inc                Value                             2.0              0          67,100       1.3%      85.4%  
Barclays Global Investors, N.A.        Growth, Value, Index, Quant       n/a         (2,000)         59,666       1.2%      86.5%  
Kennedy Capital Management, Inc        Growth, Value                     1.7        (57,285)         57,115       1.1%      87.7%  
Investment Counselors of Maryland      Value                             4.3              0          40,000       0.8%      88.5%  
Clover Capital Management, Inc.        Value                             1.8         25,000          25,000       0.5%      88.9%  
Mellon Bank, N.A. Index,               Value                            25.4              0          16,100       0.3%      89.3%  
Williams Jones & Associates, Inc       n/a                               n/a              0          10,000       0.2%      89.5%  
Northern Trust Quantitative Advisors   Growth, Value                    23.5          3,400           8,300       0.2%      89.6%  
Dresdner RCM Global Investors (UK)     n/a                               2.7              0           4,500       0.1%      89.7%  
Boston Advisors, Inc.                  Growth                            0.4              0           1,200       0.0%      89.7%  
Donaldson Lufkin & Jeanette, Inc.      n/a                               n/a              0             400       0.0%      89.7%  
First United Trust Company, N.A.       Income                            n/a              0             200       0.0%      89.8%  
The Frost National Bank                n/a                               n/a              0             100       0.0%      89.8%  
Societe Generale Asset Mgmt (US)       Value                             n/a       (195,000)              0       0.0%      89.8%  

Top 18 Holders                                                                     (224,985)     4,552,298       89.8%
Remaining 0 Holdings                                                                      0              0        0.0%
                                                                                -----------    -----------    -------
Total Holder Holdings                                                              (224,985)     4,552,298       89.8%
                                                                                -----------
Other Holdings                                                                                     519,702       10.2%
                                                                                               -----------    -------
Total Shares Outstanding                                                                         5,072,000      100.0%
                                                                                               -----------    -------
<CAPTION>
                                                                   
                                                                         REPORT
   INSTITUTION                         EQUITY ORIENTATION                DATE
<S>                                    <C>                              <C>
Arkansas Best Corporation              n/a                              9/11/98
Shapiro Capital Management Co., Inc    Growth                           9/30/98
Dimensional Fund Advisors, Inc         Index, Value                     6/30/98
Franklin Resources, Inc                Growth, Incom                    9/30/98
Royce & Associates, Inc                Value                            9/30/98
Barclays Global Investors, N.A.        Growth, Value, Index, Quant      9/30/98
Kennedy Capital Management, Inc        Growth, Value                    9/30/98
Investment Counselors of Maryland      Value                            9/30/98
Clover Capital Management, Inc.        Value                            9/30/98
Mellon Bank, N.A. Index,               Value                            9/30/98
Williams Jones & Associates, Inc       n/a                              9/30/98
Northern Trust Quantitative Advisors   Growth, Value                   12/31/97
Dresdner RCM Global Investors (UK)     n/a                              9/30/98
Boston Advisors, Inc.                  Growth                           6/30/98
Donaldson Lufkin & Jeanette, Inc.      n/a                              9/30/98
First United Trust Company, N.A.       Income                           9/30/98
The Frost National Bank                n/a                              6/30/98
Societe Generale Asset Mgmt (US)       Value                            9/30/98
</TABLE>


================================================================================
Summary of Latest 13F Reports

3 Holders increased holdings, of which 1 were new investors or first time filers

4 Holders decreased holdings, of which 1 eliminated their positions 

11 Holders held their positions

Index funds representing 8.5% of Total Holder Shares Outstanding
================================================================================


                                                                  MORGAN STANLEY
<PAGE>   6


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                  RECENT EQUITY ANALYST PERCEPTION OF TREADCO

"Although company results are showing signs of improvement, expenses remain high
and near term results should continue to be weak. Considering the difficult
environment and the current valuation levels, we reiterate our neutral rating."

                                     -- Stephen Girsky, MSDW

"Falling rubber prices continue to favor new tire purchases over recapped tires,
which has a direct negative impact on Treadco. Furthermore, Treadco switched to
another rubber supplier in 1996, which adversely impacted the subsidiary's
margines."

                                     -- James Valentine, MSDW

"Arkansas Best Corp's intentions regarding its 46% ownership stake in Treadco,
are unknown. We believe that the values of both Companies would increase were
the Companies to separate. Moreover, TRED does not have the appropriate capital
structure to grow, nor is ABFS in a position to support rapid growth at
Treadco."

"We believe Treadco has far greater earnings power than the Company is currently
generating. Similarly Treadco is a large player in an industry where
consolidation makes economic sense. However, if Arkansas Best retains its
ownership stake in Treadco, Treadco's ability to fund rapid growth will be
constrained. Additionally, the limited float and uncertainty surrounding the
future of the large block of shares will likely result in the stock continuing
to trade at a discount."

                                     -- Scott Alaniz, Stephens Inc.


                                                                  MORGAN STANLEY
<PAGE>   7


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                           TREADCO CURRENT VALUATION

<TABLE>
<CAPTION>
                                                                            AGGREGATE VALUE/
                                                                 -----------------------------------
                                                    P/E                EBIT              EBITDA
  STOCK      EQUITY     AGGREGATE    PRICE/    --------------    ---------------    ----------------
  PRICE      VALUE(1)    VALUE(2)    BOOK(3)   1998      1999    1998       1999    1998       1999
<C>          <C>        <C>          <C>      <C>        <C>     <C>        <C>     <C>        <C> 
====================================================================================================
BUSINESS PLAN ESTIMATES(4)                    $ 0.9     $3.9    $ 2.2     $ 6.5   $ 5.6     $ 10.5
====================================================================================================

$ 5.00        $25.4       $43.8        0.4x    29.4x     6.4x    19.7x      6.8x    7.9x       4.2x
  7.00         35.5        54.0        0.4x    29.4x     6.4x    19.7x      6.8x    7.9x       4.2x
  9.00         45.7        64.1        0.4x    29.4x     6.4x    19.7x      6.8x    7.9x       4.2x
  11.00        55.8        74.3        0.4x    29.4x     6.4x    19.7x      6.8x    7.9x       4.2x
  13.00        65.9        84.4        0.4x    29.4x     6.4x    19.7x      6.8x    7.9x       4.2x
</TABLE>


Notes (1) Assumes 5,072,255 shares outstanding.
      (2) Aggregate Value equals equity value plus short-term debt plus
          long-term debt. 
      (3) Total Stockholders' Equity was $59.73MM as of
          9/30/98. 
      (4) Source Treadco business plan


                                                                  MORGAN STANLEY
<PAGE>   8


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                             STRATEGIC ALTERNATIVES

1)  Status Quo

2) ABC initiated immediate sale of 100% of Treadco 

3) ABC repurchase of remaining Treadco interest with potential strategic sale 
   in the future



                                                                  MORGAN STANLEY
<PAGE>   9

                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                            VALUATION CONSIDERATIONS

o  Structural mechanisms to maximize ABC's pre-tax and after-tax value

o  ABC specific tax considerations

o  Impact of Bandag settlement 

o  Revenue and earnings momentum of business 

o  Potential strategic buyers 

o  Current and future estimated strategic value 

o  Cost savings associated with 100% owned Treadco 

o  Ability to recapitalize Treadco's balance sheet 

o  Long-term strategic fit with ABC


                                                                  MORGAN STANLEY
<PAGE>   10


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                                POTENTIAL BUYERS

                                o   Goodyear

                                o   Bandag

                                o   Michelin

                                o   Oliver

                                o   BF Goodrich


                                                                  MORGAN STANLEY
<PAGE>   11


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                              PROCESS ALTERNATIVES

SCENARIO 1:  REPURCHASE OF PUBLIC SHARES

o        Potentially approach other significant shareholders to ascertain price
         objectives and willingness to sell

o        Negotiations with Treadco's outside directors (independent committee)
         and external financial and legal advisors

o        Announcement of an agreement with Treadco's independent committee

o        Commencement of tender offer and merger process

o        Estimated timeline:  12-16 weeks



                                                                  MORGAN STANLEY
<PAGE>   12

                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                              PROCESS ALTERNATIVES
                                  (continued)

SCENARIO 2:  100% IMMEDIATE SALE OF TREADCO

o        Prioritize potential buyers

o        Information discussions with one or more potential buyers

o        Potential preparation of offering memorandum and distribution to
         potential bidders

o        Negotiations and receipt of definitive offer

o        Approval by Treadco's outside committee and ABC's Board

o        Tender offer and merger process

o        Estimated timeline:  12-16 weeks


                                                                  MORGAN STANLEY
<PAGE>   13


                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                            IMMEDIATE SALE OF TREADCO
<TABLE>
<S>                                               <C>   
          Value of ABC's holding @ $9(1)          $22.47
          ABC Current Tax Basis                      0.0
          Expense in sale, etc.                     (1.0)
          Income Taxes(2)                           (7.3)
                                                  ------
                 Current After-Tax Proceeds       $14.17
</TABLE>

          Notes:     (1)  $2,497,000 shares currently owned by ABC
                     (2)  34% tax rate



                                                                  MORGAN STANLEY
<PAGE>   14



                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                               REPURCHASE TREADCO

<TABLE>
<CAPTION>
                                                                                                         ABC
           TOTAL     ABC INCREMENTAL                         AFTER-TAX                               INCREMENTAL
EVENTUAL   TREADCO     INVESTMENT        AFTER-TAX         COST OF CARRY       ABC          ABC       AFTER-TAX
  SALE     EQUITY      IN REMAINING         COST OF         ON INCREMENTAL      TAX      AFTER-TAX   PROCEEDS OVER
 PRICE    VALUE(1)    TRED SHARES(2)    DISPOSITION(3)      INVESTMENT       BENEFIT     PROCEEDS   IMMEDIATE SALE
- --------  --------  ----------------    --------------     ---------------   -------     --------   --------------
<C>        <C>        <C>               <C>                  <C>             <C>        <C>           <C>   
$ 5.00     $25.4      $  (23.2)         $   (1.22)           $   (0.92)      $ 13.48    $ 13.52       $(.07)
  6.00      30.4         (23.2)             (1.22)               (0.92)        11.75      16.87         2.7
  7.00      35.5         (23.2)             (1.22)               (0.92)        10.03      20.22         6.0
  8.00      40.6         (23.2)             (1.22)               (0.92)         8.30      23.57         9.4
  9.00      45.6         (23.2)             (1.22)               (0.92)         6.58      26.91        12.7
 10.00      50.7         (23.2)             (1.22)               (0.92)         4.86      30.26        16.3
 11.00      55.8         (23.2)             (1.22)               (0.92)         3.13      33.61        19.4
</TABLE>

Notes    (1)  Assumes 5,072,255 shares outstanding.

         (2)  Purchase of 2,575,000 shares at $9.00 per share.

         (3)  Assumes $2.0MM of expenses and 39% tax rate.

         (4)  Assumes 6.5% interest rate and 39% tax rate.

         (5)  Assumes $65MM tax basis and 34% tax rate.


                                                                  MORGAN STANLEY
<PAGE>   15



                               ARKANSAS BEST CORP.
- --------------------------------------------------------------------------------
                       OTHER POTENTIAL ECONOMIC BENEFITS


          o  Bandag settlement

          o  Potential dividend to ABC through recapitalization 

          o  Ongoing Treadco free cash flow subsequent to repurchase 

          o  Elimination of costs associated with being independently owned



                                                                  MORGAN STANLEY

<PAGE>   1
                                                                  EXHIBIT (b)(3)


                  DISCLAIMER REGARDING FINANCIAL PRESENTATION
                          CONTAINED IN EXHIBIT (b)(3)

     THE FINANCIAL PRESENTATION OF STEPHENS INC. AS PROVIDED IN THIS EXHIBIT
(b)(3) IS PROVIDED PURSUANT TO THE RULES AND REGULATIONS OF THE SECURITIES AND
EXCHANGE COMMISSION. THE PRESENTATION CONTAINS DETAILED INFORMATION REGARDING
THE HISTORICAL FINANCIAL PERFORMANCE OF TREADCO, INC AND CERTAIN COMPARABLE
COMPANIES AND TRANSACTIONS. STEPHENS OBTAINED THE HISTORICAL INFORMATION
REGARDING TREADCO FROM TREADCO MANAGEMENT AND THE HISTORICAL INFORMATION
REGARDING COMPARABLE COMPANIES AND TRANSACTIONS FROM INDUSTRY PUBLICATIONS AND
OTHER SOURCES. STEPHENS HAS NOT INDEPENDENTLY VERIFIED ANY OF SUCH HISTORICAL
INFORMATION.

     THE PRESENTATION ALSO CONTAINS DETAILED PROJECTIONS AND OTHER INFORMATION
REGARDING THE FUTURE FINANCIAL PERFORMANCE OF TREADCO. SUCH PROJECTIONS WERE
BASED ON ESTIMATES AND ASSUMPTIONS THAT ARE INHERENTLY SUBJECT TO SIGNIFICANT
ECONOMIC AND COMPETITIVE UNCERTAINTIES, ALL OF WHICH ARE DIFFICULT TO PREDICT
AND MANY OF WHICH ARE BEYOND THE CONTROL OF TREADCO. ACCORDINGLY, THERE CAN BE
NO ASSURANCE THAT THE PROJECTED RESULTS CAN BE REALIZED OR THAT ACTUAL RESULTS
WILL NOT BE MATERIALLY HIGHER OR LOWER THAN THOSE PROJECTED. THE PROJECTIONS
WERE NOT PREPARED WITH A VIEW TO PUBLIC DISCLOSURE OR COMPLIANCE WITH THE
PUBLISHED GUIDELINES OF THE COMMISSION OR THE GUIDELINES ESTABLISHED BY THE
AMERICAN INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS REGARDING PROJECTIONS OR
FORECASTS. THE INCLUSION OF THE PROJECTIONS IN THIS EXHIBIT SHOULD NOT BE
REGARDED AS AN INDICATION THAT STEPHENS, TREADCO, ARKANSAS BEST CORPORATION OR
ANY OTHER PERSON WHO RECEIVED SUCH INFORMATION CONSIDERS IT AN ACCURATE
PREDICTION OF FUTURE EVENTS. NEITHER STEPHENS, TREADCO, NOR ARKANSAS BEST
CORPORATION INTENDS TO UPDATE, REVISE OR CORRECT SUCH PROJECTIONS IF THEY BECOME
INACCURATE (EVEN IN THE SHORT TERM).

     A NUMBER OF FACTORS COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM
THE PROJECTIONS, INCLUDING GENERAL ECONOMIC CONDITIONS; COMPETITIVE INITIATIVES
AND PRICING PRESSURES; AVAILABILITY AND COST OF CAPITAL; SHIFTS IN MARKET
DEMAND; THE AVAILABILITY OF ALTERNATIVE PRODUCTS TO TREADCO CUSTOMERS AND
PROSPECTIVE CUSTOMERS; WEATHER CONDITIONS; GOVERNMENT REGULATIONS; THE
PERFORMANCE AND NEEDS OF INDUSTRIES SERVED BY TREADCO; ACTUAL FUTURE COSTS OF
OPERATING EXPENSES SUCH AS THE PRICE OF OIL; SELF-INSURANCE CLAIMS AND EMPLOYEE
WAGES AND BENEFITS; AND THE TIMING AND AMOUNT OF CAPITAL EXPENDITURES.
<PAGE>   2


A PRESENTATION TO
================================================================================

  THE SPECIAL COMMITTEE OF THE BOARD OF DIRECTORS OF

  TREADCO, INC.

  REGARDING

  THE ABC PROPOSAL

                                 MARCH 15, 1999

                                STEPHENS INC.
                              INVESTMENT BANKERS

================================================================================
<PAGE>   3

DISCLAIMER
================================================================================

            The historical financial information contained in this presentation
has been obtained from Treadco but has not been independently verified. The
projections contained in this presentation regarding the future financial
performance of Treadco have been developed by Treadco management. Stephens Inc.
has relied upon the accuracy of such historical financial information and
projected financial results in preparing this presentation. Any inaccuracies in
such historical financial information or projected financial results may change
the conclusions expressed in this presentation. Stephens Inc. assumes no
responsibility for any such inaccuracies in the historical financial information
or projected financial results used in this presentation. This memorandum has
been prepared as of March 15, 1998, and reflects information made available to
us prior to such date. It does not include information regarding all of the
assessments made by Stephens Inc. in arriving at its conclusions. This
memorandum has been prepared solely for the use of the Special Committee of the
Board of Directors. It is confidential and may not be disclosed or provided to
any third parties without the written permission of Stephens Inc.

================================================================================
<PAGE>   4

================================================================================

                               TABLE OF CONTENTS

================================================================================

<PAGE>   5

TABLE OF CONTENTS
================================================================================

I.   Overview of ABC Proposal
II.  Historical Trading Analysis
III. Key Valuation Analysis

Appendix
       A. Financial Projections
       B. Comparable Publicly Traded Companies
       C. Comparable Acquisitions


================================================================================
                                                              STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   6

================================================================================

                            OVERVIEW OF ABC PROPOSAL

================================================================================

<PAGE>   7




NEGOTIATIONS TIMETABLE
================================================================================

January 22nd                        Announcement by ABC to acquire all 
                                    outstanding shares of Treadco not owned by
                                    ABC at $9.00 per share.

January 29th                        Special Committee retains Stephens to 
                                    provide an opinion on the fairness of the 
                                    offer price.

February 1Oth                       Special Committee meets with its advisors, 
                                    Stephens and Kutak Rock, to discuss
                                    preliminary analysis by Stephens of the
                                    offer by ABC and the proposed transaction
                                    structure. At the request of the Special
                                    Committee, Stephens attempts to negotiate a
                                    higher price and, with Kutak Rock, changes
                                    in the transaction structure. 

February 16th                       Special Committee meets telephonically with
                                    its advisors to discuss negotiations. At the
                                    request of the Special Committee, Stephens
                                    again attempts to negotiate with ABC a
                                    higher price and, with Kutak Rock, changes
                                    in the transaction structure. 

February 25th                       Stephens meets telephonically with ABC to
                                    discuss the transaction. Stephens attempts
                                    to negotiate a higher price. 

February 26th                       Stephens and Kutak Rock meet telephonically
                                    with ABC to discuss the negotiations of the
                                    transaction. Stephens attempts to negotiate
                                    a higher price. 

================================================================================
                                                                   STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   8

NEGOTIATIONS TIMETABLE
================================================================================

      March 5th                     Special Committee meets telephonically with
                                    its advisors to discuss the negotiations.
                                    Based on ABC's repeated refusals to increase
                                    the offer price, the Special Committee makes
                                    final comments to the transaction documents.

      March 9th                     Special Committee and its advisors meet
                                    telephonically. Stephens and Kutak Rock
                                    advise the Special Committee that the final
                                    comments were acceptable to ABC.

================================================================================
                                                                   STEPHENS INC.
                                                              INVESTMENT BANKERS


<PAGE>   9
OVERVIEW OF FAIRNESS OPINION
================================================================================

         Stephens Inc., in its role as financial advisor to the Special
         Committee of the Board of Directors of Treadco, concludes that the
         current proposal from ABC of $9.00 per share is fair from a financial
         point of view to the stockholders of Treadco. Several factors were
         taken into account to reach this determination:

           o      Analysis of publicly available financial statements and
                  reports

           o      Analysis of internal financial and operating data including
                  financial projections

           o      Review of historical trading activity of Treadco stock

           o      Review of the financial performance and trading activity of
                  the common stock of comparable publicly traded companies

           o      Review of the financial terms of comparable transactions

           o      Review of the definitive merger agreement and related
                  documents

           o      Discussions with management about the future business
                  prospects and potential strategic alternatives of the Company
           

         Stephens also notes that with the proxy from Shapiro Capital
         Management, ABC has voting control of approximately 71.1% of the
         outstanding shares.

================================================================================
                                       1                           STEPHENS INC.
                                                              INVESTMENT BANKERS

                                       
<PAGE>   10

OVERVIEW OF ABC PROPOSAL
================================================================================

  Initial Proposal

      ABC initially proposed a two step transaction:

          Step 1:                   Treadco would self tender for all
          "The Tender"              outstanding common shares not currently 
                                    owned by ABC. Funding for this step would
                                    have come from Treadco's current credit
                                    facility and a loan of up to $12 million
                                    from ABC.
                                
          Step 2:                   A merger between Treadco and ABC with all
          "The Merger"              non-tendered shares receiving the right to 
                                    $9.00 in cash per share. A Proxy statement 
                                    would have been required in conjunction with
                                    the merger.


      Consummation of the Tender and the Merger could have occurred
      independently or the Tender could have been consummated while ABC,
      under certain circumstances, may not have been obligated to close
      the Merger.


================================================================================
                                       2                           STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   11

OVERVIEW OF ABC PROPOSAL
================================================================================
  Current Proposal

      ABC's current proposal includes the following:

              Step 1:               A tender offer by ABC for any and all
              "The Tender"          outstanding common shares of Treadco not
                                    currently owned by ABC at $9.00 per share.
                                    Funding for this step will come from ABC's
                                    credit facility.
                           
              Step 1                A second step merger in which all remaining
              "The Merger"          shares are effectively cashed out at the
                                    offer price. ABC has a proxy from Shapiro
                                    Capital Management, Treadco's second largest
                                    shareholder at 21.5% of outstanding common,
                                    to vote for this merger.
              
================================================================================
                                       3                           STEPHENS INC.
                                                              INVESTMENT BANKERS


<PAGE>   12


KEY FINANCIAL TERMS OF PROPOSAL
================================================================================

Proposed consideration in the ABC proposal consists of $9.00 per share in cash
for the 2,575,055 shares outstanding not already owned by ABC for an aggregate
value of $23.2 million. This is a premium of 33.3% over the closing price on
December 23, 1998, 30 days prior to announcement. In addition, all debt
outstanding will be assumed. Options and Performance Award Units will be cashed
out in the transaction.

<TABLE>
<S>                                                    <C>       <C>     
        Implied Transaction Value

           5.072 million shares @ $9.00 per share                $   45.7
           Equity Value of Stock Options and PAUs                     0.6
           Pro Forma Debt Assumed                                    11.7
           One-time Expenses                                          0.1
                                                                 --------
                  Total Transaction Value                        $   58.1


        Total Transaction Value/                          1998      1999E
                                                        -------- ---------

           Revenue                                         0.3x       0.3x
           EBITDA                                          5.9        4.8
           EBITA                                          15.9       10.7

        Transaction Value/

           Net Income                                     47.3x      17.1x
           Book Value                                      0.7        0.7
</TABLE>



================================================================================
                                       4                           STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   13

ACQUISITION MATRIX
================================================================================
<TABLE>
<CAPTION>
 Dollars in Thousands                                 30 Days
                                                      Before
                                                    Announcement                Offer Value Per Share
                                                    ------------    --------------------------------------------
<S>                                                 <C>             <C>             <C>             <C>         
       Per Share Price                              $       6.75    $       8.00    $       9.00    $      10.00
                                                    ------------    ------------    ------------    ------------
       Premium to Market                                                    18.5%           33.3%           48.1%

       Value of Common Equity                       $     34,238    $     40,578    $     45,650    $     50,723
       Fully Diluted Equity Transaction Value             34,863          41,203          46,275          51,347
       Aggregate Equity + Net Debt Value (a)              46,703          53,044          58,116          63,188



       Total Transaction Value/
              1998 Revenue                                   0.3x            0.3x            0.3x            0.3x
              Estimated 1999 Revenue                         0.2             0.3             0.3             0.3

              1998 EBITDA                                    4.7x            5.4x            5.9x            6.4x
              Estimated 1999 EBITDA                          3.9             4.4             4.8             5.2

              1998 EBITDA                                   12.7x           14.5x           15.9x           17.2x
              Estimated 1999 EBITDA                          8.6             9.7            10.7            11.6
</TABLE>

- ------------------------

(a)      Total transaction includes net value of options and severance expenses.

================================================================================
                                       5                           STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   14




TREADCO HISTORICAL AND MANAGEMENT'S PROJECTED FINANCIAL RESULTS
================================================================================

<TABLE>
<CAPTION>
Dollars in Thousands 

                           For the Years Ended Dec. 31,                  For the Projected Years Ended December 31,
                           -----------------------------    ---------------------------------------------------------------------
                              1997             1998            1999           2000          2001          2002          2003
                           ------------     -----------    ------------    -----------    ----------    ----------    ----------
<S>                        <C>              <C>                 <C>        <C>            <C>           <C>           <C>       
Revenue                    $    161,276     $   181,293         191,935    $   202,987    $  214,714    $  227,162    $  240,378

Gross Profit                     35,581          44,580          47,814         51,424        54,846        58,396        61,936

EBITDA                            3,485           9,850(a)       12,072         13,602        14,796        16,034        17,141

EBITA                            (2,092)          3,666(a)        5,442          7,129         8,449        10,147        11,593

Net Income                       (2,504)            978           2,704          3,703         4,534         5,599         6,508

EPS                        $      (0.49)    $      0.19    $       0.53    $      0.73    $     0.89    $     1.10    $     1.28

     Revenue Growth(b)                             12.4%            5.9%           5.8%          5.8%          5.8%          5.8%
     EPS Growth                                      NM           176.6%          37.0%         22.4%         23.5%         16.2%
     Gross Margin(b)               22.1%           24.6%           24.9%          25.3%         25.5%         25.7%         25.8%
     EBITDA Margin                  2.2%            5.4%            6.3%           6.7%          6.9%          7.1%          7.1%
     EBITA Margin                  (1.3)%           2.0%            2.8%           3.5%          3.9%          4.5%          4.8%
     Net Income Margin             (1.6)%           0.5%            1.4%           1.8%          2.1%          2.5%          2.7%
- ---------------------------------------------------------------------------------------------------------------------------------
Net Working Capital              29,702          29,254          30,972         32,755        34,647        36,656        38,789
Net PP&E                         31,329          34,313          33,929         35,956        38,609        42,222        46,675
Total Debt                       15,314          11,741          11,741         11,741        11,741        11,741        11,741
Total Debt/Total Capital           20.7%           15.3%           15.1%          14.5%         13.8%         13.0%         12.2%
Capital Expenditures              2,015           7,517           6,246          8,500         9,000         9,500        10,000
</TABLE>

(a)      Restated for add-back of $1,174 of legal expense associated with
         Bandag Settlement.

(b)      Revenue growth and gross margins are based on assumptions provided
         by management. 

================================================================================
                                       6                           STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   15
TREADCO OWNERSHIP PROFILE
================================================================================

<TABLE>
<CAPTION>
                                                                     As a % of
Dollars in Thousands                            Shares             Fully-Diluted
                                                Owned                Shares Out
                                              ---------            -------------
<S>                                           <C>                  <C>
Institutional Holdings(a)
  Shapiro Capital Management Co., Inc.        1,130,880                 21.1%
  Franklin Resources, Inc.                      329,000                  6.1%
  Dimensional Fund Advisors, Inc.               309,092                  5.8%
  Clover Capital Management, Inc.                75,000                  1.4%
  Royce & Associates, Inc.                       67,100                  1.3%
  Barclays Global Investors, N.A.                59,666                  1.1%
  Mellon Private Asset Management                16,100                  0.3%
  Williams Jones & Associates Inc.               10,000                  0.2%
  All Others as a Group                           5,200                  0.1%
                                              ---------                -----
    Total Institutional Ownership             2,002,038                 37.3%

Estimated Individual Float                      741,814                 13.8%
                                              ---------                -----
Public Float                                  2,743,852                 51.2%

Corporate Insiders(b)
  Arkansas Best Corporation                   2,497,200                 46.6%
  Daniel V. Evans                                24,579                  0.5%
  William A. Marquard                            24,000                  0.4%
  Nicholas M. Georgitsis                         18,000                  0.3%
  John R. Meyers                                 16,624                  0.3%
  John H. Morris                                 14,000                  0.3%
  Robert B. Gilbert                              14,000                  0.3%
  Robert A. Young III(c)                         10,000                  0.2%
                                              ---------                -----
    Total Corporate Insiders                  2,618,403                 48.8%

Total Shares Outstanding(d)                   5,072,255                 94.6%
Options Outstanding                             290,000                  5.4%
                                              ---------                -----
Total Fully-Diluted Shares Outstanding        5,362,255                100.0%
                                              =========                =====
</TABLE>

- ------------
(a) Source: Technimetrics, March 11, 1999.
(b) Includes options owned. Source: Company proxy dated May 6, 1998.
(c) Does not include beneficial shares owned by Mr. Young in Arkansas Best 
    Corporation.
(d) Source: Company 10-Q dated September 30, 1998.

================================================================================
                                       7                      STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   16




================================================================================



                          HISTORICAL TRADING ANALYSIS



================================================================================

<PAGE>   17
PRICE AND VOLUME GRAPH
================================================================================
  March 10, 1997 to March 10, 1999

       [Graph depicting Share Price and Trading Volume for Treadco Common
                        Stock during referenced period]

                             VOLUME IN THOUSANDS
                           -----------------------------
                           52 Week High           $10.13
                           52 Week Low            $ 4.75
                           360 Day Avg. (a)       $ 7.59
                           90 Day Avg. (a)        $ 6.34
                           30 Day Avg. (a)        $ 6.63
                           -----------------------------


(a) Prior to announcement of transaction

================================================================================
                                      8                       STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   18
TREADCO TRADING VOLUME ANALYSIS
================================================================================
  March 10, 1997 to March 10, 1999



<TABLE>
<CAPTION>
                     # OF DAYS      AVERAGE       TOTAL
  PRICE RANGE         TRADED        VOLUME       VOLUME
- ----------------     ---------     ---------   -----------
<S>                  <C>            <C>         <C>
$13.01 - $14.00          2           4,850         9,700
               
$12.01 - $13.00         25           6,420       160,500
               
$11.01 - $12.00          6          23,583       141,500
               
$10.01 - $11.00         47           7,681       361,000
               
$ 9.01 - $10.00        128           7,755       992,700
               
$ 8.01 - $ 9.00        157           3,609       566,600
               
$ 7.01 - $ 8.00         49           6,018       294,900
               
$ 6.01 - $ 7.00         79           8,320       657,300
               
$ 5.01 - $ 6.00         13          19,677       255,800
                     -----        --------   -----------
TOTAL                  506           6,798     3,440,000
                     =====        ========   ===========
</TABLE>

                     DISTRIBUTION OF TOTAL VOLUME TRADED



<TABLE>
<S>                     <C>
$13.01 - $14.00           0.3%
               
$12.01 - $13.00           4.7%
               
$11.01 - $12.00           4.1%
               
$10.01 - $11.00          10.5%
               
$ 9.01 - $10.00          28.9%
               
$ 8.01 - $ 9.00          16.5%
               
$ 7.01 - $ 8.00           8.6%
               
$ 6.01 - $ 7.00          19.1%
               
$ 5.01 - $ 6.00           7.4%
</TABLE>


================================================================================
                                      9                       STEPHENS INC.
                                                              INVESTMENT BANKERS



<PAGE>   19
INDEXED PRICE COMPARISON
================================================================================
  March 10, 1997 to March 10, 1999


    [Graph depicting price comparison of S&P 500 Stock Index, Treadco Common
                          Stock and Peer Group Index]


Peer Group Includes: TBCCC, BDG, SPD, CTB, GT
Indexed prices are market cap weighted
================================================================================
                                      10                      STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   20



================================================================================



                             KEY VALUATION ANALYSIS



================================================================================

<PAGE>   21
OVERVIEW OF VALUATION METHODS
================================================================================
     Key valuation methods used to determine the fairness from a financial point
     of view of the consideration to be received in the ABC proposal include:
     ---------------------------------------------------------------------------
     Comparable Company Analysis      Examined the trading multiples of
                                      comparable publicly traded companies.
                                      Focused on multiples of EBITDA, EBITA and
                                      Net Income.
     ---------------------------------------------------------------------------
     Comparable Transaction Analysis  Analyzed change of control transactions of
                                      comparable companies, focusing on EBITDA,
                                      EBITA and Net Income multiples.
     ---------------------------------------------------------------------------
     Discounted Cash Flow Analysis    Utilized management projections to develop
                                      a current valuation by discounting the
                                      cash flows and a terminal valuation.
     ---------------------------------------------------------------------------
     Premium Paid Analysis            Compared the 30 day premium offered in the
                                      ABC proposal to that of several other
                                      transactions where large shareholders
                                      acquired the remaining equity interest in
                                      similar going private transactions.
     ---------------------------------------------------------------------------
     Historical Trading Prices        Compared the offer price to the range of
                                      prices the Company's common stock had
                                      traded at during the past year.
================================================================================
                                       11                          STEPHENS INC.
                                                              INVESTMENT BANKERS


<PAGE>   22
VALUATION SUMMARY
================================================================================


     [Chart depicting implied valuation ranges derived from each valuation
                       method in relation to $9.00 price]



================================================================================
                                      12                      STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   23




FOOTNOTES TO VALUATION SUMMARY
================================================================================

     (a)  Assumes EBITDA multiples of 4.0x to 6.0x based on comparable publicly
            traded company multiples.

     (b)  Assumes EBITA multiples of 6.0x to 9.0x based on comparable publicly
            traded company multiples.

     (c)  Assumes P/E multiples of 10.0x to 16.0x based on comparable publicly
            traded company multiples.

     (d)  Assumes P/E multiples of 8.0x to 14.0x based on comparable publicly
            traded company multiples.

     (e)  Assumes EBITDA multiples of 6.0x to 10.0x based on comparable publicly
            traded company multiples.

     (f)  Assumes EBITA multiples of 10.0x to 20.0x based on comparable
            transaction multiples.

     (g)  Assumes EPS multiples of 20.0x to 40.0x based on comparable
            transaction multiples.

     (h)  Assumes DCF with exit EBITDA multiples of 5.0x to 7.0x and a discount
            rate of 11.0% to 13.0%.

     (i)  Assumes a premium on the market price 30 days and 1 day prior to
            announcement of 10% to 50% based upon comparable going private 
            transactions.

     (j)  Reflects the high and low market prices of Treadco stock over the
            last 52 week period.
================================================================================
                                       13                          STEPHENS INC.
                                                              INVESTMENT BANKERS

                                         

<PAGE>   24
SUMMARY OF COMPARABLE COMPANIES
================================================================================
  Dollars In Millions


<TABLE>
<CAPTION>
                                                                                                             TOTAL 
                                                                        MARKET CAPITALIZATION (a)/  MARKET CAPITALIZATION (b)/
                                                                        --------------------------  --------------------------
                                 3/10/99                       TOTAL        LTM         CFY                                  
                                  MARKET        MARKET         MARKET       NET       I/B/E/S         LTM            LTM       
          COMPANY                 PRICE        CAP. (a)       CAP. (b)     INCOME   ESTIMATE (c)    EBITDA (d)     EBITA (e)   
- ----------------------------     -------     -----------     ---------    --------  ------------    ----------     ---------
<S>                              <C>         <C>             <C>          <C>       <C>             <C>            <C>
TBC, Corp.                        $ 5.69     $   120.4       $  241.9       7.1x       6.3x            5.9x          7.0x
Bandag, Inc.                       31.25         703.5          644.1      12.1       11.4             4.7           5.9
Standard Products Co.              15.63         251.2          454.9       6.8        7.8             4.0           7.0
Cooper Tire & Rubber Co.           20.13       1,562.8        1,734.5      12.3       11.3             5.6           8.1
Goodyear Tire & Rubber Co.         50.69       7,933.2        9,944.0      10.1       11.7             5.8           8.1
</TABLE>


SUMMARY OF MARKET MULTIPLES

<TABLE>
<S>                                                                        <C>        <C>              <C>           <C> 
  Maximum                                                                  12.3x      11.7x            5.9x          8.1x
  Minimum                                                                   6.8        6.3             4.0           5.9 
  Average                                                                   9.7        9.7             5.2           7.2 
  Median                                                                   10.1       11.3             5.6           7.0 
</TABLE>

- -------------------

(a) Market capitalization is equal to common shares outstanding multiplied by
    the current market price.

(b) Market capitalization plus total debt less cash and cash equivalents.

(c) Defined as current market price divided by the current fiscal year I/B/E/S
    estimate.

(d) For comparative purposes, defined as earnings before interest and taxes plus
    depreciation and amortization.

(e) Earnings before interest, taxes, and amortization of selected intangibles.
    Selected intangible assets consist of goodwill, trademarks and non-compete
    agreements.


================================================================================
                                      14                      STEPHENS INC.
                                                              INVESTMENT BANKERS

<PAGE>   25
SUMMARY OF COMPARABLE TRANSACTIONS
================================================================================
  Dollars in Millions


<TABLE>
<CAPTION>
                                                                                           Transaction              Total
                                                                          Total              Value/           Transaction Value/
 Closing                                                 Transaction    Transaction        -----------    --------------------------
   Date            Acquiror               Target            Value          Value           Net Income       EBITDA         EBITA
- ---------   -----------------------   ---------------    -----------    -----------        -----------    -----------   ------------
<S>         <C>                       <C>                <C>            <C>                <C>            <C>           <C>
12/24/98     Goodyear Tire & Rubber   Brad Ragan, Inc.    $ 81.6         $121.3              46.4x           14.1x         20.1x
                                                                                   
03/01/97     Cooper Tire & Rubber     Avon Tyres plc       110.4          135.5              22.5             6.2          10.5
                                                                                   
07/15/96     TBC Corporation          Big O Tires           56.0           69.8              29.6             7.9           9.2

             -----------------------------------------------------------------------------------------------------------------------
             ABC                      Treadco, Inc          45.7           58.1              47.3x            5.9x         15.9
             -----------------------------------------------------------------------------------------------------------------------
</TABLE>


================================================================================
                                      15                      STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   26
SUMMARY OF DISCOUNTED CASH FLOW ANALYSIS
================================================================================
<TABLE>
<CAPTION>
Dollars in Thousands

                                                                         Assumes a Discount Rate of:
                                                       ------------------------------------------------------------
ENTERPRISE VALUE                                          11.0%       11.5%        12.0%        12.5%       13.0%
                                                       --------     --------     --------     --------     --------
<S>                                         <C>        <C>          <C>          <C>          <C>          <C>     
                                            5.0x       $ 53,671     $ 52,519     $ 51,397     $ 50,305     $ 49,241
                                            5.5          58,757       57,492       56,260       55,061       53,893
Terminal Value Multiple                     6.0          63,843       62,465       61,123       59,817       58,544
2003 EBITDA = $ 17,141                      6.5          68,929       67,438       65,986       64,573       63,196
                                            7.0          74,015       72,411       70,849       69,329       67,848

Plus: Cash & Cash Equivalents                          $    --      $     --     $     --     $     --     $     --
Less: Total Debt                                         11,741       11,741       11,741       11,741       11,741
</TABLE>

<TABLE>
<CAPTION>

EQUITY VALUE                                                           Assumes a Discounted Rate of: 
                                                       ------------------------------------------------------------  
                                                          11.0%       11.5%        12.0%        12.5%       13.0%   
                                                       --------     --------     --------     --------     -------- 
<S>                                         <C>        <C>          <C>          <C>          <C>          <C>     
                                            5.0x       $ 41,930     $ 40,778     $ 39,656     $ 38,564     $ 37,500
                                            5.5          47,016       45,751       44,519       42,320       42,152
                                            6.0          52,102       50,724       49,383       48,076       46,804
                                            6.5          57,188       55,697       54,246       52,832       51,455
                                            7.0          62,275       60,670       59,109       57,588       56,107
</TABLE>

<TABLE>
<CAPTION>
                                                                       Assumes a Discounted Rate of:
EQUITY VALUE PER SHARE                                 ------------------------------------------------------------ 
1998 Shares Outstanding (in Thousands)= 5,072            11.0%       11.5%        12.0%        12.5%       13.0%   
                                                       --------     --------     --------     --------     -------- 
<S>                                         <C>        <C>          <C>          <C>          <C>          <C>     
                                            5.0x       $   8.27     $   8.04     $   7.82     $   7.60     $   7.39
                                            5.5            9.27         9.02         8.78         8.54         8.31
                                            6.0           10.27        10.00         9.74         9.48         9.23
                                            6.5           11.27        10.98        10.69        10.42        10.14 
                                            7.0           12.28        11.96        11.65        11.35        11.06
</TABLE>

================================================================================
                                       16                    STEPHENS INC.
                                                             INVESTMENT BANKERS
<PAGE>   27
SUMMARY OF PREMIUM ANALYSIS
===============================================================================
     Dollars in Millions


<TABLE>
<CAPTION>
                                                                                                        Value of      Initial % 
  Date          Date                                                                                   Transaction    of Shares 
Announced     Effective        Target Name                               Acquiror Name                   ($mil)         Owned   
- ---------     ---------       ---------------------------------       ------------------------------   -----------    ---------
<S>            <C>            <C>                                     <C>                              <C>            <C>
01/28/97       05/21/97       Calgene Inc (Monsanto Co)               Monsanto Co                      $   242.6         56.3%  
02/13/97       05/20/97       Reflectone Inc                          British Aerospace Holdings            41.1         43.4   
06/03/97       01/15/98       Faulding Inc (FH Faulding & Co)         FH Faulding & Co Ltd                  77.3         62.0   
06/20/97       03/30/98       Wheelabrator Technologies Inc           Waste Management Inc                 869.7         67.0   
06/26/97       11/26/97       Rhone-Poulene Roner Inc                 Rhone-Poulene SA                   4,831.6         65.0   
07/30/97       09/18/97       Amdahl Corp                             Fujitsu Ltd                          924.8         42.0   
07/30/97       02/02/98       Plasti-Line Inc                         PL Holdings Corp                      30.7         47.0   
08/04/97       12/23/97       Perkins Family Restaurant LP            Restaurant Co                         76.3         48.0   
09/04/97       12/30/97       Cinergi Pictures Entertainment          Investor Group                        16.3         51.8   
10/23/97       01/08/99       Brad Ragan Inc (Goodyear Tire)          Goodyear Tire & Rubber Co             20.7         75.0   
12/23/97       03/20/98       American Paging Inc                     Telephone and Data Systems Inc         9.1         73.9   
01/08/98       01/30/98       Rayonier Timberlands LP                 Rayonier Inc                          65.8         74.7   
01/22/98       09/29/98       BT Office Products Intl Inc             Buhrmann NV                          138.1         70.0   
03/05/98       05/20/98       XLConnect Solutions Inc                 Xerox Corp                            93.0         80.0   
04/30/98       11/02/98       Mycogen Corp (Dow AgroSciences)         Dow AgroSciences (Dow Chemical)      355.2         69.0   
05/11/98       12/07/98       DeKalb Genetics Corp                    Monsanto Co                        2,262.7         40.0   
09/23/98       12/17/98       J&L Specialty Steel Inc                 Usinor SA                            115.0         53.5   





- --------       --------       ---------------------------------       ------------------------------   ---------      -------   
01/22/99                      Treadco, Inc                            Arkansas Best Corporation        $    55.1         49.0
- --------       --------       ---------------------------------       ------------------------------   ---------      -------   
</TABLE>



<TABLE>
<CAPTION>
                                          Target Stock Price
                         -----------------------------------------------------
   % of       Price         30 Days        1 Day                                     
  Shares       Per          Before         Before       30 Day          1 Day        
    Acq.      Share         Announ.        Announ       Premium        Premium       
  ------    --------     -----------    ----------      -------        -------
<S>         <C>          <C>            <C>             <C>            <C>
   43.7%    $   8.00     $     5.06     $     4.94       58.0%          62.0%         
   56.6        24.00          19.25          20.00       24.7%          20.0%         
   38.0        13.50           9.25          10.75       45.9%          25.6%         
   33.0        16.50          12.38          13.00       33.3%          26.9%         
   35.0        97.00          75.50          79.44       28.5%          22.1%         
   58.0        12.40           8.81          11.81       40.7%           5.0%         
   53.0        14.50          11.13          10.63       30.3%          36.5%         
   52.0        14.00          10.75          10.88       30.2%          28.7%         
   48.2         2.52           1.50           1.81       68.0%          39.0%         
   25.0        37.25          29.00          30.00       28.4%          24.2%         
   26.1         2.50           2.06           2.13       21.2%          17.6%         
   25.3        13.00          12.00          11.69        8.3%          11.2%         
   30.0        13.75           7.75          10.38       77.4%          32.5%         
   20.0        20.00          17.13          22.50       16.8%         -11.1%         
   31.0        28.00          18.19          19.75       54.0%          41.8%         
   60.0       100.00          70.81          77.00       41.2%          29.9%         
   46.5         6.38           5.06           3.19       26.0%         100.2%         

                                   ------------------------------------------
                                   Maximum               77.4%         100.2%
                                   Minimum                8.3%         -11.1%
                                   Mean                  37.2%          30.1%
                                   Median                10.3%          26.9%
                                   ------------------------------------------

  -----     -------      ----------     ----------      -----          ------ 
   50.0%    $  9.00      $     6.75     $     6.50       33.3%          38.5% 
  -----     -------      ----------     ----------      -----          ------ 
</TABLE>

================================================================================
                                       17                     STEPHENS INC.
                                                              INVESTMENT BANKERS
<PAGE>   28






================================================================================
                                   APPENDIX A

                             FINANCIAL PROJECTIONS


================================================================================


<PAGE>   29


PROJECT TREADCO
TREADCO Revised Projections - Consolidated Income Statement
================================================================================
<TABLE>
<CAPTION>
(Dollars in Thousands, Except Per Share)

                                        FYE December 31,                           Projected FY Ended December 31,
                                 --------------------------------------------------------------------------------------------------
                                    1997          1998(a)         1999           2000           2001           2002         2003 
                                 ----------     -----------    ----------     ----------     ----------     ----------   ---------- 
<S>                              <C>            <C>            <C>            <C>            <C>            <C>          <C>        
Total Sales                         161,276        181,293        191,935        202,987        214,714        227,162      240,378
Cost of Sales                       125,695        136,713        144,121        151,563        159,868        168,766      178,442
                                 ----------     -----------    ----------     ----------     ----------     ----------   ---------- 

Gross Profit                         35,581         44,580         47,814         51,424         54,846         58,396       61,936
Total SG&A and Bonus                 32,096         34,730         35,742         37,822         40,050         42,362       44,796

EBITDA                                3,485          9,850         12,072         13,602         14,796         16,034       17,141
Depreciation                          5,576          6,184          6,630          6,473          6,347          5,887        5,547
                                 ----------     -----------    ----------     ----------     ----------     ----------   ---------- 

EBITA                                (2,092)         3,666          5,442          7,129          8,449         10,147       11,593

Total Other Expense (Income)          1,786          1,100          1,080 (a)      1,155          1,135          1,116        1,097

Income (Loss) Before Taxes           (3,878)         1,392          4,361          5,973          7,313          9,031       10,497
Income Tax Expense (Benefit)         (1,374)           414          1,657          2,270          2,779          3,432        3,989
                                 ----------     -----------    ----------     ----------     ----------     ----------   ----------

Net Income (Loss)                $   (2,504)    $      978     $    2,704     $    3,703     $    4,534     $    5,599   $    6,508
                                 ==========     ==========     ==========     ==========     ==========     ==========   ==========

Earnings Per Share               $    (0.49)    $     0.19     $     0.53     $     0.73     $     0.89     $     1.10   $     1.28
                                 ==========     ==========     ==========     ==========     ==========     ==========   ==========

Weighted Average Common Shares 
  (In Thousands)                  5,072.255      5,072.255      5,072.255      5,072.255      5,072.255      5,072.255    5,072.255
 
MARGINS
- ------------------------------------------------------------------------------------------------------------------------------------
  EBITDA                                2.2%           5.4%           6.3%           6.7%           6.9%           7.1%         7.1%
  EBITA                                (1.3)%          2.0%           2.8%           3.5%           3.9%           4.5%         4.8%
  Net Income (Loss)                    (1.6)%          0.5%           1.4%           1.8%           2.1%           2.5%         2.7%
====================================================================================================================================

GROWTH RATES
- ------------------------------------------------------------------------------------------------------------------------------------
  Total Sales                                         12.4%           5.9%           5.8%           5.8%           5.8%         5.8%
  EBITDA                                             182.7%          22.6%          12.7%           8.8%           8.4%         6.9%
  EBITA                                                 NM           48.5%          31.0%          18.5%          20.1%        14.3%
  Net Income (Loss)                                     NM          176.6%          37.0%          22.4%          23.5%        16.2%
  Earnings Per Share                                    NM          176.6%          37.0%          22.4%          23.5%        16.2%
====================================================================================================================================
</TABLE>

(a)  Excludes one time gain from sales of asset.

   
<PAGE>   30
PROJECT TREADCO
TREADCO Revised Projections - Consolidated Balance Sheet
================================================================================
<TABLE>
<CAPTION>
(Dollars in Thousands, Except Per Share)
                                               FYE December 31,                Projected FY Ended December 31, 
                                            --------------------    --------------------------------------------------------
ASSETS:                                        1997       1998        1999        2000        2001        2002        2003
                                            --------    --------    --------    --------    --------    --------    --------
<S>                                         <C>         <C>         <C>         <C>         <C>         <C>         <C>     
Current Assets
    Cash & Equivalents                      $     --    $     --    $  1,830    $  2,183    $  2,631    $  3,067    $  3,449
    Accounts Receivable                       25,537      27,170      28,765      30,422      32,179      34,045      36,025
    Inventories                               27,326      30,670      32,471      34,340      36,324      38,430      40,666
    Other Current Assets                       2,782       1,725       1,826       1,932       2,043       2,162       2,287
                                            --------    --------    --------    --------    --------    --------    --------
Total Current Assets                          55,645      59,566      64,893      68,876      73,178      77,704      82,428

Property & Equipment, Net                     31,329      34,313      33,929      35,956      38,609      42,222      46,675

Goodwill, Less Amortization                   12,694      12,232      11,770      11,308      10,846      10,384       9,922
Noncompete Agreements, Less Amortization         174          --          --          --          --          --          --
Deferred Income Taxes Receivable                  --         146         154         163         172         182         193
Other Assets                                     616       1,113       1,113       1,113       1,113       1,113       1,113
                                            --------    --------    --------    --------    --------    --------    --------
Total Assets                                $100,458    $107,370    $111,860    $117,417    $123,919    $131,606    $140,332
                                            ========    ========    ========    ========    ========    ========    ========

LIABILITIES & SHAREHOLDERS' EQUITY
Current Liabilities
    Short Term Debt                         $    125    $  3,037    $  3,037    $  3,037    $  3,037    $  3,037    $  3,037
    Accounts Payable                          17,144      17,905      18,956      20,048      21,206      22,436      23,741
    Accrued Liabilities                        8,067       8,563       9,065       9,587      10,141      10,729      11,354
    Current Portion of LT Debt                 2,305       2,545       2,545       2,545       2,545       2,545       2,545
    Other Current Liabilities                    732       3,843       4,069       4,303       4,552       4,816       5,096
                                            --------    --------    --------    --------    --------    --------    --------
Total Current Liabilities                     28,372      35,893      37,672      39,520      41,481      43,562      45,772

Long Term Debt                                12,884       6,159       6,159       6,159       6,159       6,159       6,159
Other Liabilities                                 90         102         108         115         121         128         136
Deferred Income Taxes Payable                    278          --          --          --          --          --          -- 
Revolver                                          --          --          --          --          --          --          --
                                            --------    --------    --------    --------    --------    --------    --------
    Total Liabilities                         41,624      42,155      43,940      45,794      47,761      49,850      52,067

Total Shareholders' Equity                    58,835      65,216      67,920      71,623      76,158      81,757      88,265
                                            --------    --------    --------    --------    --------    --------    --------
Total Liabilities & Shareholder's Equity    $100,458    $107,370    $111,860    $117,417    $123,919    $131,606    $140,332
                                            ========    ========    ========    ========    ========    ========    ========

CALCULATIONS

- ----------------------------------------------------------------------------------------------------------------------------
Net Working Capital                           29,702      29,254      30,972      32,755      34,647      36,656      38,789
Capital Expenditures                                                   6,246       8,500       9,000       9,500      10,000
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>   31

PROJECT TREADCO
TREADCO-Statement of Cash Flow
================================================================================
(Dollars in Thousands, Except Per Share)
<TABLE>
<CAPTION>
                                           FYE Dec. 31,                Projected FY Ended December 31, 
                                           -----------  --------------------------------------------------------
                                              1998        1999        2000        2001        2002        2003
                                            --------    --------    --------    --------    --------    --------
<S>                                         <C>         <C>         <C>         <C>         <C>         <C>     
Net Income (Loss)                           $    978    $  2,704    $  3,703    $  4,534    $  5,599    $  6,508
Depreciation & Amortization                    6,184       7,092       6,935       6,809       6,349       6,009

Change in Current Assets                      (3,921)     (3,496)     (3,631)     (3,853)     (4,090)     (4,342)
Change in Accounts Payable                       761       1,051       1,092       1,158       1,229       1,305
Change in Accrued Liabilities                    496         503         522         554         588         624
Change in Other Current Liabilities            3,112         226         234         249         264         280
Change Other Assets                             (497)         --          --          --          --          --
Change Other Liabilities                          13           6           6           7           7           7
Change in Deferred Income Taxes Receivable      (146)         (9)         (9)         (9)        (10)        (11)
Change in Deferred Income Taxes Payable         (278)         --          --          --          --          --
                                            --------    --------    --------    --------    --------    --------
    Total Operating Changes                    6,702       8,077       8,852       9,448       9,936      10,382

Capital Expenditures                          (7,517)     (6,246)     (8,500)     (9,000)     (9,500)    (10,000)
Fixed Asset Adjustment                        (1,189)         --          --          --          --           0
Net Change in Noncompete Assets                  174          --          --          --          --          --
                                            --------    --------    --------    --------    --------    --------
    Total Investing Changes                   (1,831)      1,830         352         448         436         382

Net Change in Short Term Debt                  2,912          --          --          --          --          --
Net Change in Current Portion of LT Debt         240          --          --          --          --          --
Net Change in Long Term Debt                  (6,724)         --          --          --          --          --
Net change in Revolver (a)                        --          --          --          --          --          --
Net Change in Shareholder's Equity             5,404          --          (0)         --          --          --
                                            --------    --------    --------    --------    --------    --------
    Total Financing Changes                       --       1,830         352         448         436         382

Beginning Cash Balance                            --          --       1,830       2,183       2,631       3,067
                                            --------    --------    --------    --------    --------    --------
Ending Cash Balance                         $     --    $  1,830    $  2,183    $  2,631    $  3,067    $  3,449
                                            ========    ========    ========    ========    ========    ========
</TABLE>


(a)  Revolver assumes a minimum cash balance of $0 Million.
   
<PAGE>   32
PROJECT TREADCO
TREADCO Revised Projections-Historical and Projected Income Statement Detail
- -----------------------------------------------------------------------------
(Dollars in Thousands, Except Per Share)

<TABLE>
<CAPTION>
                                        FYE Dec. 31,                             Projected FY Ended December 31,
                                 --------------------------    --------------------------------------------------------------------
                                    1997           1998(a)        1999           2000          2001           2002          2003
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
<S>                              <C>             <C>           <C>            <C>           <C>            <C>           <C>
SALES                                        
Recaps-Treadco Castings          $   26,309      $   28,360    $   30,710     $   32,552    $   34,505     $   36,576    $   38,770
Recaps-Customer                      35,954          39,475        41,266         43,742        46,366         49,148        52,097
Used Tires                            3,063           2,998         3,071          3,194         3,322          3,454         3,593
New Tires                            77,815          87,820        92,129         96,735       101,572        106,651       111,983
Service                              12,214          15,063        16,890         18,579        20,437         22,481        24,729
Accessories                           2,352           3,405         3,455          3,593         3,737          3,886         4,042
Wheel Refurbishing                      376             433           384            399           415            432           449
National Sales                        3,194           3,740         4,031          4,192         4,360          4,534         4,715
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
     Total Sales                    161,276         181,293       191,935        202,987       214,714        227,162       240,378

COST OF SALES
Recaps                               46,270          48,415        52,038         54,932        58,228         61,293        64,970
Recapping Efficiency                  1,452             991        (1,224)        (1,538)       (1,686)        (1,501)       (1,472)
Used Tires                            2,417           2,106         2,202          2,284         2,375          2,470         2,569
New Tires                            68,065          75,869        80,152         84,160        88,368         92,786        97,425
New Tire Volume Bonus                (3,877)         (5,541)       (5,067)        (5,320)       (5,586)        (5,866)       (6,159)
New Tire Shrinkage                     (417)            262           369            387           406            427           448
Service                               9,833          12,078        13,174         14,120        15,124         16,411        17,805
Accessories                           1,740           2,272         2,246          2,300         2,392          2,487         2,587
Wheel Refurbishing                      212             260           231            240           249            259           269
National Account Costs                   --              --            --             --            --             --            --
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
     TOTAL COST OF SALES            125,695         136,713       144,121        151,563       159,868        168,766       178,442

GROSS PROFIT                         35,581          44,580        47,814         51,424        54,846         58,396        61,936

SELLING GENERAL & ADMINISTRATIVE
General Office Charges                6,238           7,660         7,294          7,825         8,293          8,750         9,241
Advertising                              63              78            68             61            64             68            72
Manager & Office Salaries             5,335           5,668         5,923          6,219         6,530          6,856         7,199
Salesman Salaries                     5,909           7,288         7,732          8,691         9,269          9,869        10,467
Warehouse & Delivery Labor            1,807           2,260         2,207          2,295         2,387          2,482         2,581
Insurance                             1,231           1,610         1,586          1,421         1,503          1,590         1,683
Health & Welfare                      1,584           1,568         1,602          1,491         1,580          1,673         1,767
Legal                                     9               5             9              8             9              9            10
Collection Expense                       44              47            52             51            54             57            60
Audit                                    97              95            74             51            54             57            60
Office Expense                          562             672           768            812           859            909           962
Stationary                              192              71            68             61            64             68            72
Payroll Taxes                         1,052           1,271         1,282          1,193         1,264          1,338         1,413
Tax & License                         1,051           1,079         1,173          1,218         1,288          1,363         1,442
Telephone                               521             485           498            609           644            681           721
Travel & Entertainment                  258             314           328            406           429            454           481
Truck Expense                         3,048           3,158         3,097          3,248         3,435          3,635         3,846
Bad Debt                              2,341           1,450         1,133          1,218         1,288          1,363         1,442
Interest                                 --              --            --             --            --             --            --
Miscellaneous Income                   (425)           (152)         (138)          (122)         (129)          (136)         (144)
Miscellaneous Expense                   264             316           384            406           429            454           481
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
     TOTAL SG&A                      31,181          34,944        35,137         37,160        39,315         41,540        43,856

OPERATING CASH FLOW                   4,400           9,637        12,677         14,264        15,530         16,856        18,081

Bonus                                   915             961           605            662           735            823           940
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
EBITDA                                3,485           9,850        12,072         13,602        14,796         16,034        17,141
Depreciation                          5,576           6,184         6,630          6,473         6,347          5,887         5,547
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
EBITA                                (2,092)          3,666         5,442          7,129         8,449         10,147        11,593

OTHER
Goodwill-Amortization                   462             462           462            462           462            462           462
Interest Expense                      1,256           1,125           947            920           893            867           842
Interest Income                         (44)            (40)          (33)           (32)          (31)           (30)          (29)
Miscellaneous                           396          (9,082)           --             --            --             --            --
(Gain) Loss on sale of 
      assets                           (284)           (448)         (296)(b)       (194)         (189)          (183)         (178)
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
     TOTAL OTHER                      1,786          (7,982)        1,080          1,155         1,135          1,116         1,097

INCOME BEFORE TAXES                  (3,878)          1,392         4,361          5,973         7,313          9,031        10,497

Provision for Income Taxes           (1,897)            958         1,657          2,270         2,779          3,432         3,989
Deferred Taxes                          524            (544)           --             --            --             --            --
                                 ----------      ----------    ----------     ----------    ----------     ----------    ----------
NET INCOME (LOSS)                $   (2,504)     $      978    $    2,704     $    3,703    $    4,534     $    5,599        $6,508
                                 ==========      ==========    ==========     ==========    ==========     ==========    ==========
Earnings Per Share                    (0.49)           0.19          0.53           0.73          0.89           1.10          1.28
Weighed Average Common Shares
 (In Thousands)                   5,072.255       5,072.255     5,072.255      5,072.255     5,072.255      5,072.255     5,072.255

General Office Charges
     Salary                                                    $    2,071     $    2,195    $    2,327     $    2,467    $    2,615
     Payroll Taxes                                                    170            176           186            197           209
     Insurance                                                        150            304           322            341           361
     Health & Welfare                                                 248            220           233            247           261
     Office Expenses                                                  769            812           859            909           962
     Travel                                                           498            507           537            568           601
     Telephone                                                         91             81            86             91            96
     Contribution                                                      --             --            --             --            --
     Directors Fee                                                    103            103           108            108           108
     Directors Expenses                                                24             25            25             26            27
     Service Fee                                                    1,291          1,291         1,330          1,330         1,330
     Programming & Processing                                       1,491          1,640         1,804          1,984         2,183
     Depreciation                                                     129            132           134            137           140
     Legal                                                            180            180           180            180           180
     Fees                                                             156            159           162            166           169
                                                               ----------     ----------    ----------     ----------    ----------
          Total                                                $    7,371     $    7,825    $    8,293     $    8,750    $    9,241

Growth Rates                                                                                                                     
- ------------------------------------------------------------------------------------------------------------------------------------
Sales                                            12.4%                5.9%           5.8%          5.8%           5.8%          5.8%
EBITDA                                           182.7%              22.6%          12.7%          8.8%           8.4%          6.9%
EBITA                                            NM                  48.3%          31.0%         18.5%          20.1%         14.3%
Net Income                                       NM                 176.6%          37.0%         22.4%          22.3%         16.2%
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(a) Excludes impact of the settlement of the Bandag Lawsuit.
(b) Excludes one-time extraordinary gain from sale of Springdale property.
<PAGE>   33
PROJECT TREADCO
TREADCO Revised Projections - Historical and Projected Income Statement Detail
================================================================================
Conservative Assumptions

<TABLE>
<CAPTION>
                                                  Projected FY Ended December 31,
                                                ------------------------------------
                                       1999      2000      2001      2002      2003
                                      ------    ------    ------    ------    ------   
<S>                                   <C>       <C>       <C>       <C>       <C>      <C>
SALES
Recaps- Treadco Casings                 8.3%      6.0%      6.0%      6.0%      6.0%   Annual Revenue Growth
Recaps - Customer                       4.5%      6.0%      6.0%      6.0%      6.0%   Annual Revenue Growth
Used Tires                              2.4%      4.0%      4.0%      4.0%      4.0%   Annual Revenue Growth
New Tires                               4.9%      5.0%      5.0%      5.0%      5.0%   Annual Revenue Growth
Service                                12.1%     10.0%     10.0%     10.0%     10.0%   Annual Revenue Growth
Accessories                             1.5%      4.0%      4.0%      4.0%      4.0%   Annual Revenue Growth
Wheel Refurbishing                    (11.3)%     4.0%      4.0%      4.0%      4.0%   Annual Revenue Growth
National Sales                          7.8%      4.0%      4.0%      4.0%      4.0%   Annual Revenue Growth

COST OF SALES
Recaps                                 72.3%     72.0%     72.0%     71.5%     71.5%   % of Recaps Sales
Recapping Efficiency                    3.2%      2.4%      2.0%      1.6%      1.2%   % of Recaps Sales Minus Depreciation
Used Tires                             71.7%     71.5%     71.5%     71.5%     71.5%   % of Used Tires Sales
New Tires                              87.0%     87.0%     87.0%     87.0%     87.0%   % of New Tire Sales
New Tire Volume Bonus                  (5.5)%    (5.5)%    (5.5)%    (5.5)%    (5.5)%  % of New Tire Sales
New Tire Shrinkage                      0.4%      0.4%      0.4%      0.4%      0.4%   % of New Tire Sales
Service                                78.0%     76.0%     74.0%     73.0%     72.0%   % of Service
Accessories                            65.0%     64.0%     64.0%     64.0%     64.0%   % of Accessories
Wheel Refurbishing                     60.1%     60.0%     60.0%     60.0%     60.0%   % of Wheel Refurbishing
National Account Costs                  0.0%      0.0%      0.0%      0.0%      0.0%   Added Back to Sales

SELLING GENERAL & ADMINISTRATIVE
General Office Charges                  3.8%      3.9%      3.9%      3.9%      3.8%   Per Schedule Below (% of Total Sales)
Advertising                             0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Manager & Office Salaries               4.5%      5.0%      5.0%      5.0%      5.0%   Grows 5% per year
Salesmen Salaries                      16.2%     16.9%     16.9%     16.9%     16.9%   As a % of Gross Profit
Warehouse & Delivery Labor             (2.4)%     4.0%      4.0%      4.0%      4.0%   Grows 4% per year
Insurance                               0.8%      0.7%      0.7%      0.7%      0.7%   As a % of Total Sales
Health & Welfare                       11.7%     10.0%     10.0%     10.0%     10.0%   As a % of Payroll
Legal                                   0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Collection Expense                      0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Audit                                   0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Office Expense                          0.4%      0.4%      0.4%      0.4%      0.4%   As a % of Total Sales
Stationery                              0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Payroll Taxes                           9.4%      8.0%      8.0%      8.0%      8.0%   As a % of Payroll
Tax & Licenses                          0.6%      0.6%      0.6%      0.6%      0.6%   As a % of Total Sales
Telephone                               0.3%      0.3%      0.3%      0.3%      0.3%   As a % of Total Sales
Travel & Entertainment                  0.2%      0.2%      0.2%      0.2%      0.2%   As a % of Total Sales
Truck Expenses                          1.6%      1.6%      1.6%      1.6%      1.6%   As a % of Total Sales
Bad Debt                                0.6%      0.6%      0.6%      0.6%      0.6%   As a % of Total Sales
Interest                                0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Miscellaneous Income                   (0.1)%    (0.1)%    (0.1)%    (0.1)%    (0.1)%  As a % of Total Sales
Miscellaneous Expense                   0.2%      0.2%      0.2%      0.2%      0.2%   As a % of Total Sales

Bonus                                  10.0%      8.5%      8.0%      7.5%      7.5%   Aa a % of operating income

Depreciation                            1.6%      1.5%      1.4%      1.3%      1.2%   As a % of Total Sales

OTHER
Interest Expense                        0.5%      0.5%      0.4%      0.4%      0.4%   As a % of Total Sales
Interest Income                         0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
Miscellaneous                           0.0%      0.0%      0.0%      0.0%      0.0%   As a % of Total Sales
(Gain) Loss on sale of assets          (0.2)%    (0.1)%    (0.1)%    (0.1)%    (0.1)%  As a % of Total Sales

Provision for Income Taxes             38.0%     38.0%     38.0%     38.0%     38.0%   % of Pretax Income
Deferred Taxes                          0.0%      0.0%      0.0%      0.0%      0.0%

General Office Charges
  Salary                                          6.0%      6.0%      6.0%      6.0%   % Increase
  Payroll Taxes                                   8.0%      8.0%      8.0%      8.0%   As a % of Payroll
  Insurance                                       0.2%      0.2%      0.2%      0.2%   As a % of Sales
  Health & Welfare                               10.0%     10.0%     10.0%     10.0%   As a % of Payroll
  Office Expense                                  0.4%      0.4%      0.4%      0.4%   As a % of Sales
  Travel                                          0.3%      0.3%      0.3%      0.3%   As a % of Sales
  Telephone                                       0.0%      0.0%      0.0%      0.0%   As a % of Sales
  Contribution                                    0.0%      0.0%      0.0%      0.0%   As a % of Sales
  Directors Fee                                   0.0%      5.0%      0.0%      0.0%   % Increase
  Directors Expenses                              3.0%      3.0%      3.0%      3.0%   % Increase
  Service Fee                                     0.0%      3.0%      0.0%      0.0%   % Increase
  Programming & Processing                       10.0%     10.0%     10.0%     10.0%   % Increase
  Depreciation                                    2.0%      2.0%      2.0%      2.0%   % Increase
  Legal                                           0.0%      0.0%      0.0%      0.0%   % Increase
  Fees                                            2.0%      2.0%      2.0%      2.0%   % Increase
</TABLE>
<PAGE>   34




================================================================================


                                   APPENDIX B
                      COMPARABLE PUBLICLY TRADED COMPANIES


================================================================================


<PAGE>   35
                                                                     PAGE 1 OF 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES           
- --------------------------------------------------------------------------------
(Dollars in Millions, Except Per Share)

<TABLE>
<S>                               <C>        <C>            <C>                                              <C>
Ticker                                            TBCC
Company Name                                  TBC CORP         TBC Corp distributes tires for the
                                                            automotive replacement market through
Latest Market Price as of         3/10/99      $  5.69      wholesale and retail customers in the
               52 Week High        4/1/98        10.25      U.S., Canada and Mexico; and franchises
               52 Week Low         9/1/98         4.25      and/or operates 415 retail tire and                TWO-YEAR HISTORICAL 
                                                            automotive service stores located mainly         STOCK PRICE PERFORMANCE
Shares Outstanding                                21.2      in the Midwest and Western U.S.
Options Outstanding                                1.1                                                               [CHART]
Weighted Average Exercise Price                $  8.84      Market Capitalization/
                                                                 LTM Net Income                     7.1 x
Market Capitalization                          $ 120.4           I/B/E/S Projected Current EPS      6.3
Total Market Capitalization (a)                  241.9           I/B/E/S Projected Next Fiscal EPS  5.7
                                                                 LTM Common Equity                  0.9
Latest Twelve Months Ended                       12/98           LTM Cash Flow (b)                  5.0
Latest Fiscal Year Ended                         12/98
I P O Date                                     11/5/84      Total Market Capitalization (a)/
                                                                 LTM EBITA (c)                      7.0 x
I/B/E/S Projected Current EPS (c)(d)           $  0.91           LTM EBITDA (f)                     5.9
I/B/E/S Projected Next Fiscal EPS (c)(d)       $  1.00           LTM Revenue                        0.4
</TABLE>
 
<TABLE>
<CAPTION>
                                             Gross         Net Other                     Deprec.                     Net Interest 
                              Revenue        Profit         Income        EBITA (e)     & Amort (g)    EBITDA (f)     Expense (h) 
                              -------        ------        ---------      ---------     -----------    ----------    ------------
<S>                           <C>            <C>           <C>            <C>           <C>            <C>           <C>
LTM                           $ 646.1        $ 102.9        $  1.5         $ 34.6         $ 7.2         $ 40.9          $ 5.9     

LFY                             646.1          102.9           1.5           34.6           7.2           40.9            5.9     
LFY-1                           642.9           98.7           3.3           37.8           7.7           45.1            5.8
LFY-2                           604.6           76.0           2.8           29.5           6.3           35.8            4.1 
LFY-3 (q)                       547.8           59.1           2.3           27.9           4.6           32.5            3.1
LFY-4 (q)                       563.7           63.6           2.9           29.9           4.1           34.0            1.4

4 Year Compound Growth            3.5 %         12.8 %       (15.0) %         3.7 %        15.0 %          4.7 %         44.0 %

<CAPTION>
                               Net            Cash            Earnings
                              Income         Flow (b)        Per Share (c)
                              ------         --------        -------------
<S>                           <C>            <C>             <C>            
LTM                           $ 16.9         $ 24.1            $ 0.75

LFY                             16.9           24.1              0.75
LFY-1                           19.7           27.4              0.84
LFY-2                           15.5           21.8              0.65
LFY-3 (q)                       15.2           19.9              0.62
LFY-4 (q)                       19.5           23.6              0.71

4 Year Compound Growth          (3.6) %         0.4 %             1.4 %                                  
</TABLE>                                        
         
<TABLE>                               
<CAPTION>
                                                                                          Total                          Net
                              Common         Preferred      Long-Term     Short-Term     Long-Term        Total        Working
                              Equity          Equity         Debt (l)        Debt        Capital (j)    Capital (k)    Capital (l)
                              -------        ---------       --------     ----------     -----------    -----------    -----------
<S>                           <C>            <C>             <C>          <C>            <C>            <C>            <C>          
LTM                           $ 138.4        $   --          $  59.7        $  63.5       $ 198.1        $ 261.6        $ 167.6     
LTM - Previous Year (o)       $ 134.2        $   --          $  67.6        $  26.4       $ 201.8        $ 228.3        $ 155.9     
                                                    
LFY                             138.4            --             59.7           63.5         198.1          261.6          167.6     
LFY-1                           134.2            --             67.6           26.4         201.8          228.3          155.9     
LFY-2 (q)                       119.8            --             69.6           23.2         189.4          212.5          141.2     
LFY-3 (q)                       104.8            --              0.6           50.9         105.4          156.3          127.5     
LFY-4 (q)                       114.0            --             --             25.8         114.0          139.8          117.1     
LFY-5 (o,q)                     116.6            --             --             26.1         116.6          142.6          121.2     
                                                    
4 Year Compound Growth (p)        5.0 %           N/A %          N/A %         25.3 %        14.8 %         17.0 %          9.4 %   

<CAPTION>
                              Cash and 
                                Cash             Net           Total
                              Equiv. (m)       P, P & E      Assets (m)
                              ----------       --------      ----------
<S>                           <C>              <C>           <C>       
LTM                           $   1.7          $  44.1        $ 332.1     
LTM - Previous Year (o)       $   0.9          $  36.3        $ 264.0 
                              
LFY                               1.7             44.1          332.1
LFY-1                             0.9             36.3          264.0
LFY-2 (q)                        --               35.1          253.9
LFY-3 (q)                        --               19.1          180.0
LFY-4 (q)                        --               14.6          169.7
LFY-5 (o,q)                      --               15.4          166.7
                              
4 Year Compound Growth (p)        N/A %           31.8 %         18.3 % 
</TABLE>                                        
                                        
- -------------------------
(a)  Market capitalization plus total debt and preferred stock less cash and
     cash equivalents 
(b)  For comparative purposes, defined as net income plus depreciation and
     amortization. 
(c)  Primary EPS. 
(d)  Source: Institutional Brokers Estimate Survey mean estimate. 
(e)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(f)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(g)  Depreciation and amortization as shown on the cash flow statement.
(h)  Defined as total interest expense less interest income.

Continued on Next page
<PAGE>   36
                                                                     Page 2 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES
================================================================================

Company Name:             TBC CORP


<TABLE>
<CAPTION>
                                       As a Percentage of Revenue
                    ----------------------------------------------------------
                    Gross               Deprec.               Cash       Net  
                    Profit   EBITA(a)  & Amort.   EBITDA(b)   Flow(c)   Income
                    ------   --------  --------   ---------   -------   ------
<S>                <C>       <C>       <C>       <C>         <C>       <C>  
LTM                  15.9 %    5.4 %     1.1 %       6.3 %     3.7 %     2.6 %
                                                                              
LFY                  15.9      5.4       1.1         6.3       3.7       2.6  
LFY-1                15.4      5.9       1.2         7.0       4.3       3.1  
LFY-2                12.6      4.9       1.0         5.9       3.6       2.6  
LFY-3                10.8      5.1       0.8         5.9       3.6       2.8  
LFY-4                11.3      5.3       0.7         6.0       4.2       3.5  
                                                                              
5 Year Average       13.2 %    5.3 %     1.0 %       6.2 %     3.9 %     2.9 %
</TABLE>                                             


<TABLE>
<CAPTION>
                               Returns on Average                            Percent of Long Term Capitalization(d)
                    -------------------------------------------              --------------------------------------
                                          Total                   EBITDA/                                            Total Debt/  
                    Common              Long-Term     Total         Net          Common  Preferred    Long-Term         Total     
                    Equity    Assets    Capital(d)   Capital(e)   Interest       Equity    Equity      Debt(f)      Capitalization
                    ------    ------    ----------   ----------   --------       ------    ------      -------      --------------
<S>                 <C>       <C>       <C>          <C>          <C>            <C>       <C>         <C>           <C>     
LTM                 12.4 %     5.7 %       8.4 %       6.9 %        6.9 x         69.9 %    --   %      30.1 %           47.1 %  
                                                                                                                                 
LFY                 12.4       5.7         8.4         6.9          6.9           69.9      --          30.1             47.1    
LFY-1               15.5       7.6        10.1         8.9          7.8           66.5      --          33.5             41.2    
LFY-2               13.8       7.1        10.5         8.4          8.7           63.3      --          36.7             43.6    
LFY-3               13.9       8.7        13.9        10.3         10.5           99.5      --           0.5             32.9    
LFY-4               17.0      11.6        17.0        13.8         24.6          100.0      --          --               18.4    
                                                                                                                                 
5 Year Average      14.5 %     8.2 %      12.0 %       9.7 %       11.7 x         79.8 %    --   %      20.2 %           36.7 %  
</TABLE>


- ------------------------------------
(a)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(b)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization
(c)  For comparative purposes, defined as net income plus depreciation and
     amortization.
(d)  Does not include short-term debt.
(e)  Includes short-term debt.
(f)  Includes capitalized leases and redeemable preferred stock.


Continued From Previous Page
- ------------------------------------

(i)  Includes capitalized leases and redeemable preferred stock.
(j)  Does not include short-term debt.
(k)  Includes short-term debt.
(l)  Defined as total current assets less cash and cash equivalents minus
     current liabilities less short-term debt.
(m)  Includes short-term, marketable securities.
(n)  Excludes cash and cash equivalents
(o)  Used to calculate average return figures and LTM return figures.
(p)  Growth calculated for same period, LFY-4 through LFY, as income statement
     growth calculations.
(q)  Numbers were restated with no subsequent financials to confirm Factset data
     in designated historical years.


<PAGE>   37
                                                                     Page 1 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES           
================================================================================
(Dollars in Millions, Except Per Share)

<TABLE>
<S>                               <C>        <C>            <C>                                              <C>
Ticker                                            BDG
Company Name                               BANDAG,INC         Bandaq, Inc. makes retreading materials        
                                                            and equipment for its worldwide network of
Latest Market Price as of         3/10/99      $ 31.25      apx. 1,300 franchised dealerships that 
               52 Week High        4/3/98        59.75      produce and market retread tires and 
               52 Week Low       10/13/98        28.31      provide tire management services; and sells        TWO-YEAR HISTORICAL 
                                                            and services new and retread tires               STOCK PRICE PERFORMANCE
Shares Outstanding                                22.5                                     
Options Outstanding                                0.2                                                               [CHART]
Weighted Average Exercise Price                $ 23.13      Market Capitalization/
                                                                 LTM Net Income                     12.1 x
Market Capitalization                          $ 703.5           I/B/E/S Projected Current EPS      11.4
Total Market Capitalization (a)                  644.1           I/B/E/S Projected Next Fiscal EPS  10.6
                                                                 LTM Common Equity                   1.5
Latest Twelve Months Ended                       12/98           LTM Cash Flow (b)                   7.4
Latest Fiscal Year Ended                         12/98
I P O Date                                     11/5/84      Total Market Capitalization (a)/
                                                                 LTM EBITA (e)                       5.9 x
I/B/E/S Projected Current EPS (c)(d)           $  2.75           LTM EBITDA (f)                      4.7
I/B/E/S Projected Next Fiscal EPS (c)(d)       $  2.95           LTM Revenue                         0.6
</TABLE>
 
<TABLE>
<CAPTION>
                                             Gross         Net Other                     Deprec.                     Net Interest 
                              Revenue        Profit         Income        EBITA (e)     & Amort (g)    EBITDA (f)     Expense (h) 
                              -------        ------        ---------      ---------     -----------    ----------    ------------
<S>                           <C>            <C>           <C>            <C>           <C>            <C>           <C>
LTM                          $1,087.0        $ 419.2        $ 11.1        $ 110.0          $ 36.9       $ 137.3         $ 2.5

LFY                           1,087.0          419.2          11.1          110.0            36.9         137.3           2.5
LFY-1                           822.5          340.1          14.1          129.9            36.9         164.5           3.3
LFY-2                           756.9          314.8          12.1          133.0            34.6         166.6           1.2
LFY-3                           740.4          297.5          14.9          158.1            34.6         191.7           2.0
LFY-4                           650.6          273.2          15.1          152.0            35.3         187.3           2.1

4 Year Compound Growth           13.7 %         11.3 %        (7.4) %        (7.8) %          1.1 %       (7.5) %         4.1 %

<CAPTION>
                               Net            Cash            Earnings
                              Income         Flow (b)        Per Share (c)
                              ------         --------        -------------
<S>                           <C>            <C>             <C>            
LTM                           $ 58.0         $  94.9          $   2.58

LFY                             58.0            94.9              2.58
LFY-1                           74.8 (q)       111.7              3.27 (q)
LFY-2                           81.6           116.2              3.44
LFY-3                           97.0           131.6              3.82
LFY-4                           94.0           129.3              3.51

4 Year Compound Growth         (11.4) %         (7.5) %          (7.4) %                                 
</TABLE>                                        
         
<TABLE>                               
<CAPTION>
                                                                                          Total                          Net
                              Common         Preferred      Long-Term     Short-Term     Long-Term        Total        Working
                              Equity          Equity         Debt (i)        Debt        Capital (j)    Capital (k)    Capital (l)
                              -------        ---------       --------     ----------     -----------    -----------    -----------
<S>                           <C>            <C>             <C>          <C>            <C>            <C>            <C>          
LTM (r)                       $ 457.0        $   --          $  --          $   5.8       $ 457.0        $ 462.8        $ 222.5     
LTM - Previous Year (o)         463.4            --            123.2        $  99.7       $ 586.6        $ 686.3        $ 194.2     
                                                    
LFY (r)                         457.0            --             --              5.8         457.0          462.8          222.5     
LFY-1                           463.4            --            123.2           99.7         586.6          686.3          194.2     
LFY-2                           410.9            --             10.1            2.0         421.0          423.0           91.9     
LFY-3                           400.0            --             11.9            3.0         411.8          414.9          113.0     
LFY-4                           434.0            --             12.3            8.3         446.3          454.6           92.4     
LFY-5                           413.1            --             11.0           12.2         424.1          436.3           73.3     
                                                    
4 Year Compound Growth (p)        1.3 %           N/A %       (100.0) %        (8.5) %        0.6 %          0.4 %         24.6 %   

<CAPTION>
                              Cash and 
                                Cash             Net           Total
                              Equiv. (m)       P, P & E      Assets (n)
                              ----------       --------      ----------
<S>                           <C>              <C>           <C>       
LTM (r)                       $  65.2          $ 201.2        $ 693.0     
LTM - Previous Year (o)       $ 198.0          $ 197.6        $ 701.9 
                              
LFY (r)                          65.2            201.2          693.0
LFY-1                           198.0            197.6          701.9
LFY-2                           112.6            145.1          475.8
LFY-3                            96.5            144.9          457.7
LFY-4                           147.4            151.8          434.7
LFY-5                           152.5            146.6          398.2
                              
4 Year Compound Growth (p)      (18.5) %           7.3 %         12.4 % 
</TABLE>                                        
                                        
- -------------------------
(a)  Market capitalization plus total debt and preferred stock less cash and
     cash equivalents.
(b)  For comparative purposes, defined as net income plus depreciation and
     amortization. 
(c)  Primary EPS. 
(d)  Source: Institutional Brokers Estimate Survey mean estimate. 
(e)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(f)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(g)  Depreciation and amortization as shown on the cash flow statement.
(h)  Defined as total interest expense less interest income.

Continued on Next page
<PAGE>   38
                                                                     Page 2 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES
================================================================================

Company Name:             BANDAG INC


<TABLE>
<CAPTION>
                                       As a Percentage of Revenue
                    ----------------------------------------------------------
                    Gross               Deprec.               Cash       Net  
                    Profit   EBITA(a)  & Amort.   EBITDA(b)   Flow(c)   Income
                    ------   --------  --------   ---------   -------   ------
<S>                <C>       <C>       <C>       <C>         <C>       <C>  
LTM                  38.6 %   10.1 %     3.4 %      12.6 %     8.7 %     5.3 %
                                                                             
LFY                  38.6     10.1       3.4        12.6       8.7       5.3  
LFY-1                41.4     15.8       4.5        20.0      13.6       9.1  
LFY-2                41.6     17.6       4.6        22.0      15.4      10.8  
LFY-3                40.2     21.4       4.7        25.9      17.8      13.1  
LFY-4                42.0     23.4       5.4        28.8      19.9      14.4  
                                                                              
5 Year Average       40.7 %   17.6 %     4.5 %      21.9 %    15.1 %    10.6 %
</TABLE>                                             


<TABLE>
<CAPTION>
                               Return on Average                             Percent of Long-Term Capitalization(d)
                    -------------------------------------------              --------------------------------------
                                          Total                   EBITDA/                                            Total Debt/  
                    Common              Long-Term     Total         Net          Common  Preferred    Long-Term         Total     
                    Equity    Assets    Capital(d)   Capital(e)   Interest       Equity    Equity      Debt(f)      Capitalization
                    ------    ------    ----------   ----------   --------       ------    ------      -------      --------------
<S>                 <C>       <C>       <C>          <C>          <C>            <C>       <C>         <C>           <C>     
LTM                 12.6 %     8.3 %      11.1 %      10.1 %       54.9 x        100.0 %    --   %      --   %            1.3 %  
                                                                                                                                 
LFY                 12.6       8.3        11.1        10.1         54.9          100.0      --          --                1.3    
LFY-1               17.1      12.7        14.9        13.5         49.3           79.0      --          21.0             32.5    
LFY-2               20.1      17.5        19.6        19.5        134.8           97.6      --           2.4              2.9    
LFY-3               23.3      21.7        22.6        22.3         97.8           97.1      --           2.9              3.6    
LFY-4               22.2      22.6        21.6        21.1         88.1           97.3      --           2.7              4.5    
                                                                                                                                 
5 Year Average      19.1 %    16.6 %      18.0 %      17.3 %       85.0 x         94.2 %    --   %       5.8 %            8.9 %  
</TABLE>


- ------------------------------------
(a)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(b)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization
(c)  For comparative purposes, defined as net income plus depreciation and
     amortization.
(d)  Does not include short-term debt.
(e)  Includes short-term debt.
(f)  Includes capitalized leases and redeemable preferred stock.


Continued From Previous Page
- ------------------------------------

(i)  Includes capitalized leases and redeemable preferred stock.
(j)  Does not include short-term debt.
(k)  Includes short-term debt.
(l)  Defined as total current assets less cash and cash equivalents minus
     current liabilities less short-term debt.
(m)  Includes short-term, marketable securities.
(n)  Excludes cash and cash equivalents
(o)  Used to calculate average return figures and LTM return figures.
(p)  Growth calculated for same period, LFY-4 through LFY, as income statement
     growth calculations.
(q)  Excludes gain on sale of marketable securities of $95.1 million and a 
     non-recurring charge of $16.5 million tax effected at 40%.
(r)  Third quarter data used since 12/31/98 balance sheet not available.


<PAGE>   39
                                                                     Page 1 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES           
================================================================================
(Dollars in Millions, Except Per Share)

<TABLE>
<S>                               <C>        <C>            <C>                                              <C>
Ticker                                             SPD
Company Name                      STANDARD PRODUCTS CO      The Standard Products Co. makes rubber and
                                                            plastic engineering and high-volume production
Latest Market Price as of         3/10/99      $ 15.63      processes for automotive original equipment
               52 Week High       4/21/98        35.88      manufacturers, and the appliance, construction
               52 Week Low       10/21/98        14.25      and marine industries; and makes precure and       TWO-YEAR HISTORICAL 
                                                            old cure tread rubber for the truck tire         STOCK PRICE PERFORMANCE
Shares Outstanding                                16.1      retreading industry.           
Options Outstanding                                0.8                                                               [CHART]
Weighted Average Exercise Price                $ 27.44      Market Capitalization/
                                                                 LTM Net Income                     6.8 x
Market Capitalization                          $ 251.2           I/B/E/S Projected Current EPS      7.8
Total Market Capitalization (a)                  454.9           I/B/E/S Projected Next Fiscal EPS  6.3
                                                                 LTM Common Equity                  0.9
Latest Twelve Months Ended                       12/98           LTM Cash Flow (b)                  2.8
Latest Fiscal Year Ended                          6/98
I P O Date                                     11/5/84      Total Market Capitalization (a)/
                                                                 LTM EBITA (e)                      7.0 x
I/B/E/S Projected Current EPS (c)(d)           $  2.00           LTM EBITDA (f)                     4.0
I/B/E/S Projected Next Fiscal EPS (c)(d)       $  2.48           LTM Revenue                        0.4
</TABLE>
 
<TABLE>
<CAPTION>
                                             Gross         Net Other                     Deprec.                     Net Interest 
                              Revenue        Profit         Income        EBITA (e)     & Amort (g)    EBITDA (f)     Expense (h) 
                              -------        ------        ---------      ---------     -----------    ----------    ------------
<S>                           <C>            <C>           <C>            <C>           <C>            <C>           <C>
LTM                          $1,080.6        $ 152.2        $ (3.4)        $ 64.6         $52.6         $114.7          $12.8     

LFY                           1,101.3          166.0          (7.0)          83.0          55.1          135.6           12.4     
LFY-1                         1,108.3          145.5           0.1           81.9 (r)      53.1 (r)      129.5           12.9
LFY-2                         1,083.9          108.5           4.6           46.9          52.5           95.3           14.9 
LFY-3                           995.9           99.5          (0.2)          34.6 (s)      46.8           77.3           13.0
LFY-4                           872.4          119.4           2.1           61.3 (s)      40.5           97.7            9.1

4 Year Compound Growth            6.0 %          8.6 %         N/A  %         7.9 %         8.0 %          8.5 %          8.0 %

<CAPTION>
                               Net            Cash            Earnings
                              Income         Flow (b)        Per Share (c)
                              ------         --------        -------------
<S>                           <C>            <C>             <C>            
LTM                          $  37.2         $ 89.8            $ 2.31

LFY                             43.4           98.6              2.58
LFY-1                           38.1 (q)       91.3              2.27
LFY-2                           14.6           67.1              0.87
LFY-3                           20.1           66.9              1.20
LFY-4                           33.0           73.5              1.99

4 Year Compound Growth           7.1 %          7.6 %             6.7 %                                  
</TABLE>                                        
         
<TABLE>                               
<CAPTION>
                                                                                          Total                          Net
                              Common         Preferred      Long-Term     Short-Term     Long-Term        Total        Working
                              Equity          Equity         Debt (i)        Debt        Capital (j)    Capital (k)    Capital (l)
                              -------        ---------       --------     ----------     -----------    -----------    -----------
<S>                           <C>            <C>             <C>          <C>            <C>            <C>            <C>          
LTM                           $ 280.8        $   --          $ 142.9        $  60.7       $ 423.8        $ 484.5        $  79.9     
LTM - Previous Year (o)       $ 269.0        $   --          $ 121.7        $  19.5       $ 390.8        $ 410.2        $  60.7     
                                                    
LFY                             300.2            --             92.5           29.0         392.6          421.7           51.5     
LFY-1                           268.4            --            121.8           20.9         390.2          411.1           60.5     
LFY-2                           258.8            --            143.0            3.6         401.8          405.5           57.7     
LFY-3                           260.5            --            190.5            6.8         451.0          457.8          104.2     
LFY-4                           242.7            --            135.4           12.1         378.1          390.1          100.0     
LFY-5                           224.4            --            115.6           13.7         340.0          353.7           87.5     
                                                    
4 Year Compound Growth (p)        5.5 %           N/A %        (9.1) %         24.5 %         0.9 %          2.0 %        (15.3) %

<CAPTION>
                              Cash and 
                                Cash             Net           Total
                              Equiv. (m)       P, P & E      Assets (n)
                              ----------       --------      ----------
<S>                           <C>              <C>           <C>       
LTM                           $  --            $ 349.8        $ 723.4     
LTM - Previous Year (o)       $   5.4          $ 303.9        $ 665.2 
                              
LFY                               1.6            330.4          682.6
LFY-1                             7.0            303.0          684.9
LFY-2                            --              298.5          684.7
LFY-3                            19.5            269.4          682.3
LFY-4                            --              242.0          624.3
LFY-5                             5.5            224.4          559.3
                              
4 Year Compound Growth (p)        N/A %            8.1 %          2.3 % 
</TABLE>                                        
                                        
- -------------------------
(a)  Market capitalization plus total debt and preferred stock less cash and
     cash equivalents 
(b)  For comparative purposes, defined as net income plus depreciation and
     amortization. 
(c)  Primary EPS. 
(d)  Source: Institutional Brokers Estimate Survey mean estimate. 
(e)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(f)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(g)  Depreciation and amortization as shown on the cash flow statement.
(h)  Defined as total interest expense less interest income.

Continued on Next page
<PAGE>   40

                                                                     Page 2 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES
================================================================================

Company Name:             STANDARD PRODUCTS CO


<TABLE>
<CAPTION>
                                       As a Percentage of Revenue
                    ----------------------------------------------------------
                    Gross               Deprec.               Cash       Net  
                    Profit   EBITA(a)  & Amort.   EBITDA(b)   Flow(c)   Income
                    ------   --------  --------   ---------   -------   ------
<S>                <C>       <C>       <C>       <C>         <C>       <C>  
LTM                  14.1 %    6.0 %     4.9 %      10.6 %     8.3 %     3.4 %
                                                                              
LFY                  15.1      7.5       5.0        12.3       9.0       3.9  
LFY-1                13.1      7.4       4.8        11.7       8.2       3.4  
LFY-2                10.0      4.3       4.8         8.8       6.2       1.3  
LFY-3                10.0      3.5       4.7         7.8       6.7       2.0  
LFY-4                13.7      7.0       4.6        11.2       8.4       3.8  
                                                                              
5 Year Average       12.4 %    6.0 %     4.8 %      10.4 %     7.7 %     2.9 %
</TABLE>                                             


<TABLE>
<CAPTION>
                               Returns on Average                            Percent of Long Term Capitalization(d)
                    -------------------------------------------              --------------------------------------
                                          Total                   EBITDA/                                            Total Debt/  
                    Common              Long-Term     Total         Net          Common  Preferred    Long-Term         Total     
                    Equity    Assets    Capital(d)   Capital(e)   Interest       Equity    Equity      Debt(f)      Capitalization
                    ------    ------    ----------   ----------   --------       ------    ------      -------      --------------
<S>                 <C>       <C>       <C>          <C>          <C>            <C>       <C>         <C>           <C>     
LTM                 13.5 %     5.4 %       9.1 %       8.3 %        9.0 x        66.3 %     --   %      33.7 %           42.0 %  
                                                                                                                                 
LFY                 15.3       6.4        11.1        10.4         10.9          76.5       --          23.5             28.8    
LFY-1               14.5       5.6         9.6         9.3         10.0          68.8       --          31.2             34.7    
LFY-2                5.6       2.1         3.4         3.4          6.4          64.4       --          35.6             36.2    
LFY-3                8.0       3.1         4.8         4.7          5.9          57.8       --          42.2             43.1    
LFY-4               14.1       5.6         9.2         8.9         10.7          64.2       --          35.8             37.8    
                                                                                                                                 
5 Year Average      11.5 %     4.5 %       7.6 %       7.4 %        8.8 x        66.3 %     --   %      33.7 %           36.1 %  
</TABLE>


- ------------------------------------
(a)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(b)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(c)  For comparative purposes, defined as net income plus depreciation and
     amortization.
(d)  Does not include short-term debt.
(e)  Includes short-term debt.
(f)  Includes capitalized leases and redeemable preferred stock.


Continued From Previous Page
- ------------------------------------

(i)  Includes capitalized leases and redeemable preferred stock.
(j)  Does not include short-term debt.
(k)  Includes short-term debt.
(l)  Defined as total current assets less cash and cash equivalents minus
     current liabilities less short-term debt.
(m)  Includes short-term, marketable securities.
(n)  Excludes cash and cash equivalents.
(o)  Used to calculate average return figures and LTM return figures.
(p)  Growth calculated for same period, LFY-4 through LFY, as income statement
     growth calculations.
(q)  Goodwill amortization was calculated from the differences in balance sheet
     totals less any additional goodwill acquired that year.
(r)  Excludes non-recurring charge of $17.7 million.
(s)  Goodwill amortization totals were taken from 1996 due to inadequate
     disclosure to determine the annual figures. 
<PAGE>   41
                                                                     Page 1 of 2

TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES           
================================================================================
(Dollars in Millions, Except Per Share)

<TABLE>
<S>                               <C>        <C>            <C>                                              <C>
Ticker                                             CTR 
Company Name                      COOPER TIRE & RUBBER        COOPER TIRE & RUBBER CO. makes and 
                                                            sells automobile, truck and motorcycle
Latest Market Price as of         3/10/99     $  20.13      tires, inner tubes, vibration control 
               52 Week High       3/20/98        25.31      systems, hose and hose assemblies, and 
               52 Week Low       10/13/98        15.44      automotive sealing for the transportation          TWO-YEAR HISTORICAL 
                                                            industry.                                        STOCK PRICE PERFORMANCE
Shares Outstanding                                77.7      
Options Outstanding                                0.8                                                               [CHART]
Weighted Average Exercise Price               $  21.59      Market Capitalization/
                                                                 LTM Net Income                      12.3 x
Market Capitalization                         $1,562.8           I/B/E/S Projected Current EPS       11.3  
Total Market Capitalization (a)                1,734.5           I/B/E/S Projected Next Fiscal EPS   10.9  
                                                                 LTM Common Equity                    1.8  
Latest Twelve Months Ended                       12/98           LTM Cash Flow (b)                    7.1  
Latest Fiscal Year Ended                         12/98                                                     
I P O Date                                     11/5/84      Total Market Capitalization (a)/               
                                                                 LTM EBITA (e)                        8.1 x
I/B/E/S Projected Current EPS (c)(d)           $  1.78           LTM EBITDA (f)                       5.6  
I/B/E/S Projected Next Fiscal EPS (c)(d)       $  1.85           LTM Revenue                          0.9  
</TABLE>
 
<TABLE>
<CAPTION>
                                             Gross         Net Other                     Deprec.                     Net Interest 
                              Revenue        Profit         Income        EBITA (e)     & Amort (g)    EBITDA (f)     Expense (h) 
                              -------        ------        ---------      ---------     -----------    ----------    ------------
<S>                           <C>            <C>           <C>            <C>           <C>            <C>           <C>
LTM                         $ 1,876.1        $ 330.6        $  3.6         $ 213.4         $ 94.5       $ 307.9        $ 15.2     
                                                                                                                    
LFY                           1,876.1          330.6           3.6           213.4           94.5         307.9          15.2     
LFY-1                         1,813.0          314.6           3.9           212.9           94.5         307.4          15.7
LFY-2                         1,619.3          252.8           0.8           173.7           76.8         250.6           1.7 
LFY-3                         1,493.6          250.7           3.8           180.8           63.3         244.1           0.7
LFY-4                         1,403.2          277.3           2.3           210.8           55.6         266.4           2.7
                                                                                                                    
4 Year Compound Growth            7.5 %          4.5 %        12.3  %          0.3 %         14.2 %         3.7 %        54.4 %

<CAPTION>
                               Net            Cash            Earnings
                              Income         Flow (b)        Per Share (c)
                              ------         --------        -------------
<S>                           <C>            <C>             <C>            
LTM                          $ 127.0        $ 221.4            $ 1.64

LFY                            127.0          221.4              1.64
LFY-1                          124.9          219.3              1.55
LFY-2                          107.9          184.7              1.30
LFY-3                          112.8          176.1              1.35
LFY-4                          128.5          184.1              1.54

4 Year Compound Growth          (0.3) %         4.7 %             1.6 %                                  
</TABLE>                                        
         
<TABLE>                               
<CAPTION>
                                                                                          Total                          Net
                              Common         Preferred      Long-Term     Short-Term     Long-Term        Total        Working
                              Equity          Equity         Debt (i)        Debt        Capital (j)    Capital (k)    Capital (l)
                              -------        ---------       --------     ----------     -----------    -----------    -----------
<S>                           <C>            <C>             <C>          <C>            <C>            <C>            <C>          
LTM                           $ 867.9        $   --          $ 205.3        $   8.4      $ 1,073.2     $ 1,081.6        $ 342.9     
LTM - Previous Year (o)         833.6            --            205.5           11.3        1,039.1       1,050.4          312.6     
                                                    
LFY                             867.9            --            205.3            8.4        1,073.2       1,081.6          342.9     
LFY-1                           833.6            --            205.5           11.3        1,039.1       1,050.4          312.6     
LFY-2                           786.6            --             69.5           37.1          856.1         893.2          273.8     
LFY-3                           748.8            --             28.6            5.0          777.4         782.4          254.1     
LFY-4                           662.1            --             33.6            5.1          695.7         700.8          204.9     
LFY-5 (o)                       550.2            --             38.7            5.3          588.9         594.3          184.4     
                                                    
4 Year Compound Growth (p)        7.0 %           N/A %         57.2 %         13.1 %         11.4 %        11.5 %         13.7 %   

<CAPTION>
                              Cash and 
                                Cash             Net           Total
                              Equiv. (m)       P, P & E      Assets (n)
                              ----------       --------      ----------
<S>                           <C>              <C>           <C>       
LTM                           $  42.0          $ 885.3        $ 1,499.3   
LTM - Previous Year (o)          52.9            860.4          1,443.0 
                              
LFY                              42.0            885.3          1,499.3
LFY-1                            52.9            860.4          1,443.0
LFY-2                            19.5            792.4          1,253.6
LFY-3                            23.2            678.9          1,120.5
LFY-4                           103.3            549.6            936.4
LFY-5 (o)                        25.8            527.9            863.8
                              
4 Year Compound Growth (p)      (20.2) %          12.7 %           12.5 %
</TABLE>                                        
                                        
- -------------------------
(a)  Market capitalization plus total debt and preferred stock less cash and
     cash equivalents 
(b)  For comparative purposes, defined as net income plus depreciation and
     amortization. 
(c)  Primary EPS. 
(d)  Source: Institutional Brokers Estimate Survey mean estimate. 
(e)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(f)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(g)  Depreciation and amortization as shown on the cash flow statement.
(h)  Defined as total interest expense less interest income.

Continued on Next page
<PAGE>   42
                                                                     Page 2 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES
================================================================================

Company Name:             COOPER TIRE & RUBBER


<TABLE>
<CAPTION>
                                       As a Percentage of Revenue
                    ----------------------------------------------------------
                    Gross               Deprec.               Cash       Net  
                    Profit   EBITA(a)  & Amort.   EBITDA(b)   Flow(c)   Income
                    ------   --------  --------   ---------   -------   ------
<S>                <C>       <C>       <C>       <C>         <C>       <C>  
LTM                  17.6 %   11.4 %     5.0 %      16.4 %    11.8 %     6.8 %
                                                                              
LFY                  17.6     11.4       5.0        16.4      11.8       6.8  
LFY-1                17.4     11.7       5.2        17.0      12.1       6.9  
LFY-2                15.6     10.7       4.7        15.5      11.4       6.7  
LFY-3                16.8     12.1       4.2        16.3      11.8       7.6  
LFY-4                19.8     15.0       4.0        19.0      13.1       9.2  
                                                                              
5 Year Average       17.4 %   12.2 %     4.6 %      16.8 %    12.0 %     7.4 %
</TABLE>                                             


<TABLE>
<CAPTION>
                               Returns on Average                            Percent of Long Term Capitalization(d)
                    -------------------------------------------              --------------------------------------
                                          Total                   EBITDA/                                            Total Debt/  
                    Common              Long-Term     Total         Net          Common  Preferred    Long-Term         Total     
                    Equity    Assets    Capital(d)   Capital(e)   Interest       Equity    Equity      Debt(f)      Capitalization
                    ------    ------    ----------   ----------   --------       ------    ------      -------      --------------
<S>                 <C>       <C>       <C>          <C>          <C>            <C>       <C>         <C>           <C>     
LTM                 14.9 %     8.6 %      12.0 %      11.9 %       20.2 x         80.9 %    --   %      19.1 %           19.8 %  
                                                                                                                                 
LFY                 14.9       8.6        12.0        11.9         20.2           80.9      --          19.1             19.8    
LFY-1               15.4       9.3        13.2        12.8         19.6           80.2      --          19.8             20.6    
LFY-2               14.1       9.1        13.2        12.9        151.5           91.9      --           8.1             11.9    
LFY-3               16.0      11.0        15.3        15.2        350.2           96.3      --           3.7              4.3    
LFY-4               21.2      14.3        20.0        19.8         99.4           95.2      --           4.8              5.5    
                                                                                                                                 
5 Year Average      16.3 %    10.4 %      14.7 %      14.5 %      128.2 x         88.9 %    --   %      11.1 %           12.4 %  
</TABLE>


- ------------------------------------
(a)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(b)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(c)  For comparative purposes, defined as net income plus depreciation and
     amortization.
(d)  Does not include short-term debt.
(e)  Includes short-term debt.
(f)  Includes capitalized leases and redeemable preferred stock.


Continued From Previous Page
- ------------------------------------

(i)  Includes capitalized leases and redeemable preferred stock.
(j)  Does not include short-term debt.
(k)  Includes short-term debt.
(l)  Defined as total current assets less cash and cash equivalents minus
     current liabilities less short-term debt.
(m)  Includes short-term, marketable securities.
(n)  Excludes cash and cash equivalents
(o)  Used to calculate average return figures and LTM return figures.
(p)  Growth calculated for same period, LFY-4 through LFY, as income statement
     growth calculations.



<PAGE>   43

                                                                     Page 1 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES           
================================================================================
(Dollars in Millions, Except Per Share)

<TABLE>
<S>                               <C>        <C>            <C>                                              <C>
Ticker                                              GT
Company Name               GOODYEAR TIRE AND RUBBER CO         Goodyear Tire & Rubber Co develops,
                                                            makes and sells tires and related     
Latest Market Price as of         3/10/99      $ 50.69      transportation products; participates
               52 Week High       3/31/98        76.75      in various crude oil transportation    
               52 Week Low        2/26/99        45.44      and gathering activities, and makes                 TWO-YEAR HISTORICAL 
                                                            various industrial rubber and chemical           STOCK PRICE PERFORMANCE
Shares Outstanding                               155.9      products.                      
Options Outstanding                                8.2                                                               [CHART]
Weighted Average Exercise Price                $ 46.86      Market Capitalization/
                                                                 LTM Net Income                    10.1 x
Market Capitalization                         $7,933.2           I/B/E/S Projected Current EPS     11.7
Total Market Capitalization (a)                9,944.0           I/B/E/S Projected Next Fiscal EPS 10.2
                                                                 LTM Common Equity                  2.2
Latest Twelve Months Ended                        9/98           LTM Cash Flow (b)                  6.3
Latest Fiscal Year Ended                         12/97
I P O Date                                     11/5/84      Total Market Capitalization (a)/
                                                                 LTM EBITA (e)                      8.1 x
I/B/E/S Projected Current EPS (c)(d)           $  4.35           LTM EBITDA (f)                     5.8
I/B/E/S Projected Next Fiscal EPS (c)(d)       $  5.00           LTM Revenue                        0.8
</TABLE>
 
<TABLE>
<CAPTION>
                                       Gross         Net Other                     Deprec.                     Net Interest       
                         Revenue       Profit         Income        EBITA (e)     & Amort (g)    EBITDA (f)     Expense (h)       
                        ---------      --------      ---------      ---------     -----------    ----------    ------------       
<S>                     <C>            <C>           <C>            <C>           <C>            <C>           <C>                
LTM                     $12,781.0      $3,055.4       $ 63.7         $1,229.6 (q)   $ 477.5        $1,707.1       $ 133.3         
                                                                                                                                  
LFY                      13,155.1       3,109.2        (35.0)         1,184.7 (q)     469.3         1,654.0         119.5         
LFY-1                    13,112.8       3,086.1        (73.1)         1,122.9 (q)     460.8         1,583.7         128.6         
LFY-2                    13,165.9       3,072.3        (74.6)         1,060.8         434.9         1,495.7         135.0         
LFY-3                    12,288.2       3,016.8        (63.5)           995.1         410.3         1,405.4         129.4         
LFY-4                    11,643.4       2,930.4        (61.0)           947.3         392.9         1,340.2         162.4         
                                                                                                                                  
4 Year Compound Growth        3.1 %         1.5 %      (13.0) %           5.7 %         4.5 %           5.4 %        (7.4) %      
                                                
<CAPTION>
                                Net           Cash            Earnings
                               Income        Flow (b)        Per Share (c)
                              --------       --------        -------------
<S>                           <C>            <C>             <C>            
LTM                           $ 786.6 (q)    $1,264.1          $ 5.05

LFY                             717.8 (q)     1,187.1            3.58
LFY-1                           624.9 (q)     1,085.7            0.66
LFY-2                           611.0         1,045.9            4.02
LFY-3                           567.0           977.3            3.75
LFY-4                           488.7           881.6            3.33

4 Year Compound Growth           10.1 %           7.7 %           1.8 %                                  
</TABLE>                                        
         
<TABLE>                               
<CAPTION>
                                                                                          Total                          Net
                               Common         Preferred      Long-Term     Short-Term     Long-Term        Total        Working
                               Equity          Equity         Debt (i)        Debt        Capital (j)    Capital (k)    Capital (l)
                              ---------       ---------      ---------     ----------     -----------    -----------    -----------
<S>                           <C>            <C>             <C>          <C>            <C>            <C>            <C>          
LTM                           $3,669.3       $   --          $1,279.6       $  889.5      $ 4,948.9      $ 5,838.4      $ 2,242.5   
LTM - Previous Year (o)        3,540.7           --             927.4          529.8        4,468.1        4,997.9      $ 1,539.3   
                                                    
LFY                            3,395.5           --             844.5          506.7        4,240.0        4,746.7        1,161.0   
LFY-1                          3,279.1           --           1,132.2          244.5        4,411.3        4,655.8        1,264.8   
LFY-2                          3,281.7           --           1,320.0          226.7        4,601.7        4,828.4        1,063.7   
LFY-3                          2,803.2           --           1,108.7          226.9        3,911.9        4,138.8          771.5   
LFY-4                          2,300.8           --           1,065.9          354.1        3,366.7        3,720.8          865.3   
LFY-5 (o)                      1,930.3           --           1,471.1          473.6        3,401.4        3,875.0          833.1   
                                                    
4 Year Compound Growth (p)        10.2 %          N/A %          (5.7) %         9.4 %          5.9 %          6.3 %          7.6 % 

<CAPTION>
                              Cash and 
                                Cash             Net           Total
                              Equiv. (m)       P, P & E      Assets (n)
                              ----------       --------      ----------
<S>                           <C>              <C>           <C>       
LTM                           $ 158.3          $4,058.2      $10,520.9
LTM - Previous Year (o)         226.7           4,011.0        9,824.5
                              
LFY                             258.6           4,149.7        9,658.8
LFY-1                           238.5           4,067.9        9,433.3
LFY-2                           268.3           4,561.2        9,521.3
LFY-3                           250.9           4,382.8        8,872.4
LFY-4                           227.7           4,287.9        8,208.4
LFY-5 (o)                       304.0           4,363.6        8,259.7
                              
4 Year Compound Growth (p)        3.2 %            (0.8) %         4.2 % 
</TABLE>                                        
                                        
- -------------------------
(a)  Market capitalization plus total debt and preferred stock less cash and
     cash equivalents.
(b)  For comparative purposes, defined as net income plus depreciation and
     amortization. 
(c)  Primary EPS. 
(d)  Source: Institutional Brokers Estimate Survey mean estimate. 
(e)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(f)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(g)  Depreciation and amortization as shown on the cash flow statement.
(h)  Defined as total interest expense less interest income.

Continued on Next page
<PAGE>   44
                                                                     Page 2 of 2
TREADCO
COMPARISON OF SELECTED PUBLICLY-TRADED COMPARABLE COMPANIES
================================================================================

Company Name:             GOODYEAR TIRE & RUBBER CO


<TABLE>
<CAPTION>
                                       As a Percentage of Revenue
                    ----------------------------------------------------------
                    Gross               Deprec.               Cash       Net  
                    Profit   EBITA(a)  & Amort.   EBITDA(b)   Flow(c)   Income
                    ------   --------  --------   ---------   -------   ------
<S>                <C>       <C>       <C>       <C>         <C>       <C>  
LTM                  23.9 %    9.6 %     3.7 %      13.4 %     9.9 %     6.2 %
                                                                              
LFY                  23.6      9.0       3.6        12.6       9.0       5.5  
LFY-1                23.5      8.6       3.5        12.1       8.3       4.8  
LFY-2                23.3      8.1       3.3        11.4       7.9       4.6  
LFY-3                24.6      8.1       3.3        11.4       8.0       4.6  
LFY-4                25.2      8.1       3.4        11.5       7.6       4.2  
                                                                              
5 Year Average       24.0 %    8.4 %     3.4 %      11.8 %     8.2 %     4.7 %
</TABLE>                                             


<TABLE>
<CAPTION>
                               Returns on Average                            Percent of Long Term Capitalization(d)
                    -------------------------------------------              --------------------------------------
                                          Total                   EBITDA/                                            Total Debt/  
                    Common              Long-Term     Total         Net          Common  Preferred    Long-Term         Total     
                    Equity    Assets    Capital(d)   Capital(e)   Interest       Equity    Equity      Debt(f)      Capitalization
                    ------    ------    ----------   ----------   --------       ------    ------      -------      --------------
<S>                 <C>       <C>       <C>          <C>          <C>            <C>       <C>         <C>           <C>     
LTM                 21.8 %     7.7 %      16.7 %      14.5 %       12.8 x         74.1 %    --   %      25.9 %           37.2 %  
                                                                                                                                 
LFY                 21.5       7.5        16.6        15.3         13.8           80.1      --          19.9             28.5    
LFY-1               19.0       6.6        13.9        13.2         12.3           74.3      --          28.7             29.6    
LFY-2               20.1       6.6        14.4        13.6         11.1           71.3      --          28.7             32.0    
LFY-3               22.2       6.6        15.6        14.4         10.9           71.7      --          28.3             32.3    
LFY-4               23.1       5.9        14.4        12.9          8.3           68.3      --          31.7             38.2    
                                                                                                                                 
5 Year Average      21.2 %     6.7 %      15.0 %      13.9 %       11.3 x         73.1 %    --   %      26.9 %           32.1 %  
</TABLE>


- ------------------------------------
(a)  Earnings before interest, taxes, and amortization of selected intangibles.
     Selected intangible assets consist of goodwill, trademarks and non-compete
     agreements.
(b)  For comparative purposes, defined as earnings before interest and taxes
     plus depreciation and amortization.
(c)  For comparative purposes, defined as net income plus depreciation and
     amortization.
(d)  Does not include short-term debt.
(e)  Includes short-term debt.
(f)  Includes capitalized leases and redeemable preferred stock.


Continued From Previous Page
- ------------------------------------

(i)  Includes capitalized leases and redeemable preferred stock.
(j)  Does not include short-term debt.
(k)  Includes short-term debt.
(l)  Defined as total current assets less cash and cash equivalents minus
     current liabilities less short-term debt.
(m)  Includes short-term, marketable securities.
(n)  Excludes cash and cash equivalents.
(o)  Used to calculate average return figures and LTM return figures.
(p)  Growth calculated for same period, LFY-4 through LFY, as income statement
     growth calculations.
(q)  Excludes one time charges of $265.2 million and $872.0 million in 1997 and
     1996.

<PAGE>   45




================================================================================


                                   APPENDIX C

                            COMPARABLE ACQUISITIONS


================================================================================

<PAGE>   46
Stephens Inc.

                                    TREADCO
                  Analysis of Selected Comparable Acquisitions


Acquiror:             Goodyear Tire & Rubber

Target:               Brad Ragan, Inc.              Announcement Date:  10/23/97
Target's Location:    Charlotte, North Carolina     Closing Date:       12/24/98

                                              Date         Stock Price   Premium
Transaction Value(a):           $ 81.6        ----         -----------   -------
Total Transaction Value:        $121.3        Offer Price    $37.25       
                                              1 Day Prior     30.00       24.2% 
                                              30 Days Prior   29.00       28.4%

TARGET SUMMARY

     Brad Ragan, Inc. distributes new and retreaded off-the-road and trucktires
     through a network of 53 commercial outlets in 19 states. The company
     operates a chain of 116 retail stores in the southeast, featuring products
     and services for auto and home use.

TRANSACTION SUMMARY

     Goodyear acquired the remaining 556,924 shares of Brad Ragan, Inc. common
     stock it previously did not own for a cash purchase price of $37.25 per
     share. Shareholders of Brad Ragan, Inc. approved the sale per an agreement
     and Plan of Share Exchange between the companies.

TRANSACTION MULTIPLES

<TABLE>
<CAPTION>
          Latest Twelve Months Ended September 30, 1998,
                       (Dollars in Millions)                            Transaction Value(a)
          ----------------------------------------------         ---------------------------------      -------
           Net             Stockholders'          Cash            Net             Stockholders'          Cash
          Income               Equity            Flow(c)         Income               Equity            Flow(c)
          ------           -------------         -------         ------           -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM       $ 1.8                $49.4               $4.3          46.4 x                1.7 x             19.0 x

LFY         1.4                 48.2                3.7          
</TABLE>

<TABLE>
<CAPTION>
                                                                        Total Transaction Value(b)
                                                                 -------------------------------------- -------
           Total                                                  Total
          Revenues             EBITA             EBITDA          Revenues             EBITA             EBITDA
          --------         -------------         -------         --------         -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM        $267.7              $ 6.0               $8.6           0.5 x               20.1 x             14.1 x

LFY         259.6                5.3                7.5
</TABLE>

- ---------------
(a) As discussed in a Bloomberg acquisition detail.
(b) Defined as transaction value plus net debt assumed of $39.7.
(c) Defined as net income plus depreciation and amortization.
<PAGE>   47
Stephens Inc.

                                    TREADCO
                  Analysis of Selected Comparable Acquisitions


Acquiror:             TBC Corporation       

Target:               Big O Tires                   Announcement Date:  05/02/96
Target's Location:    Englewood, Colorado           Closing Date:       07/15/96

                                             Date          Stock Price   Premium
Transaction Value(a):           $56.0        ----          -----------   -------
Total Transaction Value(b):     $69.8        Offer Price     $16.47       
                                             1 Day Prior      15.31        7.6% 
                                             30 Days Prior    14.50       13.6%

TARGET SUMMARY

     Big O Tires franchises Big O Tire retail stores and supplies them with 
     tires, wheels and related replacement automotive parts. The Company is 
     active in promoting certain programs and sales techniques to its 
     franchises.
     
TRANSACTION SUMMARY

     Under the terms of the agreement, Big O stockholders received $16.47 in 
     cash for each share. Big O had 3.4 million shares outstanding, and the 
     total value of the transaction including assumptions of certain long-term
     liabilities is approximately $56 million. TBC Corporation acquired all
     outstanding shares of Big O Tires.

TRANSACTION MULTIPLES

<TABLE>
<CAPTION>
              Latest Twelve Months Ended March 31, 1996     
                       (Dollars in Millions)                            Transaction Value(a)
          ----------------------------------------------         ----------------------------------     -------
           Net             Stockholders'          Cash            Net             Stockholders'          Cash
          Income               Equity            Flow(c)         Income               Equity            Flow(c)
          ------           -------------         -------         ------           -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM       $ 1.9                $38.3               $3.1          29.6 x                1.5 x             17.8 x

LFY         1.5                 37.4                2.8
</TABLE>

<TABLE>
<CAPTION>
                                                                        Transaction Value(b)
                                                                 ----------------------------------     -------
           Total                                                  Total
          Revenues             EBITA             EBITDA          Revenues             EBITA             EBITDA
          --------         -------------         -------         --------         -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM        $146.1              $ 7.6               $8.8           0.5 x                9.2 x              7.9 x

LFY         142.1                7.2                8.5
</TABLE>

- ---------------
(a) As discussed in a Business Editors press release dated 07/10/96.
(b) Defined as transaction value plus net debt assumed of            $13.8.
(c) Defined as net income plus depreciation and amortization.
<PAGE>   48
Stephens Inc.

                                    TREADCO
                  Analysis of Selected Comparable Acquisitions


Acquiror:             Cooper Tire & Rubber

Target:               Avon Tyres plc                Announcement Date:  02/18/97
Target's Location:    United Kingdom                Closing Date:       03/01/97

                                             Date           Stock Price  Premium
Transaction Value(a):          $110.4        ----           -----------  -------
Total Transaction Value(b):    $135.5        Offer Price                  
                                             1 Day Prior    N/A          N/A 
                                             30 Days Prior  N/A          N/A

TARGET SUMMARY

     Avon Tyres products include passenger, light and medium truck tires, high
     performance and racing tires, motorcycle tires, industrial tires, tire 
     retreading and remoulding supplies.

TRANSACTION SUMMARY

     Cooper, through a wholly-owned UK subsidiary, acquired the tire operations
     of Avon Rubber plc of the United Kingdom. They bought the complete tire 
     business, which includes the land and plants in England, distribution 
     companies in France, Germany and Switzerland and the right to use the Avon
     name for $110.4 million.

TRANSACTION MULTIPLES

<TABLE>
<CAPTION>
          Latest Twelve Months Ended September 28, 1996
                     (Dollars in Millions)(c)                          Transaction Value(a)
          ----------------------------------------------         ---------------------------------      -------
           Net             Stockholders'          Cash            Net             Stockholders'          Cash
          Income               Equity            Flow(d)         Income               Equity            Flow(d)
          ------           -------------         -------         ------           -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM       $ 4.9                $70.9              $14.0          22.5 x               1.6 x              7.9 x

LFY         4.9                 70.9               14.0          
</TABLE>

<TABLE>
<CAPTION>
                                                                       Transaction Value(b)
                                                                 ---------------------------------      -------
           Total                                                  Total
          Revenues             EBITA             EBITDA          Revenues             EBITA             EBITDA
          --------         -------------         -------         --------         -------------         -------
          <S>              <C>                   <C>             <C>              <C>                   <C>

LTM        $173.5              $12.9              $21.9            0.8 x              10.5 x             6.2 x

LFY         173.5               12.9               21.9
</TABLE>

- ---------------
(a) As disclosed in a Business Editors press release dated 07/10/96.
(b) Defined as transaction value plus net debt assumed of             $25.1.
(c) Exchange rate of 1.5655 Dollars per British Pound assumed as of 09/28/96.
(d) Defined as net income plus depreciation and amortization.

<PAGE>   1
                                                                  EXHIBIT (b)(4)


                     [ARKANSAS BEST CORPORATION LETTERHEAD]



                                 March 15, 1999


Members of the Special Committee
of the Board of Directors of Treadco, Inc.:
Mr. Nicolas M. Georgitsis,
Mr. Robert B. Gilbert

Stephens Inc.
111 Center Street, Suite 2400
Little Rock, Arkansas 72203

Attention: Noel M. Strauss

         Re:  Treadco, Inc.

Ladies and Gentlemen:

         In connection with negotiation of the proposed acquisition of Treadco,
Inc. ("Treadco") by Arkansas Best Corporation ("ABC"), the management of Treadco
(i) has provided Stephens Inc. ("Stephens") in its capacity as financial advisor
to the Special Committee of the Board of Directors of Treadco, certain internal
nonpublic financial information including the management projections of Treadco
presented to the Board of Directors of Treadco on December 9, 1998 (the
"Management Projections") and (ii) provided input to Stephens in its preparation
of revised projections for Treadco (the "Revised Projections"). Management of
Treadco has also provided to ABC and Stephens the preliminary results of
operations of Treadco for the two months ended February 28, 1999 (the "YTD
Results").

         The Management Projections and the Revised Projections have been
furnished to and reviewed by ABC, and ABC has participated in discussions with
the management of Treadco and Stephens regarding the methodology and basis for
such projections, including inquiries of the management of Treadco it deemed
necessary or appropriate.

         Based on such review and inquiry as well as a review of the YTD
Results, ABC advises you that as of the date hereof and to the knowledge of ABC:
(i) the projected results of operations for the five year period ended December
31, 2003, taken as a whole, included in the Management Projections are not
significantly understated and (ii) there is no fact, circumstance, occurrence or
event not disclosed to Stephens in their preparation of the Revised Projections
that ABC believes would significantly impact Treadco's operating results for the
year ending December 31, 1999.

<PAGE>   2
Stephens Inc.
March 15, 1999
Page 2


         For the purposes hereof, "knowledge of ABC" shall mean the actual
knowledge of its executive officers and its officers or employees who are
officers or directors of Treadco.

         Actual results of Treadco could differ significantly from current
expectations due to a number of factors, including general economic conditions;
competitive initiatives and pricing pressures; labor relations; costs of raw
material; availability and cost of capital; shifts in market demand; weather
conditions; the performance and needs of industries served by Treadco's
businesses; actual future costs of operating expenses; self-insurance claims and
employee wages and benefits; actual costs of continuing investments in
technology; and the timing and amount of capital expenditures.


                                  Sincerely,

                                  ARKANSAS BEST CORPORATION


                                  By: /s/ DAVID E. LOEFFLER
                                     ---------------------------------------
                                     David E. Loeffler
                                     Vice President and Chief Financial Officer


Attachments


<PAGE>   1


                                                                  Exhibit (c)(2)

LETTER DATED 1/22/99 FROM SHAPIRO CAPITAL TO ABC


                                January 22, 1999


Arkansas Best Corporation
3801 Old Greenwood Road
Fort Smith, Arkansas 72903

     Re:      Treadco, Inc.

Gentlemen:

     You have advised the undersigned that Arkansas Best Corporation ("ABC") is
contemplating making a proposal to acquire the shares of the common stock of
Treadco, Inc. (the "Company") not owned by ABC at $9.00 per share in cash in a
transaction in which the Company would become a wholly owned subsidiary of ABC
again (the "Transaction"). The undersigned believes the $9.00 per share cash
price is fair and agrees to support the Transaction. In order to facilitate the
proposal and the Transaction, the undersigned hereby irrevocably appoints ABC,
with full power of substitution, as the proxy of the undersigned to attend any
and all meetings of stockholders of the Company and any adjournments or
postponements of such meetings (collectively, a "Meeting"), to vote for and in
the name, place and stead of the undersigned at any Meeting, or grant any
consents with respect to, 1,132,775 shares of the common stock of the Company,
beneficially owned (within the meaning of Rule 13d-3 of the Securities Exchange
Act of 1934, as amended) by the undersigned on the date of this proxy (the
"Proxy Shares"), with respect only to voting for or consenting to the approval
of the Transaction, any matters related to or in connection with the
Transaction, and voting against or withholding consent from any corporate action
the consummation of which would violate, frustrate the purpose of, or prevent or
delay the Transaction.

     The undersigned represents and warrants to ABC that (i) the undersigned is
the beneficial owner of the Proxy Shares; (ii) the undersigned has all necessary
power and authority to deliver this proxy; and (iii) none of the Proxy Shares is
subject to any proxy or voting trust or any other arrangement, or understanding
with respect to the voting of such shares in connection with the Transaction
other than this proxy. Notwithstanding anything herein to the contrary, the
undersigned may, and expressly reserves the right to, tender the Proxy Shares in
any tender offer made by ABC or the Company for the common stock of the Company
upon the terms and conditions of such tender offer.

     This proxy is coupled with an interest and is expressly made irrevocable
and will expire upon the earlier of (i) July 31, 1999, (ii) March 31, 1999 if
ABC and the Company have not entered into a definitive agreement regarding the
Transaction by such date or (iii) the


<PAGE>   2

consummation of the Transaction. The undersigned acknowledges that monetary
damages would be an inadequate remedy for a breach of the provisions of this
proxy and that (in addition to any other remedy available at law) the
obligations of the undersigned and the rights of the ABC are specifically
enforceable.

                                     Very truly yours,

                                     SHAPIRO CAPITAL MANAGEMENT
                                     COMPANY, INC.


                                     By: /s/ Samuel R. Shapiro
                                        -------------------------
                                        Samuel R. Shapiro
                                        President


<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                                 TREADCO, INC.
 
                                       AT
 
                              $9.00 NET PER SHARE
 
                                       BY
 
                           ARKANSAS BEST CORPORATION
 
    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
      CITY TIME, ON TUESDAY, APRIL 20, 1999, UNLESS THE OFFER IS EXTENDED.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I) THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER THAT NUMBER OF
SHARES REPRESENTING AT LEAST 66 2/3% OF ALL OUTSTANDING SHARES ON A FULLY
DILUTED BASIS WHEN AGGREGATED WITH THE SHARES OWNED BY ARKANSAS BEST CORPORATION
("PARENT"), WHICH CURRENTLY OWNS APPROXIMATELY 47% OF THE OUTSTANDING SHARES ON
A FULLY DILUTED BASIS, AND (II) THE EXPIRATION OR TERMINATION OF ALL APPLICABLE
WAITING PERIODS UNDER THE HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976,
AS AMENDED. THE OFFER IS ALSO SUBJECT TO OTHER TERMS AND CONDITIONS.
 
    THE BOARD OF DIRECTORS OF TREADCO, INC. (THE "COMPANY"), UPON THE
RECOMMENDATION OF A SPECIAL COMMITTEE OF INDEPENDENT DIRECTORS, HAS UNANIMOUSLY
APPROVED THE OFFER AND THE MERGER REFERRED TO HEREIN AND DETERMINED THAT THE
OFFER AND THE MERGER, TAKEN TOGETHER, ARE FAIR TO, AND IN THE BEST INTERESTS OF,
THE STOCKHOLDERS OF THE COMPANY (OTHER THAN PARENT) AND RECOMMENDS THAT
STOCKHOLDERS OF THE COMPANY ACCEPT THE OFFER AND TENDER THEIR SHARES.
                             ---------------------
 
                                   IMPORTANT
 
    Any stockholder desiring to tender all or any portion of such stockholder's
shares of common stock, par value $.01 per share of the Company (including the
associated common stock purchase rights) (collectively, the "Shares") should
either (i) complete and sign the Letter of Transmittal or a facsimile copy
thereof in accordance with the instructions in the Letter of Transmittal, have
such stockholder's signature thereon guaranteed if required by Instruction 1 to
the Letter of Transmittal, mail or deliver the Letter of Transmittal or such
facsimile and any other required documents to the Depositary and either deliver
the certificates for such Shares to the Depositary along with the Letter of
Transmittal or facsimile or deliver such Shares pursuant to the procedure for
book-entry transfer set forth in "THE TENDER OFFER -- Procedure for Tendering
Shares" or (ii) request such stockholder's broker, dealer, bank, trust company
or other nominee to effect the transaction for such stockholder. A stockholder
having Shares registered in the name of a broker, dealer, bank, trust company or
other nominee must contact such broker, dealer, bank, trust company or other
nominee if such stockholder desires to tender such Shares.
 
    A stockholder who desires to tender Shares and whose certificates for such
Shares are not immediately available or who cannot comply in a timely manner
with the procedure for book-entry transfer, or who cannot deliver all required
documents to the Depositary prior to the expiration of the Offer, may tender
such Shares by following the procedure for guaranteed delivery set forth in "THE
TENDER OFFER -- Procedure for Tendering Shares," including the Notice of
Guaranteed Delivery.
 
    Questions and request for assistance or for additional copies of this Offer
to Purchase, the Letter of Transmittal and the Notice of Guaranteed Delivery may
be directed to the Information Agent at the address and telephone number set
forth on the back cover of this Offer to Purchase.
 
    THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE FAIRNESS OR MERITS OF
SUCH TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF INFORMATION CONTAINED IN
THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.
 
March 23, 1999
 
                    THE INFORMATION AGENT FOR THE OFFER IS:
                             D.F. KING & CO., INC.
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                               PAGE
                                                               ----
<S>                                                            <C>
INTRODUCTION................................................     1
SPECIAL FACTORS.............................................     3
  Background of the Offer and the Merger....................     3
  Recommendation of the Special Committee and the Board of
     Directors; Fairness of the Offer and the Merger........     7
  Opinion of Financial Advisor..............................     9
  Position of Parent Regarding Fairness of the Offer and the
     Merger.................................................    12
  Certain Projections.......................................    13
  Purpose and Structure of the Transaction..................    14
  Plans for the Company After the Offer and the Merger......    14
  Certain Effects of the Offer and the Merger...............    14
  Interests of Certain Persons in the Offer and the
     Merger.................................................    16
  The Merger Agreement......................................    18
  Dissenters' Rights........................................    24
  Certain Federal Income Tax Consequences...................    25
THE TENDER OFFER............................................    25
  Terms of the Offer........................................    25
  Procedure for Tendering Shares............................    27
  Withdrawal Rights.........................................    29
  Acceptance for Payment and Payment for Shares.............    30
  Price Range of the Shares; Dividends......................    31
  Certain Information Concerning Parent and Newco...........    31
  Certain Information Concerning the Company................    33
  Available Information.....................................    35
  Source and Amount of Funds................................    35
  Dividends and Distributions...............................    36
  Certain Conditions of the Offer...........................    36
  Certain Legal Matters; Regulatory Matters.................    38
  Fees and Expenses.........................................    39
  Miscellaneous.............................................    40
ANNEXES
  ANNEX A -- Opinion of Stephens Inc........................   A-1
  ANNEX B -- Agreement and Plan of Merger...................   B-1
  ANNEX C -- Directors and Executive Officers of Parent and
     Newco..................................................   C-1
  ANNEX D -- Directors and Executive Officers of the
     Company................................................   D-1
  ANNEX E -- Text of Section 262 of the General Corporation
     Law of the State of Delaware...........................   E-1
</TABLE>
 
                                        i
<PAGE>   3
 
To the Holders of Common Stock of Treadco, Inc.:
 
                                  INTRODUCTION
 
     Arkansas Best Corporation, a Delaware corporation ("Parent") hereby offers
to purchase all outstanding shares of common stock, par value $.01 per share
(the "Common Stock"), including the associated common stock purchase rights (the
"Rights" and together with the Common Stock, the "Shares") issued pursuant to
the Rights Agreement (as defined below), of Treadco, Inc., a Delaware
corporation (the "Company"), at $9.00 per Share (the "Offer Price"), net to the
seller in cash, without interest, upon the terms and subject to the conditions
set forth in this Offer to Purchase and in the related Letter of Transmittal
(which, together with any amendments or supplements hereto or thereto,
collectively constitute the "Offer").
 
     Tendering stockholders will not be obligated to pay brokerage fees or
commissions or, except as set forth in Instruction 6 of the Letter of
Transmittal, transfer taxes on the purchase of Shares pursuant to the Offer.
Parent will pay all fees and expenses of Harris Trust Company of New York, which
is acting as the Depositary (the "Depositary"), and D.F. King & Co., Inc. which
is acting as Information Agent (the "Information Agent"), incurred in connection
with the Offer. See "THE TENDER OFFER -- Fees and Expenses."
 
     THE BOARD OF DIRECTORS OF THE COMPANY (THE "BOARD"), BASED, AMONG OTHER
THINGS, ON THE UNANIMOUS RECOMMENDATION OF A SPECIAL COMMITTEE OF INDEPENDENT
DIRECTORS OF THE BOARD (THE "SPECIAL COMMITTEE"), HAS UNANIMOUSLY APPROVED THE
OFFER AND THE MERGER (AS DEFINED BELOW) AND DETERMINED THAT THE OFFER AND THE
MERGER, TAKEN TOGETHER, ARE FAIR TO, AND IN THE BEST INTERESTS OF, THE
STOCKHOLDERS OF THE COMPANY (OTHER THAN PARENT) AND RECOMMENDS THAT STOCKHOLDERS
OF THE COMPANY ACCEPT THE OFFER AND TENDER THEIR SHARES PURSUANT TO THE OFFER.
 
     The Special Committee was recently formed to review and consider a proposal
(the "Proposal") from Parent, which currently owns approximately 49% of the
outstanding Shares (47% of the outstanding Shares on a fully diluted basis),
that the Shares not owned by Parent be acquired for $9.00 in cash per Share.
Stephens Inc., financial advisor to the Special Committee ("Stephens"), has
delivered to the Special Committee and the Board its written opinion to the
effect that, as of the date of such opinion, the $9.00 in cash to be received by
the holders of the Shares (other than Parent and its affiliates, directors,
officers and employees of the Company, and any holders of more than 10% of the
aggregate Shares outstanding (the "Disinterested Stockholders")) in each of the
Offer and the Merger is fair to the Disinterested Stockholders, from a financial
point of view. Such opinion is set forth in full as ANNEX A hereto. Stockholders
should read the full text of Stephens' opinion for a description of the
assumptions made, matters considered and procedures followed in rendering such
opinion. See "SPECIAL FACTORS -- Opinion of Financial Advisor." See "SPECIAL
FACTORS -- Recommendation of the Special Committee and the Board of Directors;
Fairness of the Offer and the Merger" for the various factors considered by the
Special Committee in approving the Offer and the Merger and in unanimously
recommending that the Board approve the Offer and the Merger.
 
     The Company has filed with the Securities and Exchange Commission (the
"Commission") a Solicitation/Recommendation Statement on Schedule 14D-9 under
the Securities Exchange Act of 1934, as amended (the "Exchange Act") which is
being mailed to stockholders of the Company herewith.
 
     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (I) THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION DATE (AS DEFINED IN "THE
TENDER OFFER -- TERMS OF THE OFFER") THAT NUMBER OF SHARES REPRESENTING AT LEAST
66 2/3% OF ALL OUTSTANDING SHARES ON A FULLY DILUTED BASIS WHEN AGGREGATED WITH
THE SHARES OWNED BY PARENT, WHICH CURRENTLY OWNS APPROXIMATELY 47% OF THE
OUTSTANDING SHARES ON A FULLY DILUTED BASIS (THE "MINIMUM CONDITION"), AND (II)
THE EXPIRATION OR TERMINATION OF ALL APPLICABLE WAITING PERIODS UNDER THE
HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED (THE "HSR
ACT"). THE OFFER IS ALSO SUBJECT
 
                                        1
<PAGE>   4
 
TO OTHER TERMS AND CONDITIONS. SEE "THE TENDER OFFER -- CERTAIN CONDITIONS OF
THE OFFER."
 
     The Offer is being made pursuant to the Agreement and Plan of Merger dated
as of March 15, 1999 (the "Merger Agreement"), among Parent, Treadco Acquisition
Corporation, a Delaware corporation and wholly-owned subsidiary of Parent
("Newco"), and the Company pursuant to which, following the consummation of the
Offer and the satisfaction or waiver of certain conditions, Newco will be merged
with and into the Company, with the Company surviving the merger (as such, the
"Surviving Corporation") as a wholly-owned subsidiary of Parent (the "Merger"
and together with the Offer, the "Transaction"). A copy of the Merger Agreement
is attached hereto as ANNEX B.
 
     In the Merger, each outstanding Share (other than Shares owned by (i)
Parent, Newco, the Company, or any direct or indirect subsidiary of Parent or
(ii) stockholders of the Company, if any, who are entitled to and who properly
exercise dissenters' rights under Delaware law) will be converted into the right
to receive the per Share price paid in the Offer in cash, without interest (the
"Merger Consideration"). The Merger is subject to a number of conditions,
including approval by stockholders of the Company. Under the Company's
certificate of incorporation and Delaware law, the approval of the affirmative
vote of the holders of the Shares representing 66 2/3% of the outstanding Shares
is required to approve and adopt the Merger Agreement and the Merger. See
"SPECIAL FACTORS -- The Merger Agreement."
 
     As of March 10, 1999, there were 5,072,255 shares issued and outstanding
and 290,000 shares reserved for issuance upon the exercise of outstanding stock
options. Parent currently owns 2,497,200 shares (the "Parent Shares").
Accordingly, Parent believes that the Minimum Condition will be satisfied if
approximately 1,077,637 shares are validly tendered and not withdrawn prior to
the Expiration Date. If the Minimum Condition is satisfied and Parent accepts
for payment Shares tendered pursuant to the Offer, Parent will be able to effect
the Merger without the affirmative vote of any other stockholder of the Company.
 
     Immediately prior to the delivery of the Proposal by Parent to the Company,
Shapiro Capital Management Company, Inc. ("Shapiro Capital") entered into an
agreement with Parent (the "Support Agreement"), which, among other things,
granted Parent a proxy to vote 1,132,775 shares (approximately 21% of the
outstanding Shares on a fully diluted basis) beneficially owned by Shapiro
Capital for the approval of the Merger and against any corporate action the
consummation of which would violate, frustrate the purpose of, or prevent or
delay the Merger (the "Shapiro Proxy"). In the Support Agreement, Shapiro
Capital reserves the right to tender all Shares owned by it pursuant to the
Offer. Based on the number of Shares subject to the Shapiro Proxy when
aggregated with the Parent Shares, Parent currently has the voting power to
effect the Merger without the affirmative vote of any other stockholder of the
Company. See "SPECIAL FACTORS -- Background of the Offer and the Merger" for a
further description of the Support Agreement.
 
     In connection with the execution of the Merger Agreement, the Company
amended the Rights Agreement, dated as of September 1, 1991 between the Company
and NCNB Texas National Bank (as amended, the "Rights Agreement") governing the
Rights to purchase shares of Common Stock at $60.00 per share issued under the
Company's Rights Agreement, to provide that the Offer would not constitute an
event resulting in a "Distribution Date" (as such term is defined in the Rights
Agreement). The Rights Agreement prior to this amendment generally provided that
the Rights would not be applicable to any acquisition of the Company by Parent
or an affiliate thereof.
 
     Certain federal income tax consequences of the sale of Shares pursuant to
the Offer and the exchange of Shares for the Merger Consideration pursuant to
the Merger are described in "SPECIAL FACTORS -- Certain Federal Income Tax
Considerations."
 
     THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION AND SHOULD BE READ IN THEIR ENTIRETY BEFORE ANY DECISION
IS MADE WITH RESPECT TO THE OFFER OR THE MERGER.
 
                                        2
<PAGE>   5
 
                                SPECIAL FACTORS
 
BACKGROUND OF THE OFFER AND THE MERGER
 
     The Company was formed in June 1991 under Delaware Law as a wholly-owned
subsidiary of Parent as the successor to the truck tire retreading and new tire
sales business previously developed and conducted by another wholly-owned
subsidiary of Parent. In September 1991, the Company sold 2.5 million Shares and
Parent sold 179,300 Shares in an underwritten public offering at an initial
public offering price of $16.00 per Share. The offering was underwritten in part
by Morgan Stanley & Co. Incorporated ("Morgan Stanley"), which is acting as
financial advisor to Parent in connection with the Transaction. The Company
realized $37.2 million and Parent realized $2.7 million in connection with the
sale, after the payment of the underwriters' discount. The Company proceeds were
used to repay indebtedness under the Company's credit facility and indebtedness
owed to Parent, and Parent used its proceeds for general corporate purposes. The
initial public offering of the Company reduced Parent's ownership of the Company
to approximately 46%.
 
     In the first quarter of 1998, Parent began an evaluation of its then 46%
investment in the Company. The evaluation process focused on, among other
things, the performance of the Company, the costs incurred by the Company with
respect to its status as a public company, lower interest rates available to
Parent under its credit agreement, lower state income tax costs and other tax
benefits available to Parent if the Company were a wholly-owned subsidiary.
Parent also reviewed the Company's operating ratios for periods from 1990 to
1994, which were significantly better than 1995 and subsequent years. This
evaluation resulted in a presentation by Parent's management to Parent's Board
of Directors in May 1998 regarding the Company. The presentation included a
return on investment analysis assuming the Company achieved its own forecasts
and an analysis of Parent's after tax proceeds in the event that the Company
never achieved an acceptable return and Parent decided to dispose of its
investment in the Company. This analysis reflected the tax benefits of selling
assets of the Company rather than stock. The direct tax benefits to Parent of a
sale of assets totaled approximately $10 million.
 
     In July 1998, Parent's management made another presentation to Parent's
Board of Directors which was basically the same as the April 1998 presentation
except that the transaction costs of purchasing the remaining outstanding shares
of the Company were increased. Parent's Board of Directors discussed the
possibility of obtaining an option to purchase the shares of the Company's
second largest beneficial stockholder, Shapiro Capital, an investment management
firm that beneficially owns approximately 21% of the outstanding Shares on a
fully diluted basis.
 
     In August 1998, Samuel R. Shapiro, President of Shapiro Capital, advised
John R. Meyers, President of the Company, of his possible interest in disposing
of the Shares beneficially owned by Shapiro Capital. Mr. Meyers informed Robert
A. Young, President and CEO of Parent and Chairman of the Board of the Company
of such discussions with Mr. Shapiro.
 
     On September 11, 1998, Parent purchased a block of 177,500 shares for
$6.375 per Share in a private block transaction through Stephens. Parent used
working capital on hand to purchase such Shares. This purchase represents
Parent's sole acquisition of Shares since the Company's initial public offering.
Parent filed a Schedule 13D under the Exchange Act with the Commission
reflecting this purchase of Shares on September 18, 1998. As a result of this
purchase, Parent owned in the aggregate approximately 49% of the total
outstanding Shares.
 
     In November 1998, Morgan Stanley began assisting Parent in its analysis of
the Company. Representatives of Morgan Stanley made a presentation regarding the
Company to Parent's Board of Directors at its regular meeting on December 10,
1998. Morgan Stanley reviewed with the Board of Directors the Company's
financial results, status of the transition of the Company, liquidity of the
stock, research coverage, and possible strategic value.
 
     Morgan Stanley reviewed the following strategic alternatives with Parent's
Board of Directors (i) Parent continuing to hold its 49% interest in the
Company, (ii) sale of 100% of the Company or (iii) a Parent repurchase of the
remaining Company interest held by the public. Morgan Stanley was not requested
to, and
 
                                        3
<PAGE>   6
 
did not, render a financial opinion regarding the fairness of the consideration
in the Offer and the Merger. In addition, Morgan Stanley was not requested to,
and did not, solicit third party indications of interest with respect to
Parent's interest in the Company. See "THE TENDER OFFER -- Fees and Expenses"
for a description of Parent's fee arrangements with Morgan Stanley in connection
with the Offer and the Merger.
 
     Additionally, at this meeting, representatives of the Company made a
presentation regarding the Company's 1999 budget and its five-year business plan
(the "Management Projections"). This presentation had also been given to the
Board of Directors of the Company the previous day. See "Certain Projections."
 
     After discussion of the alternatives, Parent's Board of Directors concluded
that it would be appropriate for Mr. Young to meet with Mr. Shapiro to determine
if Shapiro Capital remained interested in selling its Shares.
 
     On December 18, 1998, the Company announced that it had entered into a
settlement of a dispute with Bandag, Incorporated and certain of Bandag's
current and former employees arising out of the two companies' former franchise
relationship. Under the settlement terms, the Company received a one-time cash
payment of approximately $9.995 million and reported additional after-tax income
of approximately $5.4 million, which represented $1.06 per Share on an after-tax
basis. The settlement payment was applied to reduce the Company's outstanding
borrowings under its revolving credit agreement.
 
     At the direction of Parent's Board of Directors, on January 6, 1999, Mr.
Young met with Mr. Shapiro at the principal offices of Shapiro Capital. At such
meeting, Mr. Young and Mr. Shapiro proposed various prices and after
negotiations, Messrs. Young and Shapiro tentatively agreed to a $9.00 per Share
price for the Shares beneficially owned by Shapiro Capital (the "Shapiro
Shares"). Subsequently, during the week of January 11, 1999, counsel for Parent
and Shapiro Capital exchanged drafts of an agreement for the purchase of the
Shapiro Shares. However, Parent and Shapiro Capital determined that in light of
the large number of investment management accounts holding the Shapiro Shares, a
direct purchase would be impractical.
 
     Immediately prior to the delivery of the Proposal by Parent to the Company
described below, Parent and Shapiro Capital did however enter into the Support
Agreement on January 22, 1999, pursuant to which, among other things, Shapiro
Capital granted the Shapiro Proxy to Parent to vote the Shapiro Shares
(1,132,775 shares (approximately 21% of the outstanding Shares on a fully
diluted basis)) for the approval of the Merger and against any corporate action
the consummation of which would violate, frustrate the purpose of, or prevent or
delay the Merger. The Shapiro Proxy will terminate upon the earlier of (i) July
31, 1999 or (ii) the consummation of the Merger. In addition, the Support
Agreement states that Shapiro Capital believes the $9.00 per share cash price is
fair, that Shapiro Capital will support the Transaction and that Shapiro Capital
reserves the right to tender any and all Shares beneficially owned by it
pursuant to the Offer. Parent filed an amendment to the Schedule 13D referred to
above reporting the Support Agreement on January 26, 1999 (as amended, the
"Schedule 13D"). The Schedule 13D and the Support Agreement, which is attached
as an exhibit to the Schedule 13D, are available for inspection and copies are
obtainable in the manner set forth in "THE TENDER OFFER -- Available
Information."
 
     On January 22, 1999, Parent delivered to the Board the Proposal, in which
Parent offered to enter into a merger agreement with the Company pursuant to
which all of the issued and outstanding Shares not owned by Parent would be
acquired for cash in an amount equal to $9.00 per Share. The Proposal is
attached as an exhibit to the Schedule 13D and is available for inspection and
copies are obtainable in the manner set forth in "THE TENDER OFFER -- Available
Information."
 
     Representatives of Parent advised the Company's independent directors that
a special committee should be formed to evaluate the Proposal and that such
committee would need independent advisors. On January 25, 1999, the independent
directors of the Board interviewed representatives of Stephens, an independent
investment banking firm located in Little Rock, Arkansas and recommended by
representatives of Parent as knowledgeable about the Company. On January 26,
1999, the Board met and formally appointed Robert B. Gilbert and Nicholas M.
Georgitsis as the members of the Special Committee to, among other things,
consider how the Company should respond to the Proposal. On January 28, 1999,
the Special Committee retained Kutak Rock as independent legal advisor to the
Special Committee, and on January 29, 1999, the
 
                                        4
<PAGE>   7
 
Special Committee retained Stephens as independent financial advisor to the
Special Committee. Since analysts for Stephens had written research reports
about the Company in the past, and Stephens had previously been a market maker
for the Shares, the Special Committee chose not to interview any other
investment bankers. During the first two weeks of February 1999, Stephens and
Kutak Rock conducted due diligence regarding the proposed transaction at the
offices of the Company.
 
     On February 2, 1999, counsel for Parent sent Kutak Rock a draft Merger
Agreement which provided for a self-tender by the Company to purchase for cash
the Shares not owned by Parent. On February 10, 1999, the Special Committee met
in person with its financial and legal advisors to consider the Proposal and the
terms and conditions of the draft of the Merger Agreement. At this meeting the
Special Committee and its financial and legal advisors discussed their comments
regarding the proposed structure, particularly the Company tender offer, the
results of due diligence and the appropriateness of the Offer Price. On February
12, 1999, representatives of Parent, including its financial and legal advisors,
met by telephone conference with the Special Committee's financial and legal
advisors. During such meeting the parties discussed the structure of the
Transaction and the Offer Price. Specifically, the advisors of the Special
Committee requested that the Transaction be structured as a tender offer by
Parent or a one-step merger transaction instead of a tender offer by the
Company, which utilized the credit facility and working capital of the Company
to finance the Offer and asked if Parent had offered its best price for the
Shares. Parent agreed to consider the Special Committee's concerns regarding the
requirements that the Company initiate a tender offer for the Shares but advised
the Special Committee that the $9.00 Offer Price was its best and highest price.
Parent, however, agreed to review with Stephens certain information on which its
analysis would be based.
 
     On February 16, 1999, the Special Committee met telephonically with its
legal and financial advisors. The advisors reported to the Special Committee the
results of the February 12, 1999 conference call with the Parent and its
advisors. Stephens advised the Special Committee of the results of its initial
analyses of the fairness of the Offer Price. Such initial analyses indicated
that, while the Offer Price may be fair, a better Offer Price might be
obtainable if Stephens specifically requested Parent to consider a $10.00 Offer
Price and offer its analyses and other justification in support thereof. The
Special Committee instructed Stephens to suggest to Parent an offer price of
$10.00 and to provide Parent with analyses supportive of this price. It also
instructed Kutak Rock to reiterate its concerns regarding the Merger Agreement,
including terms requiring the Company to initiate a self-tender and those
specifying certain conditions under which Parent would be entitled to a break-up
fee.
 
     On February 18, 1999, representatives of Parent, including its financial
and legal advisors, met by telephone conference with the Special Committee's
financial and legal advisors. During such meeting the parties again discussed
the structure of the Transaction and the Offer Price. Specifically, Stephens
outlined its due diligence and preliminary valuation methodology to date. After
various discussions among the parties, Stephens again suggested that Parent
raise the Offer Price, and suggested an Offer Price of $10.00 would be more
appropriate in light of its analysis. In response, David E. Loeffler, Vice
President and CFO of Parent, indicated that Parent was not willing to raise the
Offer Price. Mr. Loeffler did agree to review Stephens' preliminary analysis and
certain information on which its analysis was based. Legal counsel for the
Special Committee then reiterated the Special Committee's concerns over the
structure of the Transaction as a self-tender and requested that Parent be the
bidder in any tender offer for the Shares. Such counsel also expressed concern
over a proposed $1 million break-up fee payable to Parent by the Company under
certain conditions.
 
     On February 22, 1999, Stephens sent Parent a letter which set forth summary
financial information derived from the Management Projections, summary financial
information derived from financial projections for the Company prepared by
Stephens with input from the Company's management which assumed a lower revenue
growth rate and a lower operating margin (the "Revised Projections") than the
Management Projections and various valuation methodologies utilizing the Revised
Projections. In such letter, Stephens again asked Parent to consider raising the
Offer Price and suggested that $10.00 per Share would be more appropriate. Such
letter did not indicate, however, that an Offer Price of less than $10.00 per
Share would not be fair.
 
                                        5
<PAGE>   8
 
     On February 25, 1999, representatives of Parent met by telephone conference
with Stephens to discuss the Stephens letter of February 22, 1999. Mr. Loeffler
indicated that Parent believed that the $9.00 per Share Offer Price was fair and
that Parent was not willing to raise its offer. Mr. Loeffler also noted his
belief that the Management Projections were too aggressive for a fairness
analysis in light of the Company's past failures to meet its budget and
operating income for the first part of 1999 being substantially behind budget.
Mr. Loeffler then informed Stephens that Parent was willing to make some changes
to the structure of the Transaction in response to the concerns over the
structure of the Transaction.
 
     On February 26, 1999, representatives of Parent, including its legal
advisors, met by telephone conference with the Special Committee's financial and
legal advisors. During such meeting legal counsel for the Special Committee
advised Parent that, among other things, the Special Committee wanted Parent to
conduct the tender offer, the elimination or substantial reduction in the
triggers and amount of the break-up fee and certain other protections to insure
that the Offer and the Merger would close. The Special Committee also requested
that Parent modify the Merger Agreement to provide a sale premium recapture
("Recapture") such that if, within one year after the Merger is consummated,
Parent sells the Company, then it would pay pro ratably to all stockholders of
the Company as of the date of the Merger Agreement, any premium Parent would
otherwise receive in such sale. Premium in this instance would have been the
amount of any excess received by Parent over the value of the Company assuming
such value to be equivalent of a $9.00 price per Share for all outstanding
Shares. Representatives of Parent indicated their willingness to make certain of
the requested changes and reiterated that they believed the $9.00 Offer Price to
be fair and that Parent would not agree to the Recapture. Later that day,
counsel for Parent distributed a revised draft of the Merger Agreement to the
parties that provided, among other things, for Parent making the tender offer,
the use of funds solely from Parent to consummate the Offer and the Merger and
the reduction of the break-up fee from $1 million plus expenses of Parent to
$675,000 inclusive of expenses of Parent.
 
     On March 2, 1999, counsel to Parent met by telephone conference with
Stephens and Kutak Rock to discuss the revised draft of the Merger Agreement,
and on March 3, 1999, counsel for Parent distributed a revised draft of the
Merger Agreement reflecting certain changes discussed the prior day, including,
among other things, further limiting the type of events that would trigger the
break-up fee.
 
     On March 5, 1999 the Special Committee met telephonically with its
financial and legal advisors. Stephens advised the Special Committee that Parent
once again had declined to increase the Offer Price and had declined to include
the Recapture in the Merger Agreement. Stephens indicated that it would likely
be prepared to render an opinion on the fairness of a $9.00 offer price from a
financial point of view provided that it and the Special Committee receive
certain assurances from Parent that to its knowledge that there is no fact,
circumstance, occurrence or event not disclosed to Stephens in their preparation
of the Revised Projections that Parent believed would significantly impact the
Company's operating results for fiscal 1999. The Special Committee instructed
Stephens and Kutak Rock to request such assurances of Parent. The Special
Committee also instructed Kutak Rock to request that Parent in the Merger
Agreement represent that it knows of no current discussions or negotiations
involving the sale of the Company to a third party.
 
     On March 5, 1999, counsel to Parent met by telephone conference with
Stephens and Kutak Rock to discuss the revised draft of the Merger Agreement.
Counsel for the Special Committee indicated that the latest changes were
acceptable to the Special Committee and that the Special Committee was ready to
proceed with the Transaction as provided in the latest draft of the Merger
Agreement subject to certain changes to the Merger Agreement including the
foregoing representations of Parent regarding a lack of a third party proposal,
the Special Committee receiving an opinion from Stephens that the $9.00 Offer
Price was fair to the Disinterested Stockholders and that Stephens receive
certain information from Parent regarding the Management Projections and the
Revised Projections. Later that day, counsel for Parent distributed a draft of a
side letter containing certain assurances of Parent with respect to the
Management Projections and, as discussed above, the Revised Projections, which
was subsequently executed and delivered to Stephens by Parent on March 15, 1999.
 
     On March 9, 1999, the Special Committee and its legal and financial
advisors met telephonically. At this meeting, Stephens advised that the
assurances regarding the Revised Projections by Parent were acceptable,
 
                                        6
<PAGE>   9
 
and Kutak Rock advised that the Special Committee's final comments to the Merger
Agreement had been appropriately resolved.
 
     On March 15, 1999, the Special Committee unanimously determined to
recommend the proposed transaction to the Board of Directors of the Company
after Stephens expressed the opinion (subsequently confirmed in its written
opinion) that, on the basis of, and subject to the matters stated in its
opinion, the consideration to be received by the Disinterested Stockholders
pursuant to the Offer and the Merger is fair to the Disinterested Stockholders
from a financial point of view. Later that day, the Board, with all directors
participating by conference telephone, met to consider the Offer and the Merger.
The Special Committee, with representatives of Stephens and Kutak Rock
participating, reported to the Board on its review of the Offer, the Merger and
the Merger Agreement and its recommendation of the proposed transaction as fair
to the holders of Shares (other than Parent) (the "Public Stockholders"). After
receiving the recommendation of the Special Committee, asking questions of the
Special Committee as well as its financial and legal advisors and receiving a
further explanation of the provisions of the Offer and Merger Agreement from
representatives of Parent and its legal advisors, the Board unanimously approved
the Offer, the Merger and the Merger Agreement.
 
     Subsequently that day, the Board of Directors of Parent, at a special
meeting held by conference telephone to consider the matter, unanimously
approved the Offer, the Merger and the Merger Agreement. Representatives of
Parent and the Company completed execution of the Merger Agreement, and the
proposed Offer and the Merger were announced the next day.
 
RECOMMENDATION OF THE SPECIAL COMMITTEE AND THE BOARD OF DIRECTORS; FAIRNESS OF
THE OFFER AND THE MERGER
 
     The Special Committee has unanimously (a) determined that the Offer and the
Merger, taken together, are fair to the Public Stockholders, (b) recommended
that the Board approve the Offer and adopt the Merger Agreement and the
transactions contemplated thereby in accordance with the Delaware Corporation
Law, (c) resolved to recommend that Public Stockholders accept the Offer and
approve the Merger Agreement, and (d) recommended that the Board take action to
render the Rights inapplicable to the Offer and the Merger.
 
     In recommending approval of the Merger Agreement and the transactions
contemplated thereby, and recommending that the Public Stockholders tender their
Shares pursuant to the Offer, the Special Committee considered a number of
factors, including:
 
     (i) The results of operations, financial condition, assets, liabilities,
business strategy and prospects of the Company and the nature of the industry in
which the Company competes. The members of the Special Committee were generally
familiar with the Company's business, results of operations and prospects and
further reviewed the Company's business, conditions and prospects in the course
of various meetings referred to above.
 
     In evaluating the Company's prospects, the Special Committee with the
assistance of its financial advisor considered the substantial risks inherent in
the tire retreading and new tire businesses, including the increasingly
competitive environment in which the Company operates, and consolidations in the
industry leading to economies of scale. The Special Committee determined that
these factors indicated an industry trend favoring larger companies with
sustainable economies of scale. The Special Committee determined that these
economies were not available to the Company and, without significant additional
investment over time, these would not be available to the Company in the future.
The Special Committee also considered the recent losses of certain key marketing
and sales personnel, which losses were represented by management of the Company
to further undermine the Company's short-term competitive abilities.
 
     The Special Committee also considered certain projected financial data in
considering the Company's prospects. See "Certain Projections."
 
     (ii) The opinion of Stephens to the effect that, as of the date of such
opinion and based upon and subject to certain factors and assumptions stated
therein, the $9.00 per Share cash consideration to be received by the
Disinterested Stockholders pursuant to the Offer and the Merger is fair from a
financial point of view to such
 
                                        7
<PAGE>   10
 
stockholders. THE FULL TEXT OF STEPHENS' OPINION IS ATTACHED AS ANNEX A HERETO
AND IS INCORPORATED HEREIN BY REFERENCE. STOCKHOLDERS ARE URGED TO READ SUCH
OPINION IN ITS ENTIRETY.
 
     (iii) The historical trading prices of the Shares, the historical trading
volume and liquidity in the trading market for the Shares, and the relationship
of the $9.00 per Share Offer Price to the historical market prices for the
Common Stock, including the fact that the Offer Price represents a 33.3% premium
over the $6.75 per share closing price of the Company's Common Stock on December
23, 1998, the trading day thirty days prior to the public announcement of the
Proposal.
 
     (iv) The fact that Parent has advised the Company that it is not aware of
any current offer or indication of interest from any person regarding the sale
of the Company and that, since January 22, 1999, the date of the announcement of
Parent's Proposal, no person or entity has publicly communicated such an offer
or indication of interest in acquiring the Company, or a significant position in
the Shares.
 
     (v) The view of the Special Committee, after consultation with its
financial and legal advisors, that the terms of the Merger Agreement, including
the amounts payable to Parent in the event of termination, which amounts are
believed by the Special Committee to approximate Parent's expenses incurred in
the Transaction, would not materially deter bona fide acquisition proposals by
third parties.
 
     (vi) The fact that the Merger Agreement includes an obligation for Parent
to make a first-step cash tender offer thereby enabling the Public Stockholders
who tender their shares to receive cash consideration without waiting for the
Merger to be consummated. Also considered favorable was the fact that Public
Stockholders who do not tender their Shares pursuant to the Offer would receive
in the Merger the same cash price per share paid by Parent in the Offer (unless
they elect to exercise their statutory dissenters' rights).
 
     (vii) The availability of judicial appraisal rights under Section 262 of
the Delaware General Corporation Law ("DGCL") to stockholders of the Company who
dissent from the Merger.
 
     (viii) The fact that Shapiro Capital had indicated to Parent its
willingness to accept $9.00 for its Shares, and its granting to Parent of the
Shapiro Proxy to vote in favor of the Merger on its behalf.
 
     (ix) The fact that due to Parent's ownership position in the Company's
Common Stock, coupled with the proxy from Shapiro Capital, Parent possesses
sufficient votes to effect the Merger and to prevent any effort by a third party
to acquire control of the Company except with the consent of Parent.
 
     In light of the Company's return on equity over recent periods, the Special
Committee did not consider net book values or liquidation value to be
appropriate indicators of the value of the consideration to be received by the
Public Stockholders.
 
     In addition to the factors listed above, the Board and the Special
Committee had each considered the fact that consummation of the Offer and the
Merger would eliminate the opportunity of the Public Stockholders to participate
in any potential future growth in the value of the Company, but determined that
this loss of opportunity was reflected (i) in part by the price of $9.00 per
Share to be paid in the Offer and the Merger and (ii) was considered in the
premium and other analyses performed by Stephens.
 
     In reaching its decision to approve the Merger Agreement and recommending
acceptance of the Offer, the Special Committee relied on the factors identified
above. Because of the appointment of the Special Committee and its engagement of
Stephens and Kutak Rock, neither the Special Committee nor the Board considered
it necessary to retain additional representatives to act solely on behalf of the
Public Stockholders for purpose of negotiating the terms of the Transaction.
 
     The foregoing discussion of the information and factors considered by the
Special Committee is not meant to be exhaustive but includes the material
factors considered by the Special Committee in reaching its conclusions and
recommendations. In view of the variety of factors considered in its reaching a
determination, the Special Committee did not find it practicable to, and did
not, quantify or otherwise assign relative weights to the specific factors
considered in reaching its conclusions and recommendations. In addition,
individual members of the Special Committee may have given different weights to
different factors.
 
                                        8
<PAGE>   11
 
     The Board, by a unanimous vote of all directors, based in part on the
recommendation and approval of the Special Committee, approved the Merger
Agreement and the transactions contemplated thereby and determined that each of
the Offer and the Merger is fair to the Public Stockholders. The Board, by a
unanimous vote of all directors, has recommended that all holders of Shares
(other than Parent and certain affiliates) accept the Offer and tender their
Shares pursuant to the Offer.
 
     In reaching its determinations referred to above, the Board considered the
recommendation of the Special Committee and the factors set forth immediately
above, each of which, in view of the Board, supported such determinations.
 
     The Board, including the Special Committee, believes that the Offer and the
Merger are procedurally fair because, among other things:
 
     (i) the Special Committee consisted of independent directors appointed to
represent the interests of the Public Stockholders.
 
     (ii) the Special Committee retained Stephens as its independent financial
advisor to assist them in evaluating the Offer and the Merger.
 
     (iii) the Special Committee retained and was advised by independent legal
counsel.
 
     (iv) the deliberations pursuant to which the Special Committee evaluated
the Offer and the Merger and alternatives thereto.
 
     (v) the fact that Shapiro Capital had indicated to Parent its willingness
to accept $9.00 per Share through the execution of the Support Agreement, and
the fact that the terms and conditions of the Merger Agreement, including the
$9.00 per Share price, were actively negotiated between the Special Committee,
on the one hand, and Parent, on the other hand.
 
     The Board and the Special Committee recognized that the Merger is not
structured to require the approval of a majority of the stockholders of the
Company other than Parent, and that Parent through its Share ownership and the
Shapiro Proxy has sufficient voting power to approve the Merger without the
affirmative vote of any other stockholder of the Company. The Board and the
Special Committee recognized that Parent is required pursuant to the Merger
Agreement to vote its Shares in favor of the Merger.
 
     Parent advised the Special Committee and the Board that it has not
received, and the Company, the Board and Special Committee did not receive any
indications of interest or proposals regarding the acquisition of the Company
after the public announcement of the Proposal.
 
OPINION OF FINANCIAL ADVISOR
 
     Stephens was retained by the Special Committee to assist it in evaluating
the fairness, to the Disinterested Stockholders, from a financial point of view,
of the Offer Price and the Merger Consideration. At the meeting of the Company's
Board of Directors held on March 15, 1999, Stephens delivered to the Special
Committee a written opinion stating that each of the Offer Price and the Merger
Consideration is fair to the Disinterested Stockholders from a financial point
of view. In arriving at its written opinion, Stephens (i) reviewed certain
publicly available business and financial information relating to the Company;
(ii) reviewed certain information including internal financial statements,
financial projections (Management Projections and Revised Projections), and
other financial and operating data concerning the Company furnished to Stephens
by the Company and Parent; (iii) held discussions with certain senior officers,
directors and other representatives or advisors of the Company and Parent
concerning the business, operations and prospects of and potential strategic
alternatives available to the Company; (iv) reviewed the reported price and
trading activity for the Company's common stock; (v) analyzed certain financial
and stock market information for the Company as compared with similar
information for other publicly traded companies; (vi) reviewed the financial
terms, to the extent publicly available, of certain comparable business
combinations; (vii) reviewed the Merger Agreement, the exhibits thereto, and
other related documents; and (viii) performed certain discounted cash flow
analyses and other studies and analyses as it considered
 
                                        9
<PAGE>   12
 
appropriate. In addition, Stephens considered for the purposes of its opinion,
recent trends in the new tire and retreaded tire industry and the competitive
position of the Company.
 
     In arriving at its opinion, Stephens performed a variety of financial
analyses, the material portions of which are summarized below. This summary does
not purport to be a complete description of the analyses performed by Stephens.
In addition, Stephens believes that its analyses must be considered as a whole
and that selecting portions of its analysis or the factors considered by it,
without considering all such factors and analyses, could create a misleading
view of the process underlying its analyses. Stephens did not draw any specific
conclusions from or with regard to any one method of analysis in isolation from
others. Arriving at a fairness opinion is a complex process not necessarily
susceptible to partial or summary description. The matters considered by
Stephens in arriving at its opinion are based on numerous macroeconomic,
operating and financial assumptions with respect to industry performance,
general business and economic conditions and other matters, many of which are
beyond Parent's and the Company's control. The analyses performed by Stephens
are not necessarily indicative of actual values, which may be significantly more
or less favorable than suggested by such analyses. Additionally, analyses
relating to the values of businesses do not purport to be appraisals or to
reflect the prices at which such business actually may be sold. Because such
analyses are inherently subject to uncertainty, none of the Company, Parent or
Stephens or any other person assumes responsibility if future events do not
conform to the judgments reflected in the opinion of Stephens.
 
     In rendering its opinion, Stephens assumed and relied, without independent
verification, upon the accuracy and completeness of all financial and other
information publicly available or furnished to or otherwise reviewed by or
discussed with Stephens. With respect to financial forecasts and other
information provided to or otherwise reviewed by or discussed with Stephens, the
management of the Company advised Stephens that such forecasts and other
information were reasonably prepared on bases reflecting the best currently
available estimates and judgments of the management of the Company as to the
future financial performance of the Company. Stephens did not make or obtain an
independent evaluation or appraisal of the assets, liabilities (contingent or
otherwise and including the loss and loss adjustment expense reserves) or
reserves of the Company nor did Stephens make any physical inspection of the
properties or assets of the Company.
 
     The full text of the written opinion of Stephens dated March 15, 1999,
which sets forth the assumptions made, matters considered and limitations on the
review undertaken, is attached hereto as ANNEX A and is incorporated herein by
reference. Holders of Shares are urged to read the opinion carefully in its
entirety. Stephens' opinion is directed only to the fairness of the Offer Price
and the Merger Consideration to the Disinterested Stockholders from a financial
point of view. The summary of the opinion of Stephens set forth in this Offer to
Purchase is qualified in its entirety by reference to the full text of such
opinion.
 
     Overview. In its presentation to the Special Committee, Stephens presented
an overview of the Proposal, the Offer and the Merger and the negotiations
leading to the definitive Merger Agreement. Stephens reviewed the recent
historical performance of the Company as well as its future performance as
projected by the management of the Company.
 
     Stephens noted that at $9.00 per Share, the implied value of common equity,
including the value of stock options and performance award units plus the amount
of assumed debt less the amount of assumed cash and cash equivalents ("Implied
Total Transaction Value") of the entire Company was approximately $58.1 million.
This Implied Total Transaction Value represented approximately 0.3x the
Company's 1998 and estimated 1999 revenues included in the Revised Projections;
5.9x and 4.8x the Company's 1998 earnings, before interest, taxes, depreciation
and amortization ("EBITDA") (restated to exclude the effects of the Bandag
settlement and related litigation expenses) and estimated 1999 EBITDA included
in the Revised Projections, respectively; and 15.9x and 10.7x the Company's 1998
earnings, before interest, taxes and amortization ("EBITA") (restated to exclude
the effects of the Bandag settlement and related litigation expenses) and
estimated 1999 EBITA included in the Revised Projections, respectively. The
total implied value of common equity, including the value of stock options and
performance award units ("Implied Transaction Value") of the entire Company was
approximately $46.3 million. This Implied Transaction Value represented 47.3x
and 17.1x the Company's 1998 net income (restated to exclude the effects of the
Bandag
 
                                       10
<PAGE>   13
 
settlement and related litigation expenses) and estimated 1999 net income
included in the Revised Projections, respectively and approximately 0.7x the
Company's 1998 and estimated 1999 book value.
 
     Valuation Analysis. Stephens arrived at ranges of value for the Company's
Shares by utilizing four principal valuation methodologies: a comparable company
analysis; a comparable transaction analysis; a discounted cash flow analysis;
and an analysis of premiums paid in similar transactions. Stephens also analyzed
the historical trading (including price and volume) of the Company's Shares.
 
     Comparable Company Analysis. Stephens compared certain publicly available
financial information, operating data and projected financial performance
(research analyst estimates per I/B/E/S) of five companies that Stephens
believed to be appropriate for comparison, specifically, TBC Corporation
("TBC"); Bandag, Inc.; Standard Products Co.; Cooper Tire & Rubber Co.
("Cooper"); and Goodyear Tire & Rubber Co. ("Goodyear"), to corresponding
financial and operating data of the Company. Stephens derived ranges of implied
value for the Company's Shares by examining the comparable companies' trading
ratios of a) market value of common equity plus total debt less cash and cash
equivalents ("Total Market Capitalization") to 1998 EBITDA of 4.0x to 5.9x; b)
Total Market Capitalization to 1998 EBITA of 5.9x to 8.1x; c) market price of
common shares to reported 1998 earnings per share of 6.8x to 12.3x; and d) the
market price of common shares to estimated 1999 earnings per share (per research
analyst estimates from I/B/E/S) of 6.3x to 11.7x.
 
     Stephens derived a range of implied values for the Company's Shares of
$5.45 to $9.34 based on a ratio of Total Market Capitalization to 1998 EBITDA
(excluding the effects of the Bandag settlement and related litigation
expenses); a range of $2.02 to $4.19 based on a ratio of Total Market
Capitalization to 1998 EBITA (excluding the effects of the Bandag settlement and
related litigation expenses); a range of $1.93 to $3.08 based on a ratio of
market price of common shares to 1998 earnings per share (excluding the effects
of the Bandag settlement and related litigation expenses); and a range of $4.26
to $7.46 based on a ratio of market price of common shares to 1999 estimated
earnings per share included in the Revised Projections.
 
     Comparable Transaction Analysis. Stephens analyzed the financial terms, to
the extent publicly available, of three transactions involving businesses
comparable to that of the Company which were announced since May 5, 1996. The
selected transactions were Goodyear's acquisition of Brad Ragan, Inc.; Cooper's
acquisition of Avon Tyres PLC, and TBC's acquisition of Big O Tires. Stephens
derived ranges of implied value for the Company's shares by examining the
comparable transaction ratios of a) the price paid for the common equity plus
assumed debt less assumed cash ("Total Transaction Value") to latest twelve
month EBITDA which ranged from 6.2x to 14.1x; b) the Total Transaction Value to
latest twelve month EBITA which ranged from 9.2x to 20.1x; and c) the price paid
for the common equity ("Transaction Value") to latest twelve month net income
which ranged from 22.5x to 46.4x.
 
     Stephens derived a range of implied values for the Company's Shares of
$9.34 to $17.10 based on a ratio of Total Transaction Value to 1998 EBITDA
(excluding the effects of the Bandag settlement and related litigation
expenses); a range of $4.91 to $12.14 based on a ratio of Total Transaction
Value to 1998 EBITA (excluding the effects of the Bandag settlement and related
litigation expenses); and a range of $3.86 to $7.71 based on a ratio of
Transaction Value to 1998 net income (excluding the effects of the Bandag
settlement and related litigation expenses).
 
     Discounted Cash Flow Analysis. Stephens performed a discounted cash flow
analysis of the Company based upon the Revised Projections. Utilizing these
projections, Stephens calculated a range of implied value per share based upon
the discounted net present value of the sum of the projected stream of unlevered
free cash flows of the Company for the years ending December 31, 1999 through
2003 and a projected terminal value at 2003 less debt plus cash as of December
31, 1998 and divided by the number of the Company's fully diluted shares
outstanding. Stephens applied several discount rates (ranging from 11.0% to
13.0%) and multiples of EBITDA (ranging from 5.0x to 7.0x) to generate the
terminal value. Utilizing this methodology, the implied range of value per
Company Share was $7.39 to $12.28.
 
     Premiums Paid Analysis. Stephens compared the premiums over market prices
paid in 17 selected reported transactions from May 21, 1997 through December 17,
1998 in which a large or controlling stockholder bought out the remaining public
stockholders in a going private transaction. Stephens compared
 
                                       11
<PAGE>   14
 
the per share prices paid in such transactions with the closing price for the
target's stock thirty days and one day prior to announcement of the subject
transactions. The average premium paid in these transactions was 37.2% and 30.1%
over the subject target's closing per share price thirty days and one day prior
to announcement, respectively. This was compared to similarly calculated
premiums of 33.3% and 38.5% for the Shares thirty days and one day prior to the
January 22, 1999 announcement of the Proposal, respectively.
 
     Information Concerning Stephens. Stephens is a nationally recognized
investment banking firm and, as a customary part of its investment banking
activities, is regularly engaged in the valuation of businesses and their
securities in connection with mergers and acquisitions, negotiated
underwritings, private placements and for other purposes. The Special Committee
selected Stephens as a financial advisor because of its expertise, reputation
and familiarity with the Company. The Special Committee engaged Stephens to
render a fairness opinion in connection with the Transaction. The Company agreed
to pay Stephens a reasonable and customary fee upon the rendering of a fairness
opinion. The Company has agreed to reimburse Stephens for out-of-pocket expenses
(including fees and disbursements of their counsel) and to indemnify Stephens
and certain related persons against certain liabilities in connection with
rendering the fairness opinion and serving as the Special Committee's financial
advisor.
 
POSITION OF PARENT REGARDING FAIRNESS OF THE OFFER AND THE MERGER
 
     Parent believes that the consideration to be received by the Public
Stockholders pursuant to the Offer and the Merger is fair to the Public
Stockholders. Parent bases its belief on the following facts and conclusions:
 
     (i) the Company's Board and the Special Committee concluded that the Offer
and the Merger, taken together, are fair to and in the best interests of the
Public Stockholders;
 
     (ii) notwithstanding the fact that Stephens Opinion was addressed to the
Special Committee, and that Parent is not entitled to rely on such opinion, the
Special Committee received an opinion from Stephens that, as of the date of such
opinion and based on and subject to certain matters stated in such opinion, the
consideration to be received in the Offer and the Merger is fair to the
Disinterested Stockholders from a financial point of view;
 
     (iii) the support of the Transaction by Shapiro Capital, the largest
independent stockholder of the Company, which was the product of arms-length
negotiations;
 
     (iv) neither the Company nor Parent have received any indications of
interest from third parties regarding the acquisition of the Company since the
announcement of the Proposal;
 
     (v) the consideration stated in the Offer and the Merger for purchase of
the Shares not already owned by Parent represents a premium of 38.5% over the
closing price of the Shares on January 21, 1999, the day prior to announcement
of the Proposal, and a premium of approximately 33.3% over the closing price
thirty days prior to the announcement of the Proposal;
 
     (vi) although the current prices for the Shares reflect a decline in value
of the Company over historical market prices, such decline is attributable to
the deterioration in the Company's financial results and business prospects in
recent years as well as concerns about the Company's position within the truck
tire industry in general;
 
     (vii) the Shares provide only limited liquidity for the Company's
stockholders and that condition is not likely to change in light of the lack of
analyst coverage of the Company and limited trading volume of the Shares; and
 
     (viii) the other factors enumerated by the Special Committee as supporting
their recommendation of the Offer and the Merger.
 
     Parent found it not practicable to assign, and did not assign, relative
weights to the individual factors considered in reaching its conclusion as to
fairness. In light of the nature of the Company's business and the Transaction,
Parent did not consider net book value or liquidation value to be appropriate
indicators of the value of the consideration to be received by the Public
Stockholders.
 
                                       12
<PAGE>   15
 
CERTAIN PROJECTIONS
 
     In the course of the discussions between the parties, the Company provided
Parent and Stephens with the Management Projections and Stephens, with the input
of the management of the Company, prepared the Revised Projections as described
in "SPECIAL FACTORS -- Background of the Offer and the Merger" regarding the
Company. Stephens and the management of the Company discounted the Management
Projections since management of the Company and Stephens believed that they were
overly optimistic due to, among other things, increased competition within the
tire industry, the Company's actual performance during the past three years and
the first two months of 1999 and the Company's failure to meet its projections
in prior years. Accordingly, the Management Projections were not given
significant consideration by the Special Committee in reaching their conclusions
about the fairness of the Offer and the Merger to the Public Stockholders. In
addition, Stephens reviewed but did not rely on the Management Projections
except to provide an initial starting point for the formulation by Stephens with
input from the Company's management of the Revised Projections. However, the
Special Committee and Stephens did review and consider the Revised Projections
which are not publicly available and contain, among other things, the summary
financial information set forth below.
 
<TABLE>
<CAPTION>
                                                             YEAR ENDING DECEMBER 31,
                                                    ------------------------------------------
                                                     1999     2000     2001     2002     2003
                                                    ------   ------   ------   ------   ------
                                                       (IN MILLIONS EXCEPT PER SHARE DATA)
<S>                                                 <C>      <C>      <C>      <C>      <C>
Revenue...........................................  $191.9   $203.0   $214.7   $227.2   $240.4
Operating Income..................................     5.4      7.1      8.4     10.1     11.5
Net Income........................................     2.7      3.7      4.5      5.6      6.5
Earnings Per Share................................  $ 0.53   $ 0.73   $ 0.89   $ 1.10   $ 1.28
</TABLE>
 
     THE COMPANY (I) DOES NOT, AS A MATTER OF COURSE, MAKE PUBLIC FORECASTS AS
TO FUTURE REVENUES OR PROFITS AND (II) THE FOREGOING PROJECTIONS WERE BASED ON
ESTIMATES AND ASSUMPTIONS THAT ARE INHERENTLY SUBJECT TO SIGNIFICANT ECONOMIC
AND COMPETITIVE UNCERTAINTIES, ALL OF WHICH ARE DIFFICULT TO PREDICT AND MANY OF
WHICH ARE BEYOND THE COMPANY'S CONTROL. ACCORDINGLY, THERE CAN BE NO ASSURANCE
THAT THE PROJECTED RESULTS CAN BE REALIZED OR THAT ACTUAL RESULTS WILL NOT BE
MATERIALLY HIGHER OR LOWER THAN THOSE PROJECTED. THE PROJECTIONS WERE NOT
PREPARED WITH A VIEW TO PUBLIC DISCLOSURE OR COMPLIANCE WITH THE PUBLISHED
GUIDELINES OF THE COMMISSION OR THE GUIDELINES ESTABLISHED BY THE AMERICAN
INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS REGARDING PROJECTIONS OR FORECASTS.
NONE OF THE COMPANY OR PARENT OR THEIR RESPECTIVE ADVISORS ASSUMES ANY
RESPONSIBILITY FOR THE ACCURACY OF THE PROJECTIONS. THE INCLUSION OF THE
FOREGOING PROJECTIONS SHOULD NOT BE REGARDED AS AN INDICATION THAT THE COMPANY
OR PARENT OR ANY OTHER PERSON WHO RECEIVED SUCH INFORMATION CONSIDERS IT AN
ACCURATE PREDICTION OF FUTURE EVENTS. NEITHER THE COMPANY NOR PARENT INTENDS TO
UPDATE, REVISE OR CORRECT SUCH PROJECTIONS IF THEY BECOME INACCURATE (EVEN IN
THE SHORT TERM). A NUMBER OF FACTORS COULD CAUSE ACTUAL RESULTS TO DIFFER
MATERIALLY FROM THE FOREGOING PROJECTIONS, INCLUDING GENERAL ECONOMIC
CONDITIONS; COMPETITIVE INITIATIVES AND PRICING PRESSURES; AVAILABILITY AND COST
OF CAPITAL; SHIFTS IN MARKET DEMAND; WEATHER CONDITIONS; GOVERNMENT REGULATIONS;
THE PERFORMANCE AND NEEDS OF INDUSTRIES SERVED BY THE COMPANY; ACTUAL FUTURE
COSTS OF OPERATING EXPENSES SUCH AS THE PRICE OF OIL; SELF-INSURANCE CLAIMS AND
EMPLOYEE WAGES AND BENEFITS; AND THE TIMING AND AMOUNT OF CAPITAL EXPENDITURES.
 
                                       13
<PAGE>   16
 
PURPOSE AND STRUCTURE OF THE TRANSACTION
 
     The purpose of the Offer is for Parent to acquire the entire equity
interest in the Company. Following the Offer, Parent intends to acquire any
remaining equity interest in the Company through the consummation of the Merger.
 
     In order to provide a prompt and orderly transfer of sole ownership of the
Company to Parent and to expedite the time during which stockholders may receive
cash for their Shares, the Transaction has been structured as a cash tender
offer by Parent followed by a merger of Newco with and into the Company in
which, subject to the terms and conditions of the Merger Agreement, the
remaining equity interest in the Company (other than the Parent Shares) not
acquired pursuant to the Offer will be exchanged for the Merger Consideration.
See "Background of the Offer and the Merger" for a description of the
negotiations among the parties regarding the structure of the Transaction.
 
     The present requirement to maintain the listing of the Shares on the Nasdaq
National Market and registration of the Shares under the Exchange Act imposes on
the Company direct and indirect compliance costs that would be eliminated after
consummation of the Transaction. In addition, compliance with such ongoing
requirements impose an administrative burden on the Company, resulting in the
diversion of management time and resources.
 
     In addition, boards of directors of publicly-traded companies often have to
address conflicts of interest that inevitably arise as a result of the differing
interests and goals of majority and minority stockholders. Parent believes that
eliminating the potential for any conflict between the interests of Parent and
the other stockholders of the Company is a substantial benefit of the
Transaction.
 
PLANS FOR THE COMPANY AFTER THE OFFER AND THE MERGER
 
     It is expected that, immediately following the Merger, Parent will continue
its review of the Company and its assets, corporate structure, dividend policy,
capitalization, operations, properties, policies, management and personnel and
to consider, what, if any, changes would be desirable in light of the
circumstances then existing, and reserves the right to take such actions or
effect such changes as it deems desirable. Parent may retain advisors or
consultants to assist in such review. Any such changes could include changes in
the Company's business, corporate structure, capitalization, management or
dividend policy or a sale or recapitalization of the Company. See "Certain
Effects of the Offer and the Merger."
 
     Pursuant to the Merger Agreement, the directors of Newco along with John R.
Meyers, a current director and the President and Chief Executive Officer of the
Company, will be the directors of the Company upon consummation of the Merger,
and the officers of the Company will remain the officers of the Company, after
the Merger.
 
     Except as described herein, Parent has no current plans or proposals, and
since the Proposal has not engaged in any discussions with any third parties,
that would relate to, or result in, any extraordinary corporate transaction
involving the Company, such as a merger, reorganization or liquidation involving
the Company, a sale or transfer of a material amount of assets of the Company,
any change in the Company's capitalization or dividend policy or any other
material change in the Company's business, corporate structure or personnel.
However, Parent reserves the right to effect such actions or effect such changes
as its deems desirable.
 
CERTAIN EFFECTS OF THE OFFER AND THE MERGER
 
     If the Offer and the Merger are consummated, the Public Stockholders will
not have the opportunity to participate in the future earnings, profits, and
growth of the Company and will not have a right to vote on corporate matters.
Parent, as the parent company of the Company, will own a 100% interest in the
net book value and net earnings of the Company and will benefit from any
increase in the value of the Company following the Offer and the Merger. Any
such increase could be realized by Parent through a sale or recapitalization of
the Company. Similarly, Parent will bear the risk of any decrease in the value
of the Company after the Merger and the Public Stockholders will not face the
risk of a decline in the value of the Company after the Merger.
                                       14
<PAGE>   17
 
     The purchase of Shares pursuant to the Offer will reduce the number of
Shares that might otherwise trade publicly and will reduce the number of holders
of Shares, which could adversely affect the liquidity and market value of the
remaining Shares held by the stockholders of the Company other than Parent.
Parent cannot predict whether the reduction in the number of Shares that might
otherwise trade publicly would have an adverse or beneficial effect on the
market price for or marketability of the Shares or whether it would cause future
market prices to be greater or less than the Offer price.
 
     It is possible that the Offer could be consummated but the Merger fails to
occur if certain conditions to the Merger are not satisfied and not waived by
Parent. See "Merger Agreement -- Conditions to Merger." This outcome could have
certain adverse effects on any holders of Shares who do not tender their Shares
in the Offer, including adverse effects on the value, liquidity or trading
market of the Shares. These and certain other adverse effects are described more
fully in the remainder of this section.
 
     If the Offer closes but the Merger fails to occur, Parent could own a
number of Shares sufficient to give it voting control of the Company and enable
it to approve a merger, recapitalization, asset sale or other extraordinary
transaction involving the Company without the necessity of obtaining the
affirmative vote or approval of any other stockholders. The Merger Agreement
does not prohibit Parent or any third party from offering consideration of less
than $9.00 per share to the remaining holders of the Shares in any such
transaction. Parent, however, does not have any intention to consummate the
Offer without also subsequently consummating the Merger pursuant to the terms of
the Merger Agreement.
 
     Depending upon the number of Shares purchased pursuant to the Offer, the
Shares may no longer meet the requirements of the Nasdaq National Market for
continued listing and may, therefore, be delisted from such exchange. According
to the Nasdaq National Market's published guidelines, the Shares might no longer
be eligible for quotation on the Nasdaq National Market if, among other things,
either (i) the number of publicly-held Shares is less than 750,000, there are
fewer than 400 holders of at least 100 shares, the aggregate market value of the
publicly-held Shares is less than $5 million, net tangible assets are less than
$4 million and there are fewer than two registered and active market makers for
the Shares, or (ii) the number of publicly-held Shares is less than 1,100,000,
there are fewer than 400 holders of at least 100 shares, the aggregate market
value of publicly held Shares is less than $15 million, and either (x) the
Company's market capitalization is less than $50 million or (y) the total assets
and total revenue of the Company for the most recently completed fiscal year or
two of the last three most recently completed fiscal years does not exceed $50
million and there are fewer than four registered and active market makers. As of
March 10, 1999, there were 5,072,255 shares outstanding held of record by 171
holders (not including beneficial holders of Shares in street name).
 
     If the Shares were to cease to be quoted on the Nasdaq National Market, the
market for the Shares could be adversely affected. It is possible that the
Shares would be traded or quoted on other securities exchanges or in the
over-the-counter market, and that price quotations would be reported by such
exchanges or through the National Association of Securities Dealers Automated
Quotation System, Inc. ("Nasdaq").
 
     The extent of the public market for the Shares and availability of such
quotations would, however, depend upon such factors as the number of holders
and/or the aggregate market value of the publicly-held Shares at such time, the
interest in maintaining a market in the Shares on the part of securities firms,
the possible termination of registration of the Shares under the Exchange Act
and other factors.
 
     The Shares are currently "margin securities" under the regulations of the
Board of Governors of the Federal Reserve System (the "Federal Reserve Board"),
which has the effect, among other things, of allowing brokers to extend credit
on the collateral of such Shares. Depending upon factors similar to those
described above regarding listing and market quotations, the Shares might no
longer constitute "margin securities" for the purposes of the Federal Reserve
Board's margin regulations and, therefore, could no longer be used as collateral
for loans made by brokers.
 
     The Shares are currently registered under the Exchange Act. Such
registration may be terminated if the Shares are not listed on a national
securities exchange and there are less than 300 holders of record. Termination
of the registration of the Shares under the Exchange Act would substantially
reduce the
 
                                       15
<PAGE>   18
 
information required to be furnished by the Company to holders of Shares and to
the Commission and would make certain of the provisions of the Exchange Act,
such as the short-swing profit recovery provisions of Section 16(b), the
requirement of furnishing a proxy or information statement in connection with
stockholder action and the related requirement of an annual report to
stockholders and the requirements of Rule 13e-3 under the Exchange Act with
respect to "going private" transactions, no longer applicable to the Shares.
Furthermore, "affiliates" of the Company and persons holding "restricted
securities" of the Company may be deprived of the ability to dispose of such
securities pursuant to Rule 144 promulgated under the Securities Act of 1933, as
amended (the "Securities Act"). If registration of the Shares under the Exchange
Act were terminated, the Shares would no longer be "margin securities" or
eligible for listing on a securities exchange or Nasdaq reporting.
 
     Following consummation of the Merger, the Shares will be delisted from the
Nasdaq National Market, and the registration of the Shares under the Exchange
Act will be terminated. Accordingly, following the Merger, there will be no
publicly-traded securities of the Company outstanding, and the Company will no
longer be required to file reports with the Commission.
 
INTERESTS OF CERTAIN PERSONS IN THE OFFER AND THE MERGER
 
     In considering the recommendation of the Special Committee and the Board
with respect to the Offer and the Merger, stockholders should be aware that
certain members of the Company's management and the Board have certain interests
which are referred to below and which present them with actual or potential
conflicts of interest in connection with the Transaction.
 
     General. During the Company's previous three fiscal years, the Company has
engaged in certain transactions and entered into various agreements with Parent
and its subsidiaries, and Parent and its subsidiaries have had numerous contacts
with the Company. Certain employees working on behalf of the Company have
assisted Parent and Newco with respect to the Transaction. No employee working
on behalf of the Company has, or will, receive any additional or separate
compensation for such services.
 
     Service Fees and Other Related Party Transactions. The Company is a party
to a Transition Services Agreement with Parent whereby Parent provides services
in the areas of accounting, data processing, financial, legal, tax, cash
management, human resources, and risk management activities. The Transition
Services Agreement is effective indefinitely, unless terminated by either party
on 90 days' notice. The Agreement requires the Company to pay a service fee for
these services based on the value and cost of services provided. Certain other
expenses, primarily data processing and programming services, are charged to the
Company based on their actual cost to Parent. Total fees charged to the Company
under this agreement were as follows:
 
<TABLE>
<CAPTION>
                                                      1998         1997         1996
                                                   ----------   ----------   ----------
<S>                                                <C>          <C>          <C>
Service Fee......................................  $1,342,800   $1,400,021   $1,543,829
Data Processing Services.........................   1,361,646    1,225,298    1,018,213
                                                   ----------   ----------   ----------
          Total..................................  $2,704,446   $2,625,319   $2,562,042
                                                   ==========   ==========   ==========
</TABLE>
 
In November 1998, the Company purchased from Parent an office building for use
as the Company's headquarters. As consideration, the Company transferred its
present headquarters building to Parent along with a cash payment of $500,000.
In the opinion of management of the Company, the transaction values were fair to
the Company.
 
     Director and Officer Interlocks. Three of the six members of the Board are
currently members of the Parent's Board or are officers of Parent, and some of
the Company's executive officers are also officers of Parent. See ANNEXES C and
D for a listing of each of the directors and officers of Parent, Newco and the
Company. Pursuant to the Merger Agreement, the directors of Newco along with
John R. Meyers, a current director and the President and Chief Executive Officer
of the Company, will be the directors of the Company upon consummation of the
Merger, and the officers of the Company will remain the officers of the Company
after the Merger.
 
                                       16
<PAGE>   19
 
     Beneficial Ownership of Shares by Directors and Officers of Parent or
Newco. As of December 31, 1998, the following directors and executive officers
of Parent or Newco owned the following number of Shares and held stock options
to purchase Shares:
 
<TABLE>
<CAPTION>
                                                                                             TOTAL NUMBER
                                                                                           OF SHARES SUBJECT
                                                                           NUMBERS OF          TO STOCK
NAME                                                TITLE                SHARES OWNED(1)     OPTIONS HELD
- ----                                                -----                ---------------   -----------------
<S>                                    <C>                               <C>               <C>
Robert A. Young III..................  President, CEO & Director of
                                         Parent                              10,000             25,000
William A. Marquard..................  Chairman of Parent                    10,000             25,000
John H. Morris.......................  Director of Parent                        --             25,000
J. Lavon Morton......................  Vice President of Parent               1,000                 --
Jerry A. Yarbrough...................  Senior Vice President of Parent          800                 --
</TABLE>
 
- ---------------
 
(1) Exclusive of stock options to purchase Shares.
 
No other director or executive officer of Parent or Newco holds any Shares or
stock options to purchase Shares.
 
     Beneficial Ownership of Shares by Directors and Officers of the Company. In
addition to the foregoing information regarding Shares owned by directors and
officers of Parent or Newco (certain of whom are directors or officers of the
Company (see ANNEXES C and D)), as of December 31, 1998, the following directors
and officers of the Company owned the following number of Shares and held stock
options to purchase Shares:
 
<TABLE>
<CAPTION>
                                                                                             TOTAL NUMBER
                                                                                           OF SHARES SUBJECT
                                                                           NUMBERS OF          TO STOCK
NAME                                                TITLE                SHARES OWNED(1)     OPTIONS HELD
- ----                                                -----                ---------------   -----------------
<S>                                    <C>                               <C>               <C>
John R. Meyers.......................  President, CEO & Director              4,400             45,000
Nicolas M. Georgitsis(2).............  Director                               4,000             25,000
Robert B. Gilbert(2).................  Director                                  --             25,000
Daniel V. Evans......................  Executive Vice President & COO         2,279             40,000
</TABLE>
 
- ---------------
 
(1) Exclusive of stock options to purchase Shares.
 
(2) Member of the Special Committee.
 
The Company has been advised by the executive officers, directors and affiliates
of Parent and the Company (other than Parent) that such persons intend to tender
Shares owned by them pursuant to the Offer.
 
     Stock Options. With regard to the stock options to purchase Shares owned by
the directors and officers of the Company, Parent and Newco, all such stock
options as well as the rest of the outstanding stock options of the Company,
will immediately vest upon consummation of the Merger, and it is expected that
the optionees will receive a cash payment equal to the difference between the
$9.00 Offer Price and the exercise price for each stock option with respect to
each option that has an exercise price of less than $9.00 per Share. For each
stock option that has an exercise price of $9.00 per Share or more, the optionee
will receive a cash payment equal to $0.10 for each such stock option in return
for full release of claims under such options. The
 
                                       17
<PAGE>   20
 
directors and officers of Parent, Newco and the Company owning stock options are
expected to receive the following consideration in exchange for their stock
options:
 
<TABLE>
<CAPTION>
                                                                             TOTAL NUMBER
                                                                           OF SHARES SUBJECT
                                                                               TO STOCK          AGGREGATE
NAME                                                 TITLE                   OPTIONS HELD      CONSIDERATION
- ----                                                 -----                 -----------------   -------------
<S>                                    <C>                                 <C>                 <C>
Robert A. Young III..................  President, CEO & Director of
                                          Parent; Director of the Company       25,000            $11,375
William A. Marquard..................  Chairman of Parent; Director of
                                          the Company                           25,000            $13,250
John H. Morris.......................  Director of Parent; Director of
                                          the Company                           25,000            $13,250
John R. Meyers.......................  President, CEO & Director of the
                                          Company                               45,000            $82,500
Nicolas M. Georgitsis(1).............  Director of the Company                  25,000            $18,250
Robert B. Gilbert(1).................  Director of the Company                  25,000            $18,250
Daniel V. Evans......................  Executive Vice President & COO of
                                         the Company                            40,000            $51,500
</TABLE>
 
- ---------------
 
(1) Member of the Special Committee.
 
     Performance Unit Award Program. Pursuant to the Treadco, Inc. 1995
Performance Award Program (the "Performance Program"), certain employees of the
Company can be awarded Performance Award Units (the "Units") that have the
value, as of any given day, equal to the closing sale price of the Shares on the
most recent trading day. Only two employees of the Company hold Units, John R.
Meyers, President, CEO and Director of the Company and Daniel V. Evans,
Executive Vice President and COO of the Company. Pursuant to the terms of the
Performance Program all outstanding Units will vest upon consummation of the
Merger, and Messrs. Meyers and Evans will receive $9.00 in cash for each Unit
for aggregate consideration of $277,695 and $138,851, respectfully.
 
     Indemnification; Insurance. Pursuant to the Merger Agreement, Parent, Newco
and the Company have agreed to cooperate and use all reasonable efforts to
defend against and respond to any action, suit, proceeding, or investigation
relating to the Merger Agreement or to the transactions contemplated thereby
commenced by any third party. It is also agreed that all rights to
indemnification or exculpation now existing in favor of the directors, officers,
employees and agents of the Company as provided in the Company's certificate of
incorporation or bylaws shall, to the extent such rights are in accordance with
applicable law, survive the Merger and stay in effect in accordance with their
respective terms for a period of six years after the Effective Time.
 
     In addition, the Merger Agreement provides that Parent will cause the
Surviving Corporation, until the sixth anniversary of the Effective Time, to
maintain in effect policies of directors' and officers' liability insurance for
directors and officers of the Company on terms no less favorable than the
existing coverage maintained by the Company as of the date of the Merger
Agreement; provided, however, that Parent shall not be required in order to
maintain or procure such coverage to pay an annual premium in excess of 150% of
the current annual premium paid by the Company for its existing coverage (the
"Cap"); and provided, further, that if equivalent coverage cannot be obtained,
or can be obtained only by paying an annual premium in excess of the Cap, Parent
shall only be required to obtain as much coverage as can be obtained by paying
an annual premium equal to the Cap.
 
THE MERGER AGREEMENT
 
     The following is a summary of certain provisions of the Merger Agreement, a
copy of which is attached hereto as ANNEX B. The following summary is qualified
in its entirety by reference to the Merger Agreement.
 
                                       18
<PAGE>   21
 
     The Offer. The Merger Agreement provides for the making of the Offer by
Parent. The obligation of Parent to accept for payment and pay for Shares
tendered pursuant to the Offer is subject to the satisfaction of the Minimum
Condition, and certain other conditions that are described in "THE TENDER
OFFER -- Certain Conditions of the Offer." Parent has agreed that, without the
written consent of the Company (as recommended by the Special Committee), no
change in the Offer may be made which changes the form of consideration to be
paid or decreases the price per Share or the number of Shares sought in the
Offer, which waives or reduces, in whole or part, the Minimum Condition, which
imposes conditions to the Offer in addition to the Minimum Condition, and those
conditions described in "THE TENDER OFFER -- Certain Conditions of the Offer" or
which changes any other material term of the Offer in a manner adverse to the
stockholders of the Company (other than Parent).
 
     The Merger. The Merger Agreement provides that, following the purchase of
Shares pursuant to the Offer, the approval of the Merger Agreement by the
stockholders of the Company and the satisfaction or waiver of the other
conditions to the Merger, Newco will be merged with and into the Company. Under
the Company's certificate of incorporation and Delaware law, the approval of the
affirmative vote of the holders of the Shares representing 66 2/3% of the
outstanding Shares is required to approve and adopt the Merger Agreement and the
Merger. The Merger shall become effective at such time as a certificate of
merger or certificate of ownership and merger is filed with the Delaware
Secretary of State or at such later time as is specified in such certificate of
merger (the "Effective Time"). As a result of the Merger, all of the properties,
rights, privileges and franchises of the Company and Newco shall vest in the
Surviving Corporation, and all debts, liabilities and duties of the Company and
Newco shall become the debts, liabilities and duties of the Surviving
Corporation.
 
     At the Effective Time, (i) each issued and outstanding Share owned or held
by Parent or any direct or indirect subsidiary of Parent (other than the
Company) shall remain issued and outstanding and no payment shall be made with
respect thereto; (ii) each issued and outstanding Share owned or held by the
Company or any direct or indirect subsidiary of the Company shall be canceled
and no payment shall be made with respect thereto; (iii) each share of common
stock of Newco shall be canceled, and no payment shall be made with respect
thereto; and (iv) each Share outstanding immediately prior to the Effective Time
shall, except as otherwise provided in (i) or (ii) above and except for Shares
held by any holder who has not voted in favor of the Merger or consented thereto
in writing and who has demanded appraisal for such Shares in accordance with
Section 262 of the DGCL, be converted into the right to receive $9.00 in cash,
without interest, less any required withholding taxes.
 
     The Merger Agreement provides that the certificate of incorporation and
bylaws of the Company at the Effective Time will be the certificate of
incorporation of the Surviving Corporation. The Merger Agreement also provides
that the directors of Newco at the Effective Time plus John R. Meyers, a current
director and the President and Chief Executive Officer of the Company, will be
the directors of the Surviving Corporation and the officers of the Company at
the Effective Time will be the officers of the Surviving Corporation.
 
     Recommendation. The Merger Agreement states that (A) the Special Committee
has (i) determined as of March 15, 1999 that the Offer and the Merger, taken
together, are fair to the Company and its stockholders and in the best interests
of the holders of the Shares (other than Parent and certain affiliates) and (ii)
resolved as of March 15, 1999 to recommend acceptance of the Offer and approval
and adoption of the Merger Agreement and the Merger to the Board, and (B) that
the Board has (i) determined as of March 15, 1999 that the Offer and the Merger,
taken together, are fair to the Company and its stockholders and in the best
interests of the holders of the Shares (other than Parent and certain
affiliates) as well as fair to and in the best interests of the Company and its
stockholders (other than Parent and certain affiliates), (ii) resolved as of
March 15, 1999 to recommend acceptance of the Offer and approval and adoption of
the Merger Agreement and the Merger to the Company's stockholders (other than
Parent and certain affiliates).
 
     Rights Plan. Pursuant to the Rights Agreement, the Rights will not be
triggered by the Offer or the Merger. Pursuant to the Merger Agreement, the
Company amended the Rights Agreement to provide that the Offer would not
constitute an event resulting in a "Distribution Date" (as such term is defined
in the Rights Agreement).
 
                                       19
<PAGE>   22
 
     Stock Options; Performance Unit Awards. The Company has agreed to cooperate
with Parent to terminate the 1991 Stock Option Plan and the 1995 Performance
Award Program of the Company. Parent currently contemplates that (i) each
outstanding stock option with an exercise price less than $9.00 per Share to
purchase Shares, whether or not then exercisable, will be canceled immediately
prior to the consummation of the Merger in exchange for an amount in cash
payable at the time of such cancellation equal to the product of (x) the number
of Shares subject to such stock option and unexercised immediately prior to the
consummation of the Merger and (y) the excess of the Offer Price to be paid in
the Offer over the per share exercise price pursuant to such stock option, and
(ii) each outstanding stock option having an exercise price of $9.00 per Share
or more to purchase Shares, whether or not then exercisable, will be canceled
and exchanged for a cash payment of $0.10 for each such stock option for full
release of claims under such stock options. All outstanding Performance Award
Units will vest upon consummation of the Merger and the cash due to such holders
thereof will be paid upon the closing of the Merger. See "Interests of Certain
Persons in the Offer and the Merger."
 
     Interim Agreements of Parent, Newco and the Company. Pursuant to the Merger
Agreement, the Company has covenanted and agreed that, during the period from
the date of the Merger Agreement to the Effective Time, the Company will conduct
its operations according to its ordinary and usual course of business consistent
with past practice; that the Company will not intentionally take or willfully
omit to take any actions that results in or would result in a Company Material
Adverse Effect (as defined below); that the Company will use its reasonable best
efforts to preserve intact the business organization of the Company, to keep
available the services of its present officers and key employees and
consultants, and to maintain satisfactory relationships with customers, agents,
suppliers, and other persons having business relationships with the Company.
Pursuant to the Merger Agreement, without limiting the generality of the
foregoing, and except as otherwise expressly provided in the Merger Agreement,
the Company will not (a) issue, sell, or dispose of additional shares of capital
stock of any class (including the Shares) of the Company, or securities
convertible into or exchangeable for any such shares or securities, or any
rights, warrants, or options to acquire any such shares or securities, other
than Shares issued upon exercise of options disclosed pursuant to the Merger
Agreement, in each case in accordance with the terms so disclosed; (b) redeem,
purchase, or otherwise acquire, or propose to redeem, purchase, or otherwise
acquire, any of its outstanding capital stock, or other securities of the
Company; (c) split, combine, subdivide, or reclassify any of its capital stock
or declare, set aside, make, or pay any dividend or distribution on any shares
of its capital stock; (d) sell, pledge, dispose of, or encumber any of its
assets, except for sales, pledges, dispositions, or encumbrances in the ordinary
course of business consistent with past practices; (e) incur or modify any
indebtedness or issue or sell any debt securities, or assume, guarantee,
endorse, or otherwise as an accommodation become absolutely or contingently
responsible for obligations of any other person, or make any loans or advances,
other than in the ordinary course of business consistent with past practices;
(f) adopt or amend any bonus, profit sharing, compensation, severance,
termination, stock option, pension, retirement, deferred compensation,
employment or other employee benefit agreements, trusts, plans, funds, or other
arrangements for the benefit or welfare of any director, officer, or employee,
or (except for normal increases in the ordinary course of business that are
consistent with past practices and that, in the aggregate, do not result in a
material increase in benefits or compensation expense to the Company) increase
in any manner the compensation or fringe benefits of any director, officer, or
employee or pay any benefit not required by any existing plan or arrangement
(including, without limitation, the granting or vesting of stock options or
stock appreciation rights) or take any action or grant any benefit not expressly
required under the terms of any existing agreements, trusts, plans, funds, or
other such arrangements or enter into any contract, agreement, commitment, or
arrangement to do any of the foregoing or make or agree to make any payments to
any directors, officers, agents, contractors, or employees relating to a change
or potential change in control of the Company; (g) acquire by merger,
consolidation, or acquisition of stock or assets any corporation, partnership,
or other business organization or division or make any investment either by
purchase of stock or securities, contributions to capital, property transfer, or
purchase of any material amount of property or assets, in any other person; (h)
adopt any amendments to its certificate of incorporation or bylaws, except as
required by the Merger Agreement; (i) take any action other than in the ordinary
course of business and consistent with past practices, to pay, discharge,
settle, or satisfy any claim, liability, or obligation (absolute or contingent,
accrued or unaccrued, asserted or unasserted, or otherwise);
 
                                       20
<PAGE>   23
 
(j) change any method of accounting or accounting practice used by the Company,
except for any change required by reason of a concurrent change in generally
accepted accounting principles; (k) revalue in any respect any of its assets,
including, without limitation, writing down the value of its portfolio or
writing off notes or accounts receivable other than in the ordinary course of
business consistent with past practices; (l) authorize any unbudgeted capital
expenditure or expenditures that, individually, is in excess of $300,000 or, in
the aggregate, are in excess of $500,000; (m) make any tax election, settle or
compromise any federal, state, or local tax liability or consent to the
extension of time for the assessment or collection of any federal, state, or
local tax; (n) settle or compromise any pending or threatened suit, action, or
claim material to the Company or relevant to the transactions contemplated by
this Agreement; (o) enter into any agreement, arrangement, or understanding to
do any of the foregoing actions; (p) voluntarily take any action or willfully
omit to take any action that could make any representation or warranty of the
Company in the Merger Agreement untrue or incorrect in any material respect at
any time, including as of the date of the Merger Agreement and as of the time of
consummation of the Offer and the Effective Time, as if made as of such time.
 
     Parent has agreed not to take any action for the purpose of causing the
Company to violate any of the foregoing obligations and agreed to take all
action necessary to allow the Company to comply with its obligations under the
Merger Agreement.
 
     Pursuant to the Merger Agreement, Parent and Newco will each hold and will
each cause its consultants and advisors to hold in confidence, unless compelled
to disclose by judicial or administrative process or by other requirements of
law, all documents and information concerning the Company and its subsidiaries
furnished to Parent or Newco in connection with the transactions contemplated by
the Merger Agreement (except to the extent that such information can be shown to
have been (i) previously known by Parent or Newco from sources other than the
Company, or its directors, officers, representatives or affiliates, (ii) in the
public domain through no fault of Parent or Newco or (iii) later lawfully
acquired by Parent or Newco from other sources who are not known by Parent or
Newco to be bound by a confidentiality agreement or otherwise prohibited from
transmitting the information to Parent or Newco by a contractual, legal or
fiduciary obligation) and will not release or disclose such information to any
other person, except its auditors, attorneys, financial advisors and other
consultants and advisors in connection with the Merger Agreement and the
transactions contemplated thereby. Parent and Newco will each be deemed to have
satisfied its obligation to hold such information confidential if it exercises
the same care as it takes to preserve confidentiality for its own similar
information.
 
     In the Merger Agreement the Company, its affiliates and their respective
officers, directors, employees, representatives and agents have agreed that they
shall immediately cease any existing discussions or negotiations, if any, with
any parties conducted heretofore with respect to any acquisition of all or any
material portion of the assets of, or any equity interest in, the Company or any
business combination with the Company, subject to certain exceptions. The
Company may, directly or indirectly, furnish information and access, in each
case only in response to unsolicited requests therefor, to any corporation,
partnership, person or other entity or group pursuant to confidentiality
agreements, and may participate in discussions and negotiate with such entity or
group concerning any merger, sale of assets, sale of shares of capital stock or
similar transaction involving the Company, if such entity or group has submitted
a written proposal to the Special Committee or the Board relating to any such
transaction and the Special Committee or the Board by a majority vote determines
in its good faith judgment, after consultation with its financial and legal
advisors, that failing to take such action would constitute a breach of the
Special Committee's or the Board's fiduciary duty. The Special Committee or the
Board shall provide a copy of any such written proposal to Parent immediately
after receipt thereof and thereafter keep Parent promptly advised of any
development with respect thereto. Except as set forth above, neither the Company
nor any of its affiliates, nor any of its or their respective officers,
directors, employees, representatives or agents, shall, directly or indirectly,
encourage, solicit, participate in or initiate discussions or negotiations with,
or provide any information to, any corporation, partnership, person or other
entity or group (other than Parent and Newco, any affiliate of Parent and Newco
or any designees of Parent and Newco) concerning any merger, sale of assets,
sale of shares or capital stock or similar transaction involving the Company;
provided, however, that nothing in the Merger Agreement shall
 
                                       21
<PAGE>   24
 
prevent the Board from taking, and disclosing to the Company's stockholders, a
position contemplated by Rules 14d-9 and 14e-2 promulgated under the Exchange
Act with regard to any tender offer; provided, further, that the Board shall not
recommend that the stockholders of the Company tender their Shares in connection
with any such tender offer unless the Special Committee or the Board by a
majority vote determines in its good faith judgment, after consultation with its
financial and legal advisors, that failing to take such action would constitute
a breach of the Special Committee's or Board's fiduciary duty. Additionally,
Parent has agreed to notify the Company of any bona fide proposal received by
Parent regarding a Third Party Acquisition (as defined below) and if it obtains
any information that would make certain representations and warranties of the
Company untrue or inaccurate in any material respect.
 
     Between the date hereof and the Effective Time, the Company will give, upon
reasonable notice, Parent and Newco and their authorized representatives
reasonable access to all employees and properties and to all books and records
of the Company, and will cause the Company's officers to furnish Parent and
Newco with such financial and operating data and other information with respect
to the business and properties of the Company as Parent or Newco may from time
to time reasonably request.
 
     Pursuant to the Merger Agreement, the Company shall cause promptly after
completion of the Offer a meeting of its stockholders (the "Company Stockholder
Meeting") to be duly called and held for the purposes of voting on the approval
and adoption of the Merger Agreement and the Merger. The Merger Agreement
provides that the Company and Parent will cooperate and use all reasonable
efforts to prepare, and the Company and Parent will file with the Commission, as
soon as reasonably practical after completion of the offer, a proxy or
information statement relating to the Company Stockholder Meeting (the "Proxy
Statement"). The Company has agreed, subject to the fiduciary duties of the
Special Committee and the Board, to use all reasonable efforts to obtain the
necessary approvals by its stockholders of the Merger Agreement and the
transactions contemplated thereby. Parent has agreed to vote and to cause its
affiliates to vote all Shares owned by them or as to which a proxy or power of
attorney is held by them, including the Shapiro Proxy, in favor of adoption of
the Merger Agreement.
 
     Parent and Newco have each agreed that all rights to indemnification or
exculpation now existing in favor of the directors, officers, employees and
agents of the Company as provided in the Company's certificate of incorporation
or bylaws shall, to the extent such rights are in accordance with applicable
law, survive the Merger and stay in effect in accordance with their respective
terms for a period of six years after the Effective Time.
 
     The Merger Agreement also provides that Parent will cause the Surviving
Corporation, until the sixth anniversary of the Effective Time, to maintain in
effect policies of directors' and officers' liability insurance for directors
and officers of the Company on terms no less favorable than the existing
coverage maintained by the Company as of the date of the Merger Agreement;
provided, however, that Parent shall not be required in order to maintain or
procure such coverage to pay an annual premium in excess of 150% of the current
annual premium paid by the Company for its existing coverage (the "Cap"); and
provided, further, that if equivalent coverage cannot be obtained, or can be
obtained only by paying an annual premium in excess of the Cap, Parent shall
only be required to obtain as much coverage as can be obtained by paying an
annual premium equal to the Cap.
 
     The Merger Agreement provides that the Company, Newco and Parent will each
use all reasonable efforts to consummate the transactions contemplated by the
Merger Agreement.
 
     Representations and Warranties. The Merger Agreement contains various
customary representations and warranties of the parties thereto including,
without limitation, representations by the Company, Parent and Newco as to
organization, corporate power and authority to execute, deliver and consummate
the Merger Agreement, and necessary consents and approvals. In addition, the
Company has made representations and warranties concerning undisclosed
liabilities, certain changes or events concerning its businesses and the
accuracy of its financial statements and its filings under the Exchange Act and
the Securities Act. All of the Company's representations and warranties are
qualified to the extent of Parent's knowledge of a breach or inaccuracy of such
representations and warranties as of the date of the Merger Agreement. Parent
has made additional representations and warranties concerning the Company's
filings under the Exchange Act and
                                       22
<PAGE>   25
 
Securities Act, the availability of the funds necessary to consummate the Offer
and the Merger, and the Company's ability to comply with its obligations under
the Merger Agreement.
 
     Conditions to the Merger. The obligations of each of Parent, Newco and the
Company to effect the Merger are subject to the satisfaction of certain
conditions, including: (a) the Merger Agreement shall have been adopted by the
affirmative vote of the stockholders of the Company by the requisite vote in
accordance with the certificate of incorporation and bylaws of the Company and
with applicable law; (b) no statute, rule, regulation, executive order, decree,
ruling or injunction shall have been enacted, entered, promulgated or enforced
by any United States court or United States governmental authority which
prohibits, restrains, enjoins or restricts the consummation of the Merger or
which imposes any limitation on the ability of Parent to exercise rights of
ownership of the Shares owned by Parent that will result in a Parent Material
Adverse Effect (as defined in the Merger Agreement) provided that the parties
will use their respective reasonable best efforts to have any such injunction,
decree or order lifted; (c) any waiting period applicable to the Merger under
the HSR Act shall have terminated or expired and all required filings, consents,
approvals, permits and authorizations with or for governmental authorities have
been made or obtained; and (d) the Company shall have purchased Shares pursuant
to the Offer (except that Parent in its sole discretion may waive conditions to
the Offer).
 
     Termination. The Merger Agreement may be terminated: (a) by mutual written
consent of Parent, Newco and the Company (upon recommendation of the Special
Committee); (b) by Parent and Newco or the Company if any court of competent
jurisdiction in the United States or other United States governmental body shall
have issued a final order, decree or ruling or taken any other final action
restraining, enjoining or otherwise prohibiting the Merger and such order,
decree, ruling or other action shall have become final and nonappealable; (c) by
Parent and Newco if due to an occurrence or circumstances that would result in a
failure to satisfy any of the conditions set forth in "THE TENDER
OFFER -- Certain Conditions," Parent has (i) failed to commence the Offer within
five days following the initial public announcement of the Offer, (ii)
terminated the Offer or (iii) failed to pay for Shares pursuant to the Offer by
July 31, 1999; (d) by the Company if (i) there has not been a breach of any
material representation, warranty, covenant, or agreement on the part of the
Company, and Parent has (A) failed to commence the Offer within five business
days following the date of the initial public announcement of the Offer, (B)
terminated the Offer, (C) failed to pay for the Shares pursuant to the Offer by
July 31, 1999, or (ii) prior to the purchase of Shares pursuant to the Offer, a
person or group has made a bona fide offer that the Special Committee or the
Board by a majority vote determines in its good faith judgment and in the
exercise of its fiduciary duties, after consultation with its financial and
legal advisors, is more favorable to the stockholders of the Company than the
Offer and the Merger; (e) by Parent and Newco prior to the purchase of Shares
pursuant to the Offer if (i) there shall have been a breach (not cured or
curable within certain time limits) of any representation or warranty on the
part of the Company having a Company Material Adverse Effect or materially
adversely affecting (or materially delaying) the ability of Parent to consummate
the Offer and the Merger, (ii) there shall have been a breach (not cured or
curable within certain time limits) of any covenant or agreement on the part of
the Company resulting in a Company Material Adverse Effect or materially
adversely affecting (or materially delaying) the ability of Parent to consummate
the Offer and the Merger, (iii) the Special Committee shall engage in
negotiations with any entity or group (other than Parent or Newco) that has
proposed a Third Party Acquisition (as defined below) (with certain exceptions),
(iv) the Company enters into an agreement, letter of intent or arrangement with
respect to a Third Party Acquisition (as defined below), (v) the Special
Committee or the Board shall have withdrawn or modified in an adverse manner its
approval or recommendation of the Offer, the Merger Agreement or the Merger or
shall have recommended another offer, or shall have adopted any resolution to
effect any of the foregoing or (vi) the Minimum Condition shall not have been
satisfied by the expiration date of the Offer and on or prior to such date (A)
an entity or group (other than Parent or Newco) shall have made and not
withdrawn a proposal with respect to a Third Party Acquisition or (B) any person
or group (including the Company) other than Parent, its affiliates (other than
the Company) or Shapiro Capital has become the beneficial owner of 19.9% (except
in bona fide arbitrage transactions) or more of the Shares; or (f) by the
Company if (i) there shall have been a breach of any representation or warranty
on the part of Parent or Newco which materially adversely affects (or materially
delays) the consummation of the Offer or (ii) there shall have been a material
breach of any covenant or agreement on
                                       23
<PAGE>   26
 
the part of Parent or Newco and which materially adversely affects (or
materially delays) the consummation of the Offer or the Merger.
 
     Termination Fee. If (i) Parent and Newco terminate the Merger Agreement
pursuant to clause (e)(v) of the preceding paragraph; or (ii) the Company
terminates the Merger Agreement pursuant to clause (d)(ii) of the preceding
paragraph, then the Company shall pay to Parent and Newco, within one business
day following such termination, a fee, in cash, of $675,000 (inclusive of all
fees and expenses incurred by Parent, Newco and their affiliates (other than the
Company) in connection with the transactions contemplated by the Merger
Agreement) (the "Termination Fee").
 
     "Third Party Acquisition" means the occurrence of any of the following
events (i) the acquisition of the Company by merger or otherwise by any person
(which includes a "person" as such term is defined in Section 13(d)(3) of the
Exchange Act) or entity other than Parent, Newco or any affiliate thereof (other
than the Company) or Shapiro Capital (a "Third Party"); (ii) the acquisition by
Third Party of 19.9% or more of the assets of the Company; (iii) the acquisition
by Third Party of 19.9% or more of the outstanding Shares; (iv) the adoption by
the Company of a plan of liquidation or the declaration or payment of an
extraordinary dividend; or (v) the repurchase by the Company of 19.9% or more of
the outstanding Shares.
 
     Pursuant to the Merger Agreement, in the event of the termination and
abandonment of the Merger Agreement, the Merger Agreement will become void and
have no effect, without any liability on the part of any party or its directors,
officers or Stockholders, other than certain provisions of the Merger Agreement
relating to the termination fee, expenses of the parties and confidentiality of
information, provided, that a party will not be relieved from liability for any
breach of the Merger Agreement.
 
     Costs and Expenses. Except for the Termination Fee, if applicable, and as
discussed below, the Merger Agreement provides that all costs and expenses
incurred in connection with the transactions contemplated by the Merger
Agreement shall be paid by the party incurring such costs and expenses. Parent
has agreed to reimburse the Company for all expenses incurred with providing
Parent the Company's stockholder lists, security position listings and mailing
labels used in connection with the dissemination of the Offer to the holders of
Shares.
 
DISSENTERS' RIGHTS
 
     Holders of Shares do not have dissenters' rights as a result of the Offer.
However, if the Merger is consummated, holders of Shares will have certain
rights pursuant to the provisions of Section 262 of the DGCL to dissent and
demand appraisal of, and to receive payment in cash of the fair value of, their
Shares. If the statutory procedures were complied with, such rights could lead
to a judicial determination of the fair value required to be paid in cash to
such dissenting holders for their shares. Any such judicial determination of the
fair value of Shares could be based upon considerations other than or in
addition to the Offer Price or the market value of the Shares, including asset
values and the investment value of the Shares. The value so determined could be
more or less than the Offer Price or the Merger Consideration.
 
     If any stockholder of Shares who demands appraisal under Section 262 of the
DGCL fails to perfect, or effectively withdraws or loses his right to appraisal,
as provided in the DGCL, the Shares of such stockholder will be converted into
the Merger Consideration in accordance with the Merger Agreement. A stockholder
may withdraw his demand for appraisal by delivery to Parent of a written
withdrawal of his demand for appraisal and acceptance of the Merger.
 
     ANNEX E to this Offer to Purchase sets forth in full Section 262 of the
DGCL. The foregoing summary thereof is qualified in its entirety by reference
thereto.
 
     FAILURE TO FOLLOW THE STEPS REQUIRED BY SECTION 262 OF THE DGCL FOR
PERFECTING APPRAISAL RIGHTS MAY RESULT IN THE LOSS OF SUCH RIGHTS. SEE ANNEX E.
 
                                       24
<PAGE>   27
 
CERTAIN FEDERAL INCOME TAX CONSIDERATIONS
 
     Sales of Shares pursuant to the Offer (and the receipt of the right to
receive cash by stockholders of the Company pursuant to the Merger) will be
taxable transactions for Federal income tax purposes under the Internal Revenue
Code of 1986, as amended (the "Code"), and may also be taxable transactions
under applicable state, local, foreign and other tax laws. For Federal income
tax purposes, a tendering stockholder will generally recognize gain or loss
equal to the difference between the amount of cash received by the stockholder
pursuant to the Offer (or to be received pursuant to the Merger) and the
aggregate tax basis in the Shares tendered by the stockholder and purchased
pursuant to the Offer (or canceled pursuant to the Merger). Gain or loss will be
calculated separately for each block of Shares tendered and purchased pursuant
to the Offer (or canceled pursuant to the Merger).
 
     If tendered Shares are held by a tendering stockholder as capital assets,
gain or loss recognized by the tendering stockholder will be capital gain or
loss, which will be long-term capital gain or loss if the tendering
stockholder's holding period for the Shares exceeds one year. Under present law,
long-term capital gains recognized by a tendering individual stockholder will
generally be taxed at a maximum Federal marginal tax rate of 20%.
 
     A stockholder (other than certain exempt stockholders including, among
others, all corporations and certain foreign individuals) that tenders Shares
may be subject to 31% backup withholding unless the stockholder provides its Tax
Identification Number ("TIN") and certifies that such number is correct or
properly certifies that it is awaiting a TIN. A stockholder that does not
furnish its TIN may be subject to a penalty imposed by the IRS. Each stockholder
should complete and sign the Substitute From W-9 included as part of the Letter
of Transmittal so as to provide the information and certification necessary to
avoid backup withholding.
 
     If backup withholding applies to a stockholder, the Depositary is required
to withhold 31% from payments to such stockholder. Backup withholding is not an
additional tax. Rather, the amount of the backup withholding can be credited
against the Federal income tax liability of the person subject to the backup
withholding, provided that the required information is given to the IRS. If
backup withholding results in an overpayment of tax, a refund can be obtained by
the stockholder upon filing an income tax return.
 
     THE FOREGOING DISCUSSION MAY NOT BE APPLICABLE WITH RESPECT TO SHARES
RECEIVED PURSUANT TO THE EXERCISE OF EMPLOYEE STOCK OPTIONS OR OTHERWISE AS
COMPENSATION OR WITH RESPECT TO HOLDERS OF SHARES WHO ARE SUBJECT TO SPECIAL TAX
TREATMENT UNDER THE CODE, SUCH AS NON-U.S. PERSONS, LIFE INSURANCE COMPANIES,
TAX-EXEMPT ORGANIZATIONS AND FINANCIAL INSTITUTIONS, AND MAY NOT APPLY TO A
HOLDER OF SHARES IN LIGHT OF ITS INDIVIDUAL CIRCUMSTANCES. STOCKHOLDERS ARE
URGED TO CONSULT THEIR OWN TAX ADVISORS TO DETERMINE THE PARTICULAR TAX
CONSEQUENCES TO THEM (INCLUDING THE APPLICATION AND EFFECT OF ANY STATE, LOCAL
OR FOREIGN INCOME AND OTHER TAX LAWS) OF THE OFFER AND THE MERGER.
 
                                THE TENDER OFFER
 
TERMS OF THE OFFER
 
     Upon the terms and subject to the conditions of the Offer, Parent will
accept for payment and pay for all Shares validly tendered prior to the
Expiration Date and not theretofore withdrawn in accordance with the procedures
set forth below under "Withdrawal Rights." The term "Expiration Date" means
12:00 Midnight, New York City time, on Tuesday, April 20, 1999, unless and until
Parent shall have extended the period of time during which the Offer is open, as
extended, in which event the term "Expiration Date" shall mean the latest time
and date at which the Offer, as so extended by Parent, shall expire.
 
     The Offer is subject to certain conditions set forth in "Certain Conditions
of the Offer," including satisfaction of the Minimum Condition and the
expiration or termination of the waiting period applicable to
                                       25
<PAGE>   28
 
the Transaction under the HSR Act. If any such condition is not satisfied,
Parent may (1) terminate the Offer and return all tendered Shares to tendering
stockholders, (2) extend the Offer and, subject to withdrawal rights as set
forth below in "Withdrawal Rights," retain all such Shares until the expiration
of the Offer as so extended, (3) waive such condition and, subject to any
requirements to extend the period of time during which the Offer is open,
purchase all Shares validly tendered by the Expiration Date and not withdrawn or
(4) delay acceptance for payment of or payment for Shares, subject to applicable
law, until satisfaction or waiver of the conditions to the Offer; provided,
however, that unless previously approved by the Company (as recommended by the
Special Committee) in writing, no change may be made which decreases the price
per Share payable in the Offer, which changes the form of consideration to be
paid in the Offer, which reduces the maximum number of Shares to be purchased in
the Offer, which waives or reduces, in whole or part, the Minimum Condition,
which imposes conditions to the Offer in addition to those set forth in "Certain
Conditions of the Offer" or which broadens the scope of such conditions or which
changes any other material term of the Offer in a manner adverse to the
stockholders of the Company (other than Parent). In the Merger Agreement, Parent
has agreed, subject to the conditions contained in "Certain Conditions of the
Offer" and its rights under the Offer, to accept for payment Shares as soon as
practicable after the latest of (1) the date on which the waiting period under
the HSR Act has expired or been terminated, (2) the date on which the conditions
set forth in "Certain Conditions of the Offer" are fulfilled and there is no
right to terminate the Offer (subject to Parent's right to extend the Offer)
pursuant to the provisions contained in "Certain Conditions of the Offer" and
(3) the earliest date on which the Offer can expire under federal law. For a
description of Parent's right to extend the period of time during which the
Offer is open, and to amend, delay or terminate the Offer, see "SPECIAL
FACTORS -- The Merger Agreement."
 
     There can be no assurance that Parent will exercise its right to extend the
Offer (other than as required by applicable law). Any extension, waiver,
amendment or termination will be followed as promptly as practicable by public
announcement. In the case of an extension, Rule 14e-1(d) under the Exchange Act
requires that the announcement be issued no later than 9:00 a.m., New York City
time, on the next business day after the previously scheduled Expiration Date in
accordance with the public announcement requirements of Rule 14d-4(d) under the
Exchange Act. Subject to applicable law (including Rules 14d-4(c) and 14d-6(d)
under the Exchange Act, which require that any material change in the
information published, sent or given to stockholders in connection with the
Offer be promptly disseminated to stockholders in a manner reasonably designed
to inform stockholders of such change), and without limiting the manner in which
Parent may choose to make any public announcement, Parent will not have any
obligation to publish, advertise or otherwise communicate any such public
announcement other than by making a release to the Dow Jones News Service.
 
     If Parent extends the Offer or if Parent (whether before or after its
acceptance for payment of Shares) is delayed in its acceptance for payment of or
payment for Shares or it is unable to pay for Shares pursuant to the Offer for
any reason, then, without prejudice to Parent's rights under the Offer, the
Depositary may retain tendered Shares on behalf of Parent, and such Shares may
not be withdrawn except to the extent tendering stockholders are entitled to
withdrawal rights as described in "Withdrawal Rights." However, the ability of
Parent to delay the payment for Shares that Parent has accepted for payment is
limited by Rule 14e-1 under the Exchange Act, which requires that a bidder pay
the consideration offered or return the securities deposited by or on behalf of
holders of securities promptly after the termination or withdrawal of such
bidder's offer.
 
     If Parent makes a material change in the terms of the Offer or the
information concerning the Offer or waives a material condition of the Offer
(including, with the Company's consent (as recommended by the Special
Committee), a waiver of the Minimum Condition), Parent will disseminate
additional tender offer materials and extend the Offer to the extent required by
Rules 14d-4(c), 14d-6(d) and 14e-1 under the Exchange Act. The minimum period
during which an offer must remain open following material changes in the terms
of the Offer or information concerning the Offer, other than a change in price
or a change in the percentage of securities sought, will depend upon the facts
and circumstances then existing, including the relative materiality of the
changed terms or information. With respect to a change in price or a change in
the percentage of securities sought, a minimum period of 10 business days is
generally required to allow for adequate dissemination to stockholders.
 
                                       26
<PAGE>   29
 
     The Company has provided Parent with the Company's stockholder lists and
security position listings for the purpose of disseminating the Offer to holders
of the Shares. This Offer to Purchase, the related Letter of Transmittal and
other relevant materials will be mailed by the Company to record holders of
Shares and will be furnished by Parent to brokers, dealers, banks, trust
companies and similar persons whose names, or the names of whose nominees,
appear on the stockholder lists or, if applicable, who are listed as
participants in a clearing agency's security position listing, for subsequent
transmittal to beneficial owners of Shares.
 
PROCEDURE FOR TENDERING SHARES
 
     Valid Tender. For a stockholder validly to tender Shares pursuant to the
Offer, either (1) a properly completed and duly executed Letter of Transmittal
(or facsimile thereof), together with any required signature guarantees, or an
Agent's Message (as defined below) in connection with a book-entry delivery of
Shares, and any other documents required by the Letter of Transmittal, must be
received by the Depositary at one of its addresses set forth on the back cover
of this Offer to Purchase and either certificates for tendered Shares must be
received by the Depositary at one of such addresses or such Shares must be
delivered pursuant to the procedure for book-entry transfer set forth below (and
a Book-Entry Confirmation (as defined below) received by the Depositary), in
each case prior to the Expiration Date, or (2) the tendering stockholder must
comply with the guaranteed delivery procedure set forth below.
 
     Book-Entry Delivery. The Depositary will establish an account with respect
to the Shares at The Depository Trust Company (the "Book-Entry Transfer
Facility") for purposes of the Offer within two business days after the date of
this Offer. Any financial institution that is a participant in the Book-Entry
Transfer Facility's system may make book-entry delivery of Shares by causing the
Book-Entry Transfer Facility to transfer such Shares into the Depositary's
account in accordance with the Book-Entry Transfer Facility's procedures for
such transfer. However, although delivery of Shares may be effected through
book-entry transfer into the Depositary's account at the Book-Entry Transfer
Facility, the Letter of Transmittal (or facsimile thereof), properly completed
and duly executed, with any required signature guarantees, or an Agent's Message
in connection with a book-entry transfer, and any other required documents,
must, in any case, be transmitted to, and received by, the Depositary at one of
its addresses set forth on the back cover of this Offer to Purchase prior to the
Expiration Date, or the tendering stockholder must comply with the guaranteed
delivery procedure described below. The confirmation of a book-entry transfer of
Shares into the Depositary's account at the Book-Entry Transfer Facility as
described above is referred to herein as a "Book-Entry Confirmation." DELIVERY
OF DOCUMENTS TO THE BOOK-ENTRY TRANSFER FACILITY IN ACCORDANCE WITH THE
BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES DOES NOT CONSTITUTE DELIVERY TO THE
DEPOSITARY.
 
     THE METHOD OF DELIVERY OF SHARES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY,
IS AT THE ELECTION AND RISK OF THE TENDERING STOCKHOLDER. SHARES WILL BE DEEMED
DELIVERED ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF DELIVERY IS BY MAIL,
REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED.
IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.
 
     The term "Agent's Message" means a message, transmitted by the Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that the Book-Entry Transfer Facility has
received an express acknowledgment from the participant in the Book-Entry
Transfer Facility tendering the Shares, and, if applicable, Rights which are
subject to such Book-Entry Confirmation, that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal and that Parent may
enforce such agreement against such participant.
 
     Signature Guarantees. No signature guarantee is required on the Letter of
Transmittal if (1) the Letter of Transmittal is signed by the registered holder
of Shares (which term includes any participant in the Book-Entry Transfer
Facility's system whose name appears on a security position listing as the owner
of the Shares) tendered therewith and such registered holder has not completed
either the box entitled "Special Delivery
 
                                       27
<PAGE>   30
 
Instructions" or the box entitled "Special Payment Instructions" on the Letter
of Transmittal or (2) such Shares are tendered for the account of a firm that is
a member of the Medallion Signature Guaranty Program or by any other "eligible
guaranty institution" as such term is defined in Rule 17Ad-15 under the Exchange
Act (each of the foregoing being referred to as an "Eligible Institution"). In
all other cases, all signatures on the Letters of Transmittal must be guaranteed
by an Eligible Institution. See Instructions 1 and 5 to the Letter of
Transmittal. If the certificates for Shares are registered in the name of a
person other than the signer of the Letter of Transmittal, or if payment is to
be made or certificates for Shares not tendered or not accepted for payment are
to be issued to a person other than the registered holder of the certificates
surrendered, the tendered certificates must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name or names of
the registered holders or owners appear on the certificates, with the signatures
on the certificates or stock powers guaranteed as aforesaid. See Instruction 5
to the Letter of Transmittal.
 
     Guaranteed Delivery. If a stockholder desires to tender Shares pursuant to
the Offer and such stockholder's certificates for Shares are not immediately
available or the procedure for book-entry transfer cannot be completed on a
timely basis or time will not permit all required documents to reach the
Depositary prior to the Expiration Date, such stockholder's tender may be
effected if all the following conditions are met:
 
          (1) such tender is made by or through an Eligible Institution;
 
          (2) a properly completed and duly executed Notice of Guaranteed
     Delivery substantially in the form provided by Parent is received by the
     Depositary, as provided below, prior to the Expiration Date; and
 
          (3) the certificates for all tendered Shares, in proper form for
     transfer (or a Book-Entry Confirmation with respect to such Shares),
     together with a properly completed and duly executed Letter of Transmittal
     (or facsimile thereof), with any required signature guarantees (or, in the
     case of a book-entry transfer, or Agent's Message) and any other documents
     required by the Letter of Transmittal, are received by the Depositary
     within three trading days after the date of execution of such Notice of
     Guaranteed Delivery. A "trading day" is any day on which the New York Stock
     Exchange, Inc. is open for business.
 
     The Notice of Guaranteed Delivery may be delivered by hand to the
Depositary or transmitted by telegram, facsimile transmission or mail to the
Depositary and must include a guarantee by an Eligible Institution in the form
set forth in such Notice of Guaranteed Delivery.
 
     Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer will in all cases be made only after timely
receipt by the Depositary of (1) certificates for (or a timely Book-Entry
Confirmation with respect to) such Shares, (2) a Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, with any required
signature guarantees, or Agent's Message in connection with a book-entry
transfer, and (3) any other documents required by the Letter of Transmittal.
Accordingly, tendering stockholders may be paid at different times depending
upon when certificates for Shares or Book-Entry Confirmations are actually
received by the Depositary. UNDER NO CIRCUMSTANCES WILL INTEREST BE PAID ON THE
PURCHASE PRICE OF THE SHARES TO BE PAID BY PARENT, REGARDLESS OF ANY EXTENSION
OF THE OFFER OR ANY DELAY IN MAKING SUCH PAYMENT.
 
     The valid tender of Shares pursuant to one of the procedures described
above will constitute a binding agreement between the tendering stockholder and
Parent upon the terms and subject to the conditions of the Offer.
 
     Appointment. By executing a Letter of Transmittal as set forth above, the
tendering stockholder will irrevocably appoint designees of Parent as such
stockholder's attorneys-in-fact and proxies in the manner set forth in the
Letter of Transmittal, each with full power of substitution, to the full extent
of such stockholder's rights with respect to the Shares tendered by such
stockholder and accepted for payment by Parent and with respect to any and all
other Shares or other securities or rights issued or issuable in respect of such
Shares on or after March 15, 1999. All such proxies shall be considered coupled
with an interest in the tendered Shares.
 
                                       28
<PAGE>   31
 
Such appointment will be effective when, and only to the extent that, Parent
accepts for payment Shares tendered by such stockholder as provided herein. Upon
such acceptance for payment, all prior powers of attorney and proxies given by
such stockholder with respect to such Shares or other securities or rights will,
without further action, be revoked and no subsequent powers of attorney and
proxies may be given (and, if given, will not be deemed effective). The
designees of Parent will thereby be empowered to exercise voting and other
rights with respect to such Shares or other securities or rights in respect of
any annual, special or adjourned meeting of the Company's stockholders, or
otherwise, as they in their sole discretion deem proper. Parent reserves the
right to require that, in order for Shares to be deemed validly tendered,
immediately upon Parent's acceptance for payment of such Shares, Parent must be
able to exercise voting and other rights with respect to such Shares and other
securities or rights, including voting at any meeting of stockholders then
scheduled.
 
     Determination of Validity. All questions as to the validity, form,
eligibility (including time of receipt) and acceptance of any tender of Shares
will be determined by Parent in its sole discretion, which determination will be
final and binding. Parent reserves the absolute right to reject any or all
tenders determined by it not to be in proper form or the acceptance for payment
of or payment for which may, in the opinion of Parent's counsel, be unlawful.
Parent also reserves the absolute right to waive any defect or irregularity in
any tender with respect to any particular Shares, whether or not similar defects
or irregularities are waived in the case of other Shares. No tender of Shares
will be deemed to have been validly made until all defects or irregularities
relating thereto have been cured or waived. None of Parent, the Depositary, the
Information Agent or any other person will be under any duty to give
notification of any defects or any other person will be under any duty to give
notification of any defects or irregularities in tenders or incur any liability
for failure to give any such notification. Parent's interpretation of the terms
and conditions of the Offer (including the Letter of Transmittal and the
instructions thereto) will be final and binding.
 
     Backup Withholding. In order to avoid "backup withholding" of Federal
income tax on payments of cash pursuant to the Offer, a stockholder surrendering
Shares in the Offer must provide the Depositary with such stockholder's correct
TIN on a Substitute Form W-9 and certify under penalties of perjury that such
TIN is correct and that such stockholder is not subject to backup withholding.
Certain stockholders (including, among others, all corporations and certain
foreign individuals and entities) are not subject to backup withholding. If a
stockholder does not provide its correct TIN or fails to provide the
certifications described above, the Internal Revenue Service ("IRS") may impose
a penalty on such stockholder and payment of cash to such stockholder pursuant
to the Offer may be subject to backup withholding of 31%. All stockholders
surrendering Shares pursuant to the Offer should complete and sign the main
signature form and the Substitute Form W-9 included as part of the Letter of
Transmittal to provide the information and certification necessary to avoid
backup withholding (unless an applicable exemption exists and is proved in a
manner satisfactory to Parent and the Depositary). Non-corporate foreign
stockholders should complete and sign the main signature form and a Form W-8,
Certificate of Foreign Status, a copy of which may be obtained from the
Depositary, in order to avoid backup withholding. See Instruction 9 to the
Letter of Transmittal.
 
WITHDRAWAL RIGHTS
 
     Except as otherwise provided herein, tenders of Shares are irrevocable.
Shares tendered pursuant to the Offer may be withdrawn pursuant to the
procedures set forth below at any time prior to the Expiration Date.
 
     For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase and
must specify the name of the person having tendered the Shares to be withdrawn,
the number of Shares to be withdrawn and the name of the registered holder of
the Shares to be withdrawn, if different from the name of the person who
tendered the Shares. If certificates for Shares have been delivered or otherwise
identified to the Depositary, then, prior to the physical release of such
certificates, the serial numbers shown on such certificates must be submitted to
the Depositary and, unless such Shares have been tendered by an Eligible
Institution, the signatures on the notice of withdrawal must be guaranteed by an
Eligible Institution. Withdrawals of tenders of Shares may not be rescinded, and
any Shares properly withdrawn will thereafter be deemed not validly tendered for
any purposes of the Offer. However, withdrawn Shares may be retendered by
                                       29
<PAGE>   32
 
again following one of the procedures described in "Procedure for Tendering
Shares" at any time prior to the Expiration Date.
 
     All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by Parent in its sole discretion, which
determination will be final and binding. None of Parent, the Depositary, the
Information Agent, or any other person will be under any duty to give
notification of any defects or irregularities in any notice of withdrawal or
incur any liability for failure to give any such notification.
 
ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES
 
     Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any such extension
or amendment), Parent will accept for payment and will pay for all Shares
validly tendered prior to the Expiration Date and not properly withdrawn in
accordance with the procedures set forth in "Withdrawal Rights" as soon as
practicable after the later of (1) the Expiration Date and (2) the satisfaction
or waiver of the conditions set forth in "Certain Conditions of the Offer." For
a description of Parent's right or obligation to terminate the Offer and not
accept for payment or pay for Shares or to delay acceptance for payment or
payment for Shares, see "Certain Conditions of the Offer."
 
     In all cases, payment for Shares accepted for payment pursuant to the Offer
will be made only after timely receipt by the Depositary of (1) certificates for
such Shares (or timely Book-Entry Confirmation of a transfer of such Shares as
described in "Procedure for Tendering Shares"), (2) a Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, with any required
signature guarantees (or, in the case of a book-entry transfer, an Agent's
message), and (3) any other documents required by the Letter of Transmittal.
 
     For purposes of the Offer, Parent will be deemed to have accepted for
payment, and thereby purchased, Shares properly tendered to Parent and not
withdrawn as, if and when Parent gives oral or written notice to the Depositary
of Parent's acceptance for payment of such Shares. Payment for Shares accepted
for payment pursuant to the Offer will be made by deposit of the purchase price
therefor with the Depositary, which will act as agent for tendering stockholders
for the purpose of receiving payment from Parent and transmitting payment to
tendering stockholders. UNDER NO CIRCUMSTANCES WILL INTEREST BE PAID ON THE
PURCHASE PRICE OF THE SHARES TO BE PAID BY PARENT, REGARDLESS OF ANY EXTENSION
OF THE OFFER OR ANY DELAY IN MAKING SUCH PAYMENT.
 
     If Parent is delayed in its acceptance for payment of or payment for Shares
or is unable to accept for payment or pay for Shares pursuant to the Offer for
any reason, then, without prejudice to Parent's rights under the Offer (but
subject to compliance with Rule 14e-1(c) under the Exchange Act, which requires
that a tender offeror pay the consideration offered or return the tendered
securities promptly after the termination or withdrawal of a tender offer), the
Depositary may, nevertheless, on behalf of Parent, retain tendered Shares. Any
such Shares may not be withdrawn except to the extent tendering stockholders are
entitled to exercise, and duly exercise, withdrawal rights as described in
"Withdrawal Rights."
 
     If any tendered Shares are not purchased pursuant to the Offer because of
an invalid tender or otherwise, certificates for any such Shares will be
returned, without expense to the tendering stockholder (or, in the case of
Shares delivered by book-entry transfer of such Shares into the Depositary's
account at the Book-Entry Transfer Facility pursuant to the procedure set forth
in "Procedure for Tendering Shares," such Shares will be credited to an account
maintained at the Book-Entry Transfer Facility), as promptly as practicable
after the expiration or termination of the Offer.
 
     Parent reserves the right to transfer or assign, in whole or from time to
time in part, to one or more of its direct or indirect wholly-owned
subsidiaries, the right to purchase Shares tendered pursuant to the Offer, but
any such transfer or assignment will not relieve Parent of its obligations under
the Offer and will in no way prejudice the rights of tendering stockholders to
receive payment for Shares validly tendered and accepted for payment pursuant to
the Offer.
 
                                       30
<PAGE>   33
 
PRICE RANGE OF THE SHARES; DIVIDENDS
 
     The Shares are listed and traded on the Nasdaq National Market under the
symbol "TRED." The following table sets forth, for each of the periods
indicated, the high and low sales prices, the dividends per Share and the
average daily trading volume as published in financial sources.
 
<TABLE>
<CAPTION>
                                                            HIGH      LOW     DIVIDENDS   VOLUME
                                                           -------   ------   ---------   ------
<S>                                                        <C>       <C>      <C>         <C>
1997
  First Quarter.........................................   $10.500   $8.625     $.04      2,636
  Second Quarter........................................   $10.500   $8.125     $.04      4,550
  Third Quarter.........................................   $12.750   $9.375     $.04      7,579
  Fourth Quarter........................................   $13.500   $9.125     $ --      3,784
1998
  First Quarter.........................................   $10.000   $7.000     $ --      2,886
  Second Quarter........................................   $10.125   $7.625     $ --      1,821
  Third Quarter.........................................   $ 9.375   $5.375     $ --      5,852
  Fourth Quarter........................................   $ 7.500   $4.750     $ --      4,823
1999
  First Quarter.........................................   $ 9.500   $6.063     $ --      2,580
     (through March 19, 1999)
</TABLE>
 
     On January 21, 1999, the last full day of trading before the public
announcement of the Proposal, the reported closing sales price of the Shares was
$6.50 per Share. On March 15, 1999, the last full day of trading before the
public announcement of the execution of the Merger Agreement, the reported
closing sales price of the Shares was $8.6875 per Share. On March 19, 1999, the
reported closing sales price of the Shares was $8.875 per Share. STOCKHOLDERS
ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR THE SHARES.
 
     In October 1997, the Board of Directors of the Company suspended the
Company's regular quarterly dividend to provide additional funds for working
capital and growth opportunities.
 
     Pursuant to the Merger Agreement, the Company has agreed not to declare,
set aside, make or pay any dividend or distribution on the Shares.
 
CERTAIN INFORMATION CONCERNING PARENT AND NEWCO
 
     General. Parent, a Delaware corporation, is a diversified holding company
that provides national and regional transportation of general commodities
through its motor carrier subsidiaries, and domestic and international
intermodal freight services, utilizing a variety of transportation modes
including over-the-road, rail, ocean and air, through its intermodal
subsidiaries. The principal offices of Parent are located at 3801 Old Greenwood
Road, Fort Smith, Arkansas 72903.
 
     Selected Financial Information. Set forth below is certain selected
consolidated financial information with respect to Parent excerpted or derived
from the information contained in Parent's Annual Report on Form 10-K for the
year ended December 31, 1998 (the "Parent 10-K"), which is incorporated by
reference herein. More comprehensive financial information is included in the
Parent 10-K and other documents filed by Parent with the Commission, and the
following summary is qualified in its entirety by reference to the Parent 10-K
and such other documents and all the financial information (including any
related notes) contained therein. The Parent 10-K and other documents should be
available for inspection and copies thereof should be obtainable in the manner
set forth below under "Available Information."
 
                                       31
<PAGE>   34
 
                           ARKANSAS BEST CORPORATION
 
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31,
                                                           ------------------------------------
                                                              1998         1997         1996
                                                           ----------   ----------   ----------
<S>                                                        <C>          <C>          <C>
STATEMENT OF EARNINGS DATA:
  Operating revenues.....................................  $1,651,453   $1,643,678   $1,604,335
  Operating income (loss)................................      66,410       62,908      (18,008)
  Minority interest in subsidiary........................       3,257       (1,359)      (1,768)
  Other expenses, net....................................       3,259        8,916        5,906
  Gain on sale of Cardinal Freight Carriers, Inc.........          --        8,985           --
  Settlement of Litigation...............................       9,124           --           --
  Interest expense.......................................      18,438       23,978       30,843
  Income (loss) from continuing operations before income
     taxes...............................................      50,580       40,358      (52,989)
  Provision (credit) for income taxes....................      21,905       19,389      (18,782)
  Income (loss) from continuing operations...............      28,675       20,969      (34,207)
  Loss from discontinued operations, net of tax..........          --       (5,622)      (2,396)
  Net income (loss)......................................  $   28,675   $   15,347   $  (36,603)
  Income (loss) per share from continuing operations
     (diluted)...........................................  $     1.21   $     0.84   $    (1.98)
  Net income (loss) per common share (diluted)...........  $     1.21   $     0.56   $    (2.10)
  Cash dividends paid per common share...................          --           --   $     0.01
</TABLE>
 
<TABLE>
<CAPTION>
                                                                    AS OF DECEMBER 31,
                                                           ------------------------------------
                                                              1998         1997         1996
                                                           ----------   ----------   ----------
<S>                                                        <C>          <C>          <C>
BALANCE SHEET DATA:
  Total assets...........................................  $  710,604   $  698,339   $  828,181
  Current portion of long-term debt......................      17,504       16,484       37,197
  Long-term debt (including capital leases and excluding
     current portion)....................................     196,079      202,604      317,874
</TABLE>
 
                                       32
<PAGE>   35
 
     Newco. Newco, a Delaware corporation and a wholly owned subsidiary of
Parent, was organized to merge with and into the Company upon consummation of
the Merger and has not conducted any unrelated activities since its
organization. The principal offices of Newco are located at 3801 Old Greenwood
Road, Fort Smith, Arkansas 72903. All outstanding shares of capital stock of
Newco are owned by Parent.
 
     Miscellaneous. Except as described in this Offer to Purchase, neither
Parent nor Newco (together, the "Corporate Entities") or, to the best knowledge
of the Corporate Entities, any of the persons listed in ANNEX C or any associate
or majority-owned subsidiary of the Corporate Entities or any of the persons so
listed, beneficially owns any equity security of the Company, and none of the
Corporate Entities, any of the other persons referred to above, or any of the
respective directors, executive officers or subsidiaries of any of the
foregoing, has effected any transaction in any equity security of the Company
during the past 60 days.
 
     Except as described in this Offer to Purchase, (i) there have not been any
contacts, transactions or negotiations between the Corporate Entities, any of
their respective subsidiaries or, to the best knowledge of the Corporate
Entities, any of the persons listed in ANNEX C, on the one hand, and the Company
or any of its directors, officers or affiliates, on the other hand, that are
required to be disclosed pursuant to the rules and regulations of the Commission
and (ii) none of the Corporate Entities or, to the best knowledge of the
Corporate Entities, any of the persons listed in ANNEX C has any contract,
arrangement, understanding or relationship with any person with respect to any
securities of the Company.
 
     During the last five years none of the Corporate Entities nor, to the best
knowledge of the Corporate Entities, any of the persons listed in ANNEX C (i)
has been convicted in a criminal proceeding (excluding traffic violations and
similar misdemeanors) or (ii) was a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree of final order enjoining future
violations of, or prohibiting activities subject to, Federal or state securities
laws or finding any violation of such laws. The name, business address, present
principal occupation or employment, five-year employment history and citizenship
of each of the directors and executive officers of Parent and Newco are set
forth in ANNEX C.
 
CERTAIN INFORMATION CONCERNING THE COMPANY
 
     General. The Company is a Delaware corporation with its principal executive
offices at 1101 South 21st Street, Fort Smith, Arkansas 72901. The Company is
the nation's largest independent tire retreader for the trucking industry and
the fourth largest commercial truck tire dealer.
 
     Selected Financial Information. Set forth below is certain selected
financial information with respect to the Company excerpted or derived from the
information contained in the Company's Annual Report on Form 10-K for the year
ended December 31, 1998 (the "Company Form 10-K"), which is incorporated by
reference herein. More comprehensive financial information is included in the
Company Form 10-K and other documents filed by the Company with the Commission,
and the following summary is qualified in its entirety by reference to the
Company Form 10-K and such other documents and all the financial information
(including any related notes) contained therein. The Company Form 10-K and other
documents should be available for inspection and copies thereof should be
obtainable in the manner set forth below under "Available Information."
 
                                       33
<PAGE>   36
 
                                 TREADCO, INC.
 
                         SELECTED FINANCIAL INFORMATION
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                    ----------------------------------------------------------
                                      1998         1997         1996         1995       1994
                                    --------     --------     --------     --------   --------
<S>                                 <C>          <C>          <C>          <C>        <C>
STATEMENT OF EARNINGS DATA:
  Revenues........................  $181,293     $161,276     $144,154     $147,906   $140,678
  Costs and expenses..............   178,801      163,785      149,337      142,920    129,162
  Operating income (loss).........     2,492       (2,509)      (5,183)       4,986     11,516
  Interest expense................    (1,086)      (1,213)        (873)        (461)      (236)
  Amortization expense............      (636)        (723)        (723)        (723)      (738)
  Other income....................       579          567        1,427          300        232
  Settlement of litigation........     9,124(1)        --           --           --         --
  Income (loss) before income
     taxes........................    10,473       (3,878)      (5,352)       4,102     10,774
  Provision (credit) for income
     taxes........................     4,092       (1,374)      (2,093)       1,711      4,265
  Net income (loss)...............  $  6,381(1)  $ (2,504)    $ (3,259)    $  2,391   $  6,509
  Net income (loss) per share:
     Basic........................  $   1.26(1)  $   (.49)    $   (.64)    $    .47   $   1.29
     Diluted......................  $   1.25(1)  $   (.49)    $   (.64)    $    .47   $   1.28
  Average shares outstanding:
     Basic........................     5,072        5,072        5,072        5,072      5,055
     Diluted......................     5,092        5,072        5,072        5,074      5,066
  Cash dividends paid per share...  $     --     $    .12     $    .16     $    .16   $    .16
</TABLE>
 
<TABLE>
<CAPTION>
                                                        AS OF DECEMBER 31,
                                    ----------------------------------------------------------
                                      1998         1997         1996         1995       1994
                                    --------     --------     --------     --------   --------
<S>                                 <C>          <C>          <C>          <C>        <C>
BALANCE SHEET DATA:
  Working capital.................  $ 23,673     $ 27,273     $ 34,043     $ 44,878   $ 37,364
  Total assets....................   107,370      100,458      105,416       93,035     89,583
  Current portion of long-term
     debt.........................     2,545        2,305        1,645          863        123
  Long-term debt (less current
     portion).....................     6,159       12,884       19,610       10,000      3,863
  Stockholders' equity............    65,216       58,835       61,948       66,018     64,438
</TABLE>
 
<TABLE>
<CAPTION>
                                                        AS OF DECEMBER 31,
                                    ----------------------------------------------------------
                                      1998         1997         1996         1995       1994
                                    --------     --------     --------     --------   --------
<S>                                 <C>          <C>          <C>          <C>        <C>
OTHER DATA:
  Ratio of earnings to fixed
     charges......................     9.5:1        -- (2)       -- (2)       8.3:1     33.5:1
  Book value per share............  $  12.86     $  11.60     $  12.21     $  13.02   $  12.74
</TABLE>
 
- ---------------
 
(1) Settlement of the Bandag arbitration resulted in a one-time cash payment of
    $9.995 million to the Company and in after-tax income of approximately $5.4
    million or $1.06 per Share.
 
(2) Earnings were inadequate to cover fixed charges. The deficiency was $3.878
    million for 1997 and $5.352 million for 1996.
 
                                       34
<PAGE>   37
 
     Miscellaneous. Except as described in this Offer to Purchase, neither the
Company or, to the best knowledge of the Company, any of the persons listed in
ANNEX D or any associate or majority-owned subsidiary of the Company or any of
the persons so listed, beneficially owns any equity security of the Company, and
none of the Company, any of the other persons referred to above, or any of the
respective directors, executive officers or subsidiaries of any of the
foregoing, has effected any transaction in any equity security of the Company
during the past 60 days.
 
     Except as described in this Offer to Purchase, (i) there have not been any
contracts, transactions or negotiations between the Company and, to the best
knowledge of the Company, any of the persons listed in ANNEX D that are required
to be disclosed pursuant to the rules and regulations of the Commission and (ii)
neither the Company nor, to the best knowledge of the Company, any of the
persons listed in ANNEX D has any contract, arrangement, understanding or
relationship with any person with respect to any securities of the Company.
 
     During the last five years neither the Company nor, to the best knowledge
of the Company, any of the persons listed in ANNEX D (i) has been convicted in a
criminal proceeding (excluding traffic violations and similar misdemeanors) or
(ii) was a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction and as a result of such proceeding was or is subject to a
judgment, decree of final order enjoining future violations of, or prohibiting
activities subject to, Federal or state securities laws or finding any violation
of such laws. The name, business address, present principal occupation or
employment, five-year employment history and citizenship of each of the
directors and executive officers of the Company are set forth in ANNEX D.
 
AVAILABLE INFORMATION
 
     Parent and the Company are each subject to the reporting requirements of
the Exchange Act and, in accordance therewith, are required to file reports and
other information with the Commission relating to their respective businesses,
financial condition and other matters. Information as of particular dates
concerning each of Parent's and the Company's directors and officers, their
remuneration, the principal holders of Parent's and the Company's securities and
any material interest of such persons in transactions with Parent or the Company
is required to be disclosed in the respective proxy statements distributed to
each of Parent's and the Company's stockholders and filed with the Commission.
Such reports, proxy statements and other information should be available for
inspection at the public reference facilities of the Commission located at 450
Fifth Street, N.W., Washington, D.C. 20549, and at the regional offices of the
Commission located in the Northwestern Atrium Center, 500 West Madison Street
(Suite 1400), Chicago, Illinois 6661 and Seven World Trade Center, 13th Floor,
New York, New York 10048. Copies should be obtainable, by mail, upon payment of
the Commission's customary charges, by writing to the Commission's principal
office at 450 Fifth Street, N.W., Washington, D.C. 20549, and can be obtained
electronically on the Commission's website at http://www.sec.gov. Such
information should also be on file at the Nasdaq National Market, 1735 K Street,
N.W., Washington, D.C. 20006. After consummation of the Merger, the Company will
no longer file reports, proxy statements or other information with the
Commission. See "THE TENDER OFFER -- Certain Effects of the Offer and Merger."
 
SOURCE AND AMOUNT OF FUNDS
 
     The total amount of funds required by Parent to acquire all of the
outstanding Shares pursuant to the Offer, consummate the Merger and to pay fees
and expenses related to the Offer and the Merger is estimated to be
approximately $24.3 million. See "Fees and Expenses." Parent expects to obtain
the funds required to consummate the Offer and Merger through the use of a
combination of (i) cash on hand, working capital and other internally-generated
funds and (ii) borrowings under a $250 million existing bank credit facility.
The Offer is not conditioned upon Parent receiving any financing. See "Certain
Conditions of the Offer."
 
     Pursuant to a $250 million Credit Agreement dated June 12, 1998, among
Parent, Societe Generale, Southwest Agency, as Administrative Agent, and Bank of
America National Trust Savings Association and Wells Fargo Bank (Texas), N.A.,
as Co-Documentation Agents and the other banks that are parties thereto,
 
                                       35
<PAGE>   38
 
as amended (the "Parent Credit Agreement"), Parent may borrow up to an aggregate
of $250 million for general corporate purposes on a revolving basis. As of
December 31, 1998, Parent had $92.6 million in borrowing availability under the
Parent Credit Agreement. The Parent Credit Agreement expires June 12, 2003, and
loans under the Parent Credit Agreement currently bear interest at LIBOR plus
 .625%. Loans under the Parent Credit Agreement are secured by substantially all
of Parent's accounts receivable and revenue equipment.
 
     It is anticipated that the indebtedness incurred by Parent in connection
with the Offer and the Merger will be repaid from funds generated internally by
Parent and its subsidiaries (including, after the Merger, if consummated, funds
generated by the Surviving Corporation) and through other sources which may
include the proceeds of future bank financings, the public or private sale of
debt or equity securities or a combination thereof. No decisions have been made,
however, concerning the method Parent will employ to repay such indebtedness.
Such decisions, when made, will be based on Parent's review from time to time of
the advisability of particular actions, as well as on prevailing interest rates
and financial and other economic conditions.
 
DIVIDENDS AND DISTRIBUTIONS
 
     If on or after the date of the Merger Agreement, the Company should (i)
split, combine or otherwise change the Shares or its capitalization, (ii) issue
or sell any additional securities of the Company or otherwise cause an increase
in the number of outstanding securities of the Company (except for Shares
issuable upon the exercise of employee stock options outstanding on the date of
the Merger Agreement) or (iii) acquire currently outstanding Shares or otherwise
cause a reduction in the number of outstanding Shares, then, without prejudice
to Parent's rights set forth in "Terms of the Offer" and "Certain Conditions of
the Offer," Parent in its sole discretion, subject to the terms of the Merger
Agreement, may make such adjustments as it deems appropriate to the purchase
price and other terms of the Offer.
 
     If, on or after the date of the Merger Agreement, the Company should
declare or pay any dividend on the Shares or make any distribution (including,
without limitation, cash dividends, the issuance of additional Shares pursuant
to a stock dividend or stock split, the issuance of other securities or the
issuance of rights for the purchase of any securities) with respect to the
Shares that is payable or distributable to stockholders of record on a date
prior to the transfer to the name of Parent or its nominee or transferee on the
Company's stock transfer records of the Shares purchased pursuant to the Offer,
then, without prejudice to Parent's rights set forth in "Terms of the Offer" and
"Certain Conditions of the Offer," any such dividend, distribution or right to
be received by the tendering stockholders will be received and held by the
tendering stockholder at the Depositary for the account of Parent, accompanied
by appropriate documentation of transfer. Pending such remittance and subject to
applicable law, Parent will be entitled to all rights and privileges as owner of
any such dividend, distribution or right and may withhold the entire purchase
price or deduct from the purchase price the amount or value thereof, as
determined by Parent in its sole discretion.
 
     Pursuant to the terms of the Merger Agreement, the Company is prohibited
from taking any of the actions described in the two preceding paragraphs and
nothing herein shall constitute a waiver by Parent of any of its rights under
the Merger Agreement or a limitation of remedies available to Parent for any
breach of the Merger Agreement, including termination thereof.
 
CERTAIN CONDITIONS OF THE OFFER
 
     Notwithstanding any other provisions of the Offer, Parent shall not be
required to accept for payment or pay for and may delay the acceptance for
payment of, or the payment for, any Shares, and may terminate the Offer and not
accept for payment or pay for any Shares, if (i) immediately prior to the
expiration of the Offer (as it may be extended in accordance with the Offer),
the Minimum Condition shall not have been satisfied, (ii) any applicable waiting
period under the HSR Act shall not have expired or been terminated prior to the
expiration of the Offer; (iii) any required consent, permit or authorization
from any regulatory or governmen-
 
                                       36
<PAGE>   39
 
tal authority has not been obtained; or (iv) at any time prior to the acceptance
for payment of Shares, Parent makes a determination (which shall be made in good
faith) that any of the following conditions exist:
 
          (a) any of the representations or warranties of the Company contained
     in the Merger Agreement is not true and correct at and as of any date on or
     prior to the Expiration Date as if made at and as of such time, except for
     (i) failures to be true and correct as would not have a Company Material
     Adverse Effect or were known to Parent as of the date of the Merger
     Agreement; and (ii) failures to comply as are capable of being and are
     cured prior to the earlier of (A) 10 days after written notice from Parent
     to the Company of such failure or (B) two business days prior to the
     Expiration Date;
 
          (b) the Company has failed to comply with any of its obligations under
     the Merger Agreement, except for (i) failures to so comply as would not
     have a Company Material Adverse Effect or were known to Parent as of the
     date of the Merger Agreement; and (ii) failures to comply as are capable of
     being and are cured prior to the earlier of (A) 10 days after written
     notice from Parent to the Company of such failure or (B) two business days
     prior to the Expiration Date;
 
          (c) the Special Committee or the Board has withdrawn or modified in
     any respect adverse to Parent its recommendation of the Offer or taken any
     position inconsistent with such recommendation;
 
          (d) the Merger Agreement has been terminated in accordance with its
     terms;
 
          (e) the Company has reached an agreement with Parent that the Offer or
     the Merger be terminated or amended;
 
          (f) any state, federal, or foreign government, or governmental
     authority has taken any action, or proposed, sought, promulgated, or
     enacted, or any state, federal, or foreign government or governmental
     authority or court has entered, enforced, or deemed applicable to the Offer
     or the Merger, any statute, rule, regulation, judgment, order, or
     injunction that would (i) make the acceptance for payment of, the payment
     for, or the purchase of, some or all of the Shares illegal or otherwise
     restrict, materially delay, prohibit consummation of, or make materially
     more costly, the Offer or the Merger, (ii) result in a material delay in or
     restrict the ability of Parent, or render Parent unable, to accept for
     payment, pay for or purchase some or all of the Shares in the Offer, (iii)
     require the divestiture by Parent, Newco, or the Company or any of their
     respective subsidiaries or affiliates of all or any material portion of the
     business, assets, or property of any of them or any Shares, or impose any
     material limitation on the ability of any of them to conduct their business
     and own such assets, properties, and Shares, (iv) impose material
     limitations on the ability of Parent to hold or to exercise effectively all
     rights of ownership of the Shares, including the right to vote any Shares
     on all matters properly presented to the stockholders of the Company, or
     (v) impose any limitations on the ability of Parent, Newco, or any of their
     respective subsidiaries or affiliates effectively to control in any
     material respect the business or operations of the Company, Parent, Newco,
     or any of their respective subsidiaries or affiliates;
 
          (g) any change (or any condition, event or development involving a
     prospective change) has occurred or been threatened in the business,
     properties, assets, liabilities, capitalization, stockholders' equity,
     financial condition, operations, licenses or franchises, results of
     operations, or prospects of the Company, that would have a Company Material
     Adverse Effect;
 
          (h) there has occurred (i) any general suspension of trading in, or
     limitation on prices for, securities on any national securities exchange or
     in the over-the-counter market or quotations for shares traded thereon as
     reported by the Nasdaq or otherwise, (ii) a declaration of a banking
     moratorium or any suspension of payments in respect of banks in the United
     States (whether or not mandatory), (iii) any limitation (whether or not
     mandatory) by any governmental authority on the extension of credit by
     banks or other financial institutions, (iv) after the date of the Merger
     Agreement, an aggregate decline of at least 25% in the Dow Jones Industrial
     Average or Russell 2000 Index or a decline in either such index of 12 1/2%
     in any 24-hour period, or (v) in the case of any of the occurrences
     referred to in clauses (i) through (iv) existing at the time of the
     commencement of the Offer, in the reasonable judgment of Parent, a material
     acceleration or worsening thereof; or
 
                                       37
<PAGE>   40
 
          (i) any approval, permit, authorization, consent, or waiting period of
     any domestic or foreign, governmental, administrative, or regulatory entity
     (federal, state, local, provincial or otherwise) has not been obtained or
     satisfied on terms satisfactory to Parent in its reasonable discretion and
     the failure to obtain such consent, approval or authorization would have a
     Parent or Company Material Adverse Effect;
 
that, in the good faith judgment of Parent and regardless of the circumstances
(including any action or inaction by Parent, or any of its affiliates) giving
rise to any such condition, makes it inadvisable to proceed with the Offer or
with such acceptance for payment of, or payment for, Shares or to proceed with
the Merger.
 
     "Company Material Adverse Effect" means any change or effect that,
individually or when taken together with all such other changes or effects,
would be materially adverse to the condition (financial or other), business,
operations, properties, assets, liabilities, prospects, or results of operations
of the Company.
 
     "Parent Material Adverse Effect" means any change or effect that,
individually or when taken together with all such other changes or effects,
would be materially adverse to the condition (financial or other), business,
operations, properties, assets, liabilities, prospects, or results of operations
of Parent and its subsidiaries taken as a whole.
 
CERTAIN LEGAL MATTERS; REGULATORY MATTERS
 
     Neither Parent nor Newco is aware of any license or regulatory permit that
appears to be material to the business of the Company that might be adversely
affected by Parent's acquisition of Shares as contemplated herein or of any
approval or other action, except as otherwise described herein, by any
governmental entity that would be required for the acquisition or ownership of
Shares by Parent as contemplated herein. Should any such approval or other
action be required, Parent and Newco currently contemplate that such approval or
other action will be sought. While, except as otherwise expressly described
herein, Parent does not presently intend to delay the acceptance for payment of
or payment for Shares tendered pursuant to the Offer pending the outcome of any
such matter, there can be no assurance that any such approval or other action,
if needed, would be obtained or would be obtained without substantial conditions
or that failure to obtain any such approval or other action might not result in
consequences adverse to the Company's business or that certain parts of the
Company's business might not have to be disposed of if such approvals were not
obtained or such other actions were not taken. Because of the failure of such
approvals or other actions or because of conditions to be imposed in connection
with such approvals or other actions, Parent could decline to accept for payment
or pay for any Shares. See "Certain Conditions of the Offer."
 
     State Takeover Laws. A number of states throughout the United States have
enacted takeover statutes that purport, in varying degrees, to be applicable to
attempts to acquire securities of corporations that are incorporated or have
assets, stockholders, executive offices or places of business in such states. In
Edgar v. MITE Corp., the Supreme Court of the United States held that the
Illinois Business Takeover Act, which involved state securities laws that made
the takeover of certain corporations more difficult, imposed a substantial
burden on interstate commerce and therefore was unconstitutional. In CTS Corp.
v. Dynamics Corp. of America, however, the Supreme Court of the United States
held that a state may, as a matter of corporate law and, in particular, those
laws concerning corporate governance, constitutionally disqualify a potential
acquiror from voting on the affairs of a target corporation without prior
approval of the remaining stockholders, provided that such laws were applicable
only under certain conditions.
 
     Section 203 of the DGCL limits the ability of a Delaware corporation to
engage in business combinations with "interested stockholders" (defined as any
beneficial owner of 15% or more of the outstanding voting stock of the
corporation) unless, among other things, the corporation's board of directors
has given its prior approval to either the business combination or the
transaction which resulted in the stockholder becoming an "interested
stockholder." In accordance with the DGCL, the Company's certificate of
incorporation specifically exempts Parent from being deemed an "interested
stockholder" and, therefore, Section 203 of DGCL is inapplicable to the Merger.
 
     Parent and Newco do not believe that any state takeover statutes purport to
apply to the Offer or the Merger. Neither Parent nor Newco has currently
complied with any state takeover statute or regulation.
                                       38
<PAGE>   41
 
Parent reserves the right to challenge the applicability or validity of any
state law purportedly applicable to the Offer or the Merger and nothing in this
Offer to Purchase or any action taken in connection with the Offer or the Merger
is intended as a waiver of such right. If it is asserted that any state takeover
statute is applicable to the Offer or the Merger and an appropriate court does
not determine that it is inapplicable or invalid as applied to the Offer or the
Merger, Parent might be required to file certain information with, or to receive
approvals from, the relevant state authorities, and Parent might be unable to
accept for payment or pay for Shares tendered pursuant to the Offer, or be
delayed in consummating the Offer or the Merger. In such case, Parent may not be
obliged to accept for payment or pay for any Shares tendered pursuant to the
Offer.
 
     Antitrust. Under the provisions of the HSR Act applicable to the Offer, the
purchase of Shares under the Offer may be consummated following the expiration
of a 15-calendar day waiting period following the filing by Parent of a
Notification and Report Form with respect to the Offer, unless Parent receives a
request for additional information or documentary material from the Antitrust
Division of the Department of Justice (the "Antitrust Division") or the Federal
Trade Commission (the "FTC") or unless early termination of the waiting period
is granted. Parent is in the process of making such filing. If, within the
initial 15-day waiting period, either the Antitrust Division or the FTC requests
additional information or material from Parent concerning the Offer, the waiting
period will be extended and would expire at 11:59 p.m., New York City time, on
the tenth calendar day after the date of substantial compliance by Parent with
such request. Only one extension of the waiting period pursuant to a request for
additional information is authorized by the HSR Act. Thereafter, such waiting
period may be extended only by court order or with the consent of Parent. In
practice, complying with a request for additional information or material can
take a significant amount of time. In addition, if the Antitrust Division or the
FTC raises substantive issues in connection with a proposed transaction, the
parties frequently engage in negotiations with the relevant governmental agency
concerning possible means of addressing those issues and may agree to delay
consummation of the transaction while such negotiations continue.
 
     The Merger would not require an additional filing under the HSR Act if
Parent owns 50% or more of the outstanding Shares at the time of the Merger or
if the Merger occurs within one year after the HSR Act waiting period applicable
to the Offer expires or is terminated.
 
     The FTC and the Antitrust Division frequently scrutinize the legality under
the antitrust laws of the transactions such as Parent's proposed acquisition of
the Company. At any time before or after Parent's purchase of Shares pursuant to
the Offer, the Antitrust Division or FTC could take such action under the
antitrust laws as it deems necessary or desirable in the public interest,
including seeking to enjoin the purchase of Shares pursuant to the Offer or the
consummation of the Merger or seeking the divestiture of Shares acquired by
Parent or the divestiture of substantial assets of Parent or its subsidiaries,
or the Company. Private parties may also bring legal action under the antitrust
laws under certain circumstances. There can be no assurance that a challenge to
the Offer on antitrust grounds will not be made or, if such a challenge is made,
of the results thereof.
 
FEES AND EXPENSES
 
     Morgan Stanley has provided certain financial advisory services to Parent
in connection with the Offer. See "SPECIAL FACTORS -- Background of the Offer
and the Merger." Morgan Stanley will receive customary compensation for its
services, be reimbursed its out-of-pocket expenses, and has been indemnified
against certain liabilities and expenses in connection therewith, including
certain liabilities under the federal securities laws.
 
     Parent has retained D.F. King & Co., Inc. to act as the Information Agent
and Harris Trust and Savings Bank to act as the Depositary in connection with
the Offer. The Information Agent and the Depositary each will receive reasonable
and customary compensation for their services, be reimbursed for certain
reasonable out-of-pocket expenses and be indemnified against certain liabilities
and expenses in connection therewith, including certain liabilities under the
federal securities laws.
 
     Parent will not pay any fees or commissions to any broker or dealer or
other person (other than the Information Agent) in connection with the
solicitation of tenders of Shares pursuant to the Offer. Brokers,
                                       39
<PAGE>   42
 
dealers, banks and trust companies will be reimbursed by Parent upon request for
customary mailing and handling expenses incurred by them in forwarding material
to their customers.
 
     Certain employees of the Company have assisted Parent with respect to the
Transaction, primarily by providing information concerning the Company for the
preparation of this Offer to Purchase to comply with the requirements under the
Exchange Act. No employee of the Company has, or will, receive any additional or
separate compensation for such services. Pursuant to resolution of the Board,
each Board member receives a fee of $500 for each committee meeting attended.
Each of the members of the Special Committee will receive an aggregate of $2,500
in meeting fees in connection with their services to date.
 
     The Merger Agreement provides that all expenses incurred in connection with
the Offer and the Merger will be paid by the party incurring such costs and
expenses. The following in an estimate of expenses to be incurred in connection
with the Offer and the Merger.
 
<TABLE>
<S>                                                            <C>
EXPENSES TO BE PAID BY PARENT AND NEWCO:
  Financial Advisory and Legal Fees and Expenses............   $350,000
  Printing and Mailing......................................   $ 75,000
  Filing Fees...............................................   $ 50,000
  Depositary Fees...........................................   $  7,500
  Information Agent Fees....................................   $  5,000
  Miscellaneous.............................................   $ 10,000
                                                               --------
          TOTAL.............................................   $497,500
                                                               ========
EXPENSES TO BE PAID BY THE COMPANY:
  Financial Advisory and Legal Fees and Expenses............   $275,000
  Printing and Mailing Fees.................................   $ 25,000
  Miscellaneous.............................................   $ 10,000
                                                               --------
          TOTAL.............................................   $310,000
                                                               ========
</TABLE>
 
MISCELLANEOUS
 
     The Offer is not being made to (nor will tenders be accepted from or on
behalf of) holders of Shares in any jurisdiction in which the making of the
Offer or the acceptance thereof would not be in compliance with the laws of such
jurisdiction. Parent is not aware of any jurisdiction in which the making of the
Offer or the tender of Shares in connection therewith would not be in compliance
with the laws of such jurisdiction. To the extent Parent becomes aware of any
state law that would limit the class of offerees in the Offer, Parent will amend
the Offer and, depending on the timing of such amendment, if any, will extend
the Offer to provide adequate dissemination of such information to holders of
Shares prior to the expiration of the Offer. In any jurisdiction the securities,
blue sky or other laws of which require the Offer to be made by a licensed
broker or dealer, the Offer is being made on behalf of Parent by one or more
registered brokers or dealers licensed under the laws of such jurisdiction.
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION ON BEHALF OF PARENT NOT CONTAINED HEREIN OR IN THE LETTER OF
TRANSMITTAL AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED.
 
                                       40
<PAGE>   43
 
     Parent has filed with the Commission Schedules 13E-3 and 14D-1 pursuant to
Rules 13e-3 and 14d-3 and under the Exchange Act, furnishing certain additional
information with respect to the Offer. In addition, the Company has filed with
the Commission a Schedule 14D-9 pursuant to Rule 14d-9 under the Exchange Act,
furnishing certain additional related information. Such Schedules and any
amendments thereto, including exhibits, should be available for inspection and
copies should be obtainable in the manner set forth in "Available Information"
(except that they will not be available at the regional offices of the
Commission).
 
                                            ARKANSAS BEST CORPORATION
 
                                       41
<PAGE>   44
 
                                                                         ANNEX A
                                 STEPHENS INC.
 
                                 March 15, 1999
The Special Committee of the
Board of Directors of
TREADCO, INC.
1101 South 21st Street
Fort Smith, AR 72901
 
Gentlemen:
 
     We have acted as your financial advisor in connection with the proposed
merger of Treadco, Inc. (the "Company") with Treadco Acquisition Corp., a wholly
owned subsidiary of Arkansas Best Corporation, Inc. (the "Transaction"). This
Transaction is expected to take the form of an all cash tender offer, followed
by a merger of Treadco Acquisition Corp. and the Company. The terms and
conditions of the Transaction are more fully set forth in the definitive merger
agreement.
 
     You have requested our opinion as to the fairness to the disinterested
stockholders of the Company from a financial point of view of the consideration
to be received by such stockholders in the Transaction. For purposes of the
opinion, the term "disinterested shareholders" means holders of the Company's
one class of publicly-traded common stock other than (1) directors, officers and
employees of the Company, (2) any holder of 10% percent or more of the
outstanding shares of such class, and (3) ABC or any affiliates thereof. In
connection with rendering our opinion we have:
 
          (i) analyzed certain publicly available financial statements and
     reports regarding the Company;
 
          (ii) analyzed certain internal financial statements and other
     financial and operating data (including financial projections) concerning
     the Company prepared by management of the Company;
 
          (iii) reviewed the reported prices and trading activity for the Common
     stock;
 
          (iv) compared the financial performance of the Company and the prices
     and trading activity of the Common Stock with that of certain other
     comparable publicly-traded companies and their securities;
 
          (v) reviewed the financial terms, to the extent publicly available, of
     certain comparable transactions;
 
          (vi) reviewed the definitive merger agreement and related documents;
 
          (vii) discussed with management of the Company and Arkansas Best
     Corporation ("the Parent") the operations of and future business prospects
     for the Company;
 
          (viii) assisted in your deliberations regarding the material terms of
     the Transaction, and
 
          (ix) performed such other analyses and provided such other services as
     we have deemed appropriate.
 
     We have relied on the accuracy and completeness of the information and
financial data provided to us by the Company and Parent, and our opinion is
based upon such information. We have inquired into the reliability of such
information and financial data only to the limited extent necessary to provide a
reasonable basis for our opinion, recognizing that we are rendering only an
informed opinion and not an appraisal or certification of value. With respect to
financial forecasts and other information provided to or otherwise reviewed by
or discussed with us, the management of the Company has advised us that such
forecasts and
 
                                       A-1
<PAGE>   45
March 15, 1999
Page 2
 
other information were reasonably prepared on bases reflecting the best
currently available estimates and judgments of the management of the Company as
to the future financial performance of the Company.
 
     As part of our investment banking business, we regularly issue fairness
opinions and are continually engaged in the valuation of companies and their
securities in connection with business reorganizations, private placements,
negotiated underwritings, mergers and acquisitions and valuations for estate,
corporate and other purposes. In the ordinary course of business, Stephens Inc.
and its affiliates at any time may hold long or short positions, and may trade
or otherwise effect transactions as principal or for the accounts of customers,
in debt or equity securities or options on securities of the Company. Stephens
is receiving a fee, and reimbursement of its expenses, in connection with the
issuance of this fairness opinion and for its role as financial advisor to the
Company.
 
     Based on the foregoing and our general experience as investment bankers,
and subject to the qualifications stated herein, we are of the opinion on the
date hereof that the consideration to be received by the disinterested
shareholders of the Company in the Transaction is fair to them from a financial
point of view.
 
     This opinion and a summary discussion of our underlying analyses and role
as your financial advisor may be included in communications to the Company's
shareholders provided that we approve of such disclosures prior to publication.
 
                                            Very truly yours,

                                            /s/ STEPHENS INC.
 
                                            STEPHENS, INC.
 
                                       A-2
<PAGE>   46
 
                                                                         ANNEX B
 
                          AGREEMENT AND PLAN OF MERGER
 
                                  BY AND AMONG
                           ARKANSAS BEST CORPORATION,
 
                        TREADCO ACQUISITION CORPORATION,
 
                                      AND
 
                                 TREADCO, INC.
 
                                 MARCH 15, 1999
 
                                       B-1
<PAGE>   47
 
                          AGREEMENT AND PLAN OF MERGER
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                              PAGE
                                                                              ----
<S>       <C>   <C>                                                           <C>
RECITALS....................................................................    1
 
ARTICLE   I     The Tender Offer
          1.1   The Tender Offer............................................    1
          1.2   Company Actions.............................................    3
 
ARTICLE   II    The Merger
          2.1   The Merger..................................................    3
          2.2   Effective Time..............................................    3
          2.3   Effects of the Merger.......................................    4
          2.4   Certificate of Incorporation................................    4
          2.5   Bylaws......................................................    4
          2.6   Directors...................................................    4
          2.7   Officers....................................................    4
          2.8   Conversion of the Shares....................................    4
          2.9   Dissenting Shares...........................................    4
          2.10  Conversion of the Common Stock of Newco.....................    5
          2.11  Payment for Shares..........................................    5
          2.12  Closing.....................................................    6
 
ARTICLE   III   Representations and Warranties of the Company
          3.1   Organization and Qualification..............................    6
          3.2   Authorized Capital..........................................    6
          3.3   Corporate Authorization.....................................    6
          3.4   Approvals; No Violations....................................    7
          3.5   SEC Filings; Financial Statements...........................    7
          3.6   Absence of Undisclosed Liabilities..........................    7
          3.7   Finders and Investment Bankers..............................    7
 
ARTICLE   IV    Representations and Warranties of Parent and Newco
          4.1   Organization and Qualification..............................    8
          4.2   Corporate Authorization.....................................    8
          4.3   Approvals; No Violations....................................    8
          4.4   No Prior Activities.........................................    8
          4.5   Information Supplied........................................    9
          4.6   Financing...................................................    9
          4.7   Company Reports.............................................    9
          4.8   Company Compliance..........................................    9
 
ARTICLE   V     Covenants
          5.1   Conduct of Business of the Company..........................    9
          5.2   Proxy Statement.............................................   11
          5.3   Action of Stockholders of the Company; Voting and
                Disposition of the Shares...................................   11
          5.4   Additional Agreements.......................................   12
          5.5   Notification of Certain Matters.............................   12
          5.6   Access to Information.......................................   12
          5.7   Public Announcements........................................   13
          5.8   Officers' and Directors' Indemnification....................   13
          5.9   Employee Options; Performance Award Units...................   13
          5.10  Other Actions by the Company................................   14
</TABLE>
 
                                       (i)
<PAGE>   48
 
<TABLE>
<CAPTION>
                                                                              PAGE
                                                                              ----
<S>       <C>   <C>                                                           <C>
ARTICLE   VI    Conditions to Consummation of the Merger
          6.1   Stockholder Approval........................................   14
          6.2   No Injunction...............................................   14
          6.3   Offer.......................................................   14
          6.4   Governmental Consents.......................................   14
 
ARTICLE   VII   Termination; Amendment; Waiver
          7.1   Termination.................................................   14
          7.2   Effect of Termination.......................................   15
          7.3   Fees and Expenses...........................................   15
          7.4   Amendment...................................................   16
          7.5   Waiver......................................................   16
 
ARTICLE   VIII  Miscellaneous
          8.1   Survival of Representations, Warranties, and Agreements.....   16
          8.2   Brokerage Fees and Commissions..............................   16
          8.3   Entire Agreement; Assignment................................   16
          8.4   Severability................................................   17
          8.5   Notices.....................................................   17
          8.6   Governing Law...............................................   18
          8.7   Specific Performance........................................   18
          8.8   Other Potential Bidders.....................................   18
          8.9   Descriptive Headings; References............................   18
          8.10  Parties in Interest.........................................   18
          8.11  Beneficiaries...............................................   18
          8.12  Counterparts................................................   18
          8.13  Obligations.................................................   19
          8.14  Certain Definitions.........................................   19
</TABLE>
 
Annex A  Certain Conditions
 
Schedules
 
                                      (ii)
<PAGE>   49
 
                          AGREEMENT AND PLAN OF MERGER
 
     AGREEMENT AND PLAN OF MERGER (the "Agreement") dated as of March 15, 1999,
by and among ARKANSAS BEST CORPORATION, a Delaware corporation ("Parent"),
TREADCO ACQUISITION CORPORATION, a Delaware corporation and a wholly-owned
subsidiary of Parent ("Newco"), and TREADCO, INC., a Delaware corporation (the
"Company").
 
                                    RECITALS
 
     The Board of Directors of the Company (the "Board"), upon the
recommendation of a duly authorized special committee thereof (consisting of
independent directors) (the "Special Committee") and the Board of Directors of
Parent have unanimously determined that it is in the best interests of the
stockholders of their respective corporations for Parent to acquire all the
outstanding shares of common stock, par value $.01 per share, of the Company
(including the associated Rights (as defined in Section 1.1(a) of this
Agreement)) (collectively, the "Shares") other than those Shares owned by Parent
or any of its subsidiaries.
 
     The parties intend to effect such acquisition through a tender offer on the
terms described below, followed by a merger of Newco with and into the Company
on the terms described below (the "Merger").
 
     THEREFORE, in consideration of the foregoing, the mutual covenants
contained in this Agreement, and other good and valuable consideration, the
receipt and sufficiency of which all parties hereby acknowledge, the parties
agree as follows:
 
                                   ARTICLE I
 
                                THE TENDER OFFER
 
     1.1  The Tender Offer. (a) Provided that this Agreement has not been
terminated in accordance with Article VII and none of the events referred to in
Annex A (other than the events referred to in clauses (i) through (ii) of the
second paragraph of Annex A and paragraph clause (i) of Annex A) has occurred or
is existing, within five business days of the date of this Agreement, Parent
will commence a tender offer (the "Offer") subject to Rules 13e-3 and 14d-1 of
the Securities Exchange Act of 1934, as amended (the "Exchange Act") for all
outstanding Shares at a price of $9.00 per Share (the "Per Share Amount") net to
the seller in cash. Parent agrees to accept for payment all Shares validly
tendered pursuant to the Offer as soon as legally permissible, and to pay for
all such Shares as promptly as practicable, in each case upon the terms and
subject to the conditions of the Offer, as it may be revised as permitted by
this Agreement. The obligation of Parent to commence the Offer will be subject
only to the conditions set forth in Annex A, and the obligation of Parent to
accept for payment, purchase, and pay for the Shares tendered pursuant to the
Offer will be subject to such conditions and to the further condition that the
Shares validly tendered and not withdrawn prior to the expiration date of the
Offer when aggregated with the Shares currently owned by Parent, its
subsidiaries and affiliates (other than affiliates who are natural persons)
represent not less than 66 2/3% of the number of Shares then outstanding and
issuable on the exercise of the outstanding options (the "Minimum Condition").
Parent specifically reserves the right to extend the expiration date of the
Offer (unless, after April 30, 1999, all conditions to the Offer listed on Annex
A are fulfilled or waived by Parent and Newco), and to make any other changes in
the terms and conditions of the Offer (provided that, unless previously approved
by the Company (as recommended by the Special Committee) in writing, no change
may be made that decreases the price per Share payable in the Offer, that
changes the form of consideration to be paid in the Offer, that reduces the
maximum number of Shares to be purchased in the Offer, that waives or reduces,
in whole or in part, the Minimum Condition, that imposes conditions to the Offer
in addition to those set forth in Annex A, or that broadens the scope of such
conditions or amends any other material term of the Offer in a manner adverse to
the Company's stockholders (other than Parent). Notwithstanding the foregoing,
Parent (i) shall extend the Offer for any period required by any rule,
regulation or interpretation of the Securities and Exchange Commission (the
"SEC") or the staff thereof applicable to the Offer, and (ii) may, without the
consent of the Company, extend the Offer for an aggregate period of not more
than 10 business days beyond the latest applicable date that would otherwise be
permitted under clause (i) of this sentence if, as of such
                                        1
<PAGE>   50
 
date, all of the offer conditions set forth on Annex A are satisfied or waived
by Parent, but the number of Shares validly tendered and not withdrawn pursuant
to the Offer is less than 90% of the then outstanding Shares on a fully diluted
basis. The parties agree that the conditions set forth in Annex A are for the
sole benefit of Parent and may be asserted by Parent or may be waived by Parent,
in whole or in part, at any time and from time to time, in its sole discretion
other than the Minimum Condition which requires the written consent of the
Company (as recommended by the Special Committee). The failure by Parent at any
time to exercise any of the foregoing rights will not be deemed a waiver of any
such right, the waiver of any such right with respect to particular facts and
circumstances will not be deemed a waiver with respect to other facts or
circumstances, and each such right will be deemed an ongoing right that may be
asserted at any time and from time to time. The Per Share Amount will be paid
net to the seller in cash, less any required withholding taxes, on the terms and
subject to the conditions of the Offer. Parent and the Company agree that no
Shares held by the Company or by Parent or any of its subsidiaries will be
tendered in the Offer. The Company hereby consents to the Offer and represents
that: (a) the Special Committee at a meeting duly called and held (i) determined
at such time that the Offer and the Merger, taken together, are fair to the
Company and its stockholders and in the best interests of the holders of the
Shares (other than Parent, its subsidiaries and affiliates (other than those
affiliates who are natural persons)); and (ii) resolved at such time to
recommend acceptance of the Offer and approval and adoption of this Agreement,
the Merger, and the transactions contemplated by this Agreement to the Board,
(b) the Board at a meeting duly called and held (i) determined at such time that
the Offer and the Merger, taken together, are fair to the Company and its
stockholders and in the best interests of the holders of the Shares (other than
Parent, its subsidiaries and affiliates (other than those affiliates who are
natural persons)); (ii) resolved at such time to recommend acceptance of the
Offer and approval and adoption of this Agreement, the Merger, and the
transactions contemplated by this Agreement to the stockholders of the Company;
and (iii) has taken all necessary action with respect to the rights to purchase
shares of common stock, $.01 par value per share, of the Company at $60.00 per
share (the "Rights") issued under the Company's Rights Agreement, dated as of
September 1, 1991 between the Company and NCNB Texas National Bank (as amended,
the "Rights Agreement"), to provide that the Offer will not constitute an event
resulting in a "Distribution Date" (as such term is defined in the Rights
Agreement) and (c) Stephens Inc., the Special Committee's financial advisor (the
"Advisor"), has delivered to the Special Committee and the Board its opinion
that, subject to the limitations and qualifications set forth in such opinion,
the Per Share Amount is fair from a financial point of view to the holders of
the Shares (other than Parent).
 
     (b) As promptly as practicable on the date of the commencement of the
Offer, Parent will file with the SEC a Tender Offer Statement on Schedule 13E-3
and 14D-1 with respect to the Offer under the Exchange Act, which will (i)
reflect the execution and delivery of this Agreement; (ii) set forth the Offer
as provided for in this Agreement pursuant to an offer to purchase; and (iii)
contain or incorporate by reference a form of letter of transmittal. Parent
represents and agrees that the Tender Offer Statement on Schedule 13E-3 and
14D-1 and all other Offer Documents (as defined below) shall comply as to form
in all material respects with the Exchange Act, and the rules and regulations
promulgated thereunder, and that the Tender Offer Statement on Schedule 13E-3
and 14D-1 and all other Offer Documents, on the date first published,
disseminated, or mailed to the Company's stockholders, shall not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary in order to make the statements therein not
misleading. Parent agrees promptly to take all steps necessary to cause the
Tender Offer Statement on Schedule 13E-3 and 14D-1 and all other Offer Documents
to be corrected if and to the extent that such information shall become false or
misleading in any material respect, and Parent agrees to take all steps
necessary to amend or supplement the Tender Offer Statement on Schedule 13E-3
and 14D-1 and all other Offer Documents and to cause such documents as so
amended or supplemented to be filed with the SEC and to be disseminated to the
Company's stockholders, in each case as and to the extent required by the
federal securities laws. The Company, the Special Committee and its advisors
shall be given a reasonable opportunity to review the Tender Offer Statement on
Schedule 13E-3 and 14D-1, all other Offer Documents and all amendments and
supplements thereto prior to the filing with the SEC or dissemination to the
Company's stockholders.
 
                                        2
<PAGE>   51
 
     (c) Parent will promptly disseminate the offer to purchase referred to in
Section 1.1(b) (as amended pursuant to this Agreement, the "Offer to Purchase"
and, collectively with all other schedules and exhibits required to be filed
with the SEC, the "Offer Documents") to the holders of the Shares, reflecting
the terms set forth in this Agreement. The Offer Documents will contain the
recommendation of the Special Committee and the Board that the holders of the
Shares accept the Offer as described in Section 1.1(a) and may make reference to
the opinion of the Advisor referred to in Section 1.1(a) and include or
incorporate such opinion. The Company, with respect to written information
supplied by the Company specifically for use in the Offer Documents or based
upon information pertaining to the Company in the Company Reports (as defined in
Section 3.5), agrees promptly to inform Parent in the event that any such
information in the Offer Documents becomes false or misleading in any material
respect. Subject to Section 1.2(b), Parent agrees to take all steps to cause the
Offer Documents to be disseminated to the holders of Shares, as and to the
extent required by applicable law. Parent will promptly provide to the Company
any written comments it receives from the SEC with respect to the Offer
Documents.
 
     1.2  Company Actions. (a) The Company hereby agrees to file on the date the
Offer Documents are filed with the SEC and promptly mail to its stockholders, a
Solicitation/Recommendation Statement on Schedule 14D-9 (together with all
schedules, amendments, and supplements, the "Schedule 14D-9") containing the
recommendations of the Special Committee and the Board referred to in Section
1.1 and the opinion of the Advisor referred to in Section 1.1(a). The Company
will promptly provide to Parent any written comments it receives from the SEC
with respect to the Schedule 14D-9. The Schedule 14D-9, at the time it is first
published, disseminated, or mailed to the stockholders of the Company, will not
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein not misleading. The Company agrees promptly to take all steps necessary
to cause the Schedule 14D-9 to be corrected to the extent reasonably requested
by Parent to reflect any change in information concerning Parent, Newco, or the
Offer, and, as corrected, to be filed with the SEC and disseminated to the
stockholders of the Company, as and to the extent required by applicable law.
 
     (b) In connection with the Offer, the Company will promptly furnish, or
request its transfer agent to furnish, Parent with mailing labels, security
position listings, and any available listing or computer files containing the
names and addresses of the record holders of Shares as of the most recent
practicable date and will furnish Parent with such information and assistance
(including updated lists of security position listings and listing or computer
files) as Parent or its agents may reasonably request in order to communicate
the Offer to the record and beneficial holders of Shares. Subject to applicable
law and except for such steps as are necessary to disseminate the Offer
Documents, Parent and its affiliates will hold in confidence the information
contained in any such labels, listings, and files, will use such information
only in connection with the Offer and the Merger, and, if this Agreement is
terminated, will deliver to the Company all copies of such information in its
possession. Parent agrees to reimburse the Company for all expenses incurred by
it in complying with this Section 1.2(b).
 
                                   ARTICLE II
 
                                   THE MERGER
 
     2.1  The Merger. Upon the terms and subject to the conditions of this
Agreement and in accordance with the Delaware General Corporation Law (the
"DGCL"), Newco will be merged with and into the Company as soon as practicable
following the satisfaction or waiver of the conditions set forth in Article VI.
Following the Merger, the Company will continue as the surviving corporation
(the "Surviving Corporation") and the separate corporate existence of Newco will
cease. At the election of Parent, any one or more direct or indirect
wholly-owned subsidiaries of Parent incorporated under the laws of the State of
Delaware may be substituted for Newco as a constituent corporation in the
Merger. As used in this Agreement, the term "Newco" refers to any such
substituted corporation.
 
     2.2  Effective Time. The Merger will be consummated by filing with the
Delaware Secretary of State a certificate of merger or certificate of ownership
and merger in accordance with the DGCL (the "Certificate of Merger") in such
form as is required by, and executed in accordance with, the relevant provisions
of the
                                        3
<PAGE>   52
 
DGCL, and such other documents as may be required by the provisions of the DGCL.
The Merger will be effective at the time of such filing or at such later time as
is specified in the Certificate of Merger in accordance with the provisions of
the DGCL. Such time of effectiveness is referred to as the "Effective Time."
 
     2.3  Effects of the Merger. The Merger will have the effects set forth in
sec. 259 of the DGCL. As of the Effective Time, the Company will be a
wholly-owned direct or indirect subsidiary of Parent. Without limiting the
foregoing, at the Effective Time, all properties, rights, privileges, powers,
and franchises of the Company and Newco will vest in the Surviving Corporation
and all debts, liabilities, obligations, and duties of the Company and Newco
will become the debts, liabilities, obligations, and duties of the Surviving
Corporation.
 
     2.4  Certificate of Incorporation. The Certificate of Incorporation of the
Company as in effect at the Effective Time will be the Certificate of
Incorporation of the Surviving Corporation until amended in accordance with
applicable law, except that at the election of Parent, the Company will amend
its Certificate of Incorporation at the Effective Time to conform as nearly as
possible to the Certificate of Incorporation of Newco.
 
     2.5  Bylaws. The Bylaws of the Company as in effect immediately prior to
the Effective Time will be the Bylaws of the Surviving Corporation until amended
in accordance with applicable law, except that at the election of Parent, the
Company will amend its Bylaws immediately prior to the Effective Time to conform
as nearly as possible to the Bylaws of Newco.
 
     2.6  Directors. The directors of Newco at the Effective Time and John R.
Meyers will be the initial directors of the Surviving Corporation and will hold
office from the Effective Time until their respective successors are duly
elected or appointed and qualified.
 
     2.7  Officers. The officers of the Company at the Effective Time will be
the initial officers of the Surviving Corporation and will hold office from the
Effective Time until their respective successors are duly elected or appointed
and qualified.
 
     2.8  Conversion of the Shares. At the Effective Time:
 
     (a) Each Share issued and outstanding immediately prior to the Effective
Time (other than (i) Shares held by Parent, the Company, or any direct or
indirect subsidiary of Parent and (ii) any Dissenting Shares (as defined in
Section 2.9)) will, without further action by Parent or the Company,
automatically be canceled and extinguished and converted into the right to
receive in cash the Per Share Amount (the "Merger Consideration") without
interest, less any required withholding taxes, upon surrender of the certificate
formerly representing such Share in accordance with Section 2.11.
 
     (b) Each Share issued and outstanding immediately prior to the Effective
Time that is owned or held by the Company will be canceled and retired and cease
to exist, without any conversion, and no payment will be made with respect to
any such Share.
 
     (c) Each Share issued and outstanding immediately prior to the Effective
Time that is owned or held by Parent or any direct or indirect subsidiary of
Parent (other than the Company) will remain issued and outstanding.
 
     2.9  Dissenting Shares. (a) Notwithstanding anything in this Agreement to
the contrary, Shares that are issued and outstanding immediately prior to the
Effective Time and that are held by stockholders that have complied in all
respects with the requirements of the DGCL concerning the right of a stockholder
of the Company to dissent from the Merger and to require an appraisal of such
Shares in the manner provided in the DGCL, if applicable, and that, as of the
Effective Time, have not effectively withdrawn or lost such right to appraisal
(the "Dissenting Shares") will not be converted into or represent a right to
receive the Merger Consideration pursuant to Section 2.8, but the holders of
such Dissenting Shares will be entitled only to such rights as are granted under
sec. 262 of the DGCL. Each holder of Dissenting Shares that becomes entitled to
payment for such Shares pursuant to such section of the DGCL will receive
payment for such Dissenting Shares from the Surviving Corporation in accordance
with the DGCL; provided, however, that to the extent that any holder or holders
of Shares have failed to establish the entitlement to appraisal rights as
provided in
                                        4
<PAGE>   53
 
sec. 262 of the DGCL, such holder or holders (as the case may be) will forfeit
the right to appraisal of such Shares and each such Share will thereupon be
deemed to have been converted, as of the Effective Time, into and represent the
right to receive payment from the Surviving Corporation of the Merger
Consideration, without interest, as provided in Section 2.8.
 
     (b) The Company will give Parent (i) prompt notice of any written demands
for appraisal, withdrawals of demands for appraisal, and any other instrument
served pursuant to sec. 262 of the DGCL received by the Company and (ii) the
opportunity to direct all negotiations and proceedings with respect to demands
for appraisal under sec. 262 of the DGCL. The Company will not, except with the
express written consent of Parent, voluntarily make any payment with respect to
any demands for appraisal or settle or offer to settle any such demands.
 
     2.10  Conversion of the Common Stock of Newco. Each share of the common
stock of Newco issued and outstanding immediately prior to the Effective Time
will be canceled and retired and cease to exist, without any conversion, and no
payment will be made with respect to any such Share.
 
     2.11  Payment for Shares. (a) Prior to the Effective Time, Parent will
appoint a bank or trust company reasonably acceptable to the Company as agent
for the holders of Shares (the "Paying Agent") to receive and disburse the cash
to which holders of Shares become entitled pursuant to Section 2.8. At the
Effective Time, Parent will provide the Paying Agent with sufficient cash to
allow the Merger Consideration to be paid by the Paying Agent for each Share
then entitled to receive the Merger Consideration (the "Payment Fund").
 
     (b) Promptly after the Effective Time, Parent will cause the Paying Agent
to mail to each record holder immediately prior to the Effective Time of an
outstanding certificate or certificates representing Shares that as of the
Effective Time represent the right to receive the Merger Consideration (the
"Certificates"), a form of letter of transmittal (which will specify that
delivery will be effected, and risk of loss and title to the Certificates will
pass, only upon proper delivery of the Certificates to the Paying Agent) and
instructions for use in effecting the surrender of the Certificates for payment.
Upon surrender to the Paying Agent of a Certificate, together with such letter
of transmittal duly executed and completed in accordance with its instructions
and such other documents as may be requested, the holder of such Certificate
will be entitled to receive in exchange for such Certificate, subject to any
required withholding of taxes, the Merger Consideration and such Certificate
will forthwith be canceled. No interest will be paid or accrued on the Merger
Consideration upon the surrender of the Certificates. If payment or delivery is
to be made to a person other than the person in whose name the Certificate
surrendered is registered, it will be a condition of payment or delivery that
the Certificate so surrendered be properly endorsed, with signature properly
guaranteed, or otherwise be in proper form for transfer and that the person
requesting such payment or delivery pay any transfer or other taxes required by
reason of the payment or delivery to a person other than the registered holder
of the Certificate surrendered or establish to the satisfaction of the Surviving
Corporation that such tax has been paid or is not applicable. Until surrendered
in accordance with the provisions of this Section 2.11, each Certificate (other
than Certificates held by persons referred to in Section 2.8(a)(i) and (ii))
will represent for all purposes only the right to receive the Merger
Consideration, without interest and subject to any required withholding of
taxes. Notwithstanding the foregoing, neither the Paying Agent nor any party to
this Agreement will be liable to a holder of Shares for any Merger Consideration
delivered to a public official pursuant to applicable abandoned property,
escheat, or similar laws.
 
     (c) Promptly following the date that is six months after the Effective
Time, the Paying Agent will return to the Surviving Corporation all cash,
certificates, and other property in its possession that constitute any portion
of the Payment Fund, and the duties of the Paying Agent will terminate.
Thereafter, each holder of a Certificate formerly representing a Share may
surrender such Certificate to the Surviving Corporation and (subject to
applicable abandoned property, escheat, and similar laws) receive in exchange
therefor the Merger Consideration without any interest. Neither Parent, Newco,
nor the Surviving Corporation will be liable to any holder of Shares for any
amount paid to a public official pursuant to applicable abandoned property,
escheat, or similar laws. If Certificates are not surrendered prior to midnight
on the second anniversary of the Effective Time, unclaimed amounts of the
Payment Fund will, to the extent permitted under applicable law, become the
property of the Surviving Corporation. Notwithstanding the foregoing, the
Surviving Corporation will be
 
                                        5
<PAGE>   54
 
entitled to receive from time to time all interest or other amounts earned with
respect to the Payment Fund as such amounts accrue or become available.
 
     (d) Any portion of the Payment Fund for which rights to dissent have been
perfected will be returned to the Surviving Corporation upon demand.
 
     (e) After the Effective Time there will be no registration of transfers on
the stock transfer books of the Surviving Corporation of the Shares that were
outstanding immediately prior to the Effective Time.
 
     2.12  Closing. Upon the terms and subject to the conditions of this
Agreement, as soon as practicable after all the conditions to the obligations of
the parties to effect the Merger under Article VI have been satisfied or waived,
the Company and Newco will (a) file with the Secretary of State of Delaware the
Certificate of Merger and (b) take all such other and further actions as may be
required by law to make the Merger effective. Contemporaneous with the filing
referred to in this Section 2.12, a closing (the "Closing") will be held at the
offices of Hughes & Luce, L.L.P., 1717 Main Street, Suite 2800, Dallas, Texas or
at such other location as the parties to this Agreement may establish for the
purpose of confirming all the foregoing. The date and the time of such Closing
are referred to as the "Closing Date."
 
                                  ARTICLE III
 
                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY
 
     The Company represents and warrants to Parent and Newco that:
 
     3.1  Organization and Qualification. The Company is a corporation duly
organized, validly existing, and in good standing under the laws of the State of
Delaware and has the requisite corporate power and authority and any necessary
governmental authority to own, operate, and lease its properties and assets and
to carry on its business as it is now being conducted, except for failures to
have such power and authority as would not have a Company Material Adverse
Effect (as defined below). The Company is duly qualified or licensed to do
business and is in good standing in each jurisdiction where the character of its
properties owned or leased or the nature of its activities makes such
qualification or licensing necessary, except for failures to be so qualified or
licensed and in good standing as would not have a Company Material Adverse
Effect. The Company does not beneficially own any equity interest in any entity,
and the Company is not a party to any joint venture, partnership, or similar
arrangement. For the purposes of this Agreement, "Company Material Adverse
Effect" means any change or effect that, individually or when taken together
with all such other changes or effects, would be materially adverse to the
condition (financial or other), business, operations, properties, assets,
liabilities, prospects, or results of operations of the Company.
 
     3.2  Authorized Capital. The authorized capital stock of the Company
consists solely of 18,000,000 shares of common stock, par value $.01 per share,
of which 5,072,255 shares were outstanding as of February 28, 1999, and
2,000,000 shares of preferred stock, $.01 par value per share, of which no
shares were outstanding as of February 28, 1999. All of the outstanding Shares
have been duly authorized and are validly issued, fully paid, nonassessable, and
free of preemptive rights. Schedule 3.2 lists each outstanding stock option of
the Company (the "Employee Options"), the number of shares covered by such
Employee Options, the exercise prices, and the exercise dates. Except for the
Rights, as set forth above or on Schedule 3.2, there are no preemptive rights
nor any outstanding subscriptions, options, warrants, rights, convertible
securities, or other agreements or commitments of any character relating to the
issued or unissued capital stock or other securities of the Company.
 
     3.3  Corporate Authorization. The Company has the full corporate power and
authority to execute and deliver this Agreement and, subject to any necessary
stockholder approval of the Merger, to consummate the transactions contemplated
by this Agreement. The execution, delivery, and performance by the Company of
this Agreement and the consummation by the Company of the Merger and the other
transactions contemplated by this Agreement have been duly and validly
authorized by all necessary corporate action and, except for any required
approval of the Merger and any adoption of this Agreement by the stockholders of
the Company in connection with the consummation of the Merger, no other
corporate proceedings on the part of
 
                                        6
<PAGE>   55
 
the Company are necessary to authorize this Agreement or to consummate the
transactions contemplated by this Agreement. This Agreement has been duly and
validly executed and delivered by the Company and constitutes a valid and
binding obligation of the Company, enforceable against the Company in accordance
with its terms.
 
     3.4  Approvals; No Violations. Except for applicable requirements of the
Exchange Act and the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the
"HSR Act") and the filing of the Certificate of Merger as required by the DGCL,
no filing with, and no permit, authorization, consent, or approval of, any
foreign or domestic public body or authority is necessary for the consummation
by the Company of the transactions contemplated by this Agreement. Except as set
forth on Schedule 3.4, the execution and delivery of this Agreement by the
Company, the consummation by the Company of the transactions contemplated by
this Agreement and the compliance by the Company with any of the provisions of
this Agreement will not (a) conflict with or result in any breach of any
provision of the Certificate of Incorporation or Bylaws of the Company; (b)
result in a violation or breach of, or constitute (with or without notice or
lapse of time or both) a default (or give rise to any right of termination,
cancellation, or acceleration) under, any of the terms, conditions, or
provisions of any note, bond, mortgage, indenture, license, lease, contract,
agreement, or other instrument or obligation to which the Company is a party or
by which any of its properties or assets may be bound; or (c) violate any order,
writ, injunction, decree, statute, rule, or regulation applicable to the Company
or any of its properties or assets; except such violations, conflicts, breaches,
defaults, terminations, or accelerations referred to in subsections (b) and (c)
of this Section 3.4 as would not have a Company Material Adverse Effect or
materially adversely affect the ability of any party to perform its obligations
under this Agreement.
 
     3.5  SEC Filings; Financial Statements. Since December 31, 1995, the
Company has timely filed with the SEC all forms, reports, statements, and
documents required to be filed by it pursuant to the Securities Act of 1933, as
amended (the "Securities Act") and the rules and regulations promulgated
thereunder, and the Exchange Act, and the rules and regulations promulgated
thereunder (collectively, and including, when filed, the Schedule 14D-9, the
"Company Reports") and has otherwise complied in all material respects with the
requirements of the Securities Act and the Exchange Act. To the knowledge of the
Special Committee, as of their respective dates, the Company Reports did not and
will not contain any untrue statement of a material fact or omit to state a
material fact required to be stated therein or necessary to make the statements
made therein, in light of the circumstances under which they were or will be
made, not misleading. Each of the historical balance sheets as of its date
included in or incorporated by reference into the Company Reports and the
audited financial statements of the Company for the year ended December 31,
1998, a copy of which has been delivered to Parent (the "1998 Audit") and each
of the historical statements of operations, stockholders' equity, and cash flows
included in or incorporated by reference into the Company Reports and the 1998
Audit (including any related notes and schedules) fairly presents or will fairly
present the financial condition, results of operations, stockholders' equity,
and cash flows, as the case may be, of the Company for the periods set forth, in
each case in accordance with generally accepted accounting principles
consistently applied during the periods involved.
 
     3.6  Absence of Undisclosed Liabilities. To the knowledge of the Special
Committee, except as set forth in the 1998 Audit (or the notes thereto), the
Company does not have any liabilities or obligations of any nature, whether or
not accrued, contingent, or otherwise, that would be required to be included on
a balance sheet of the Company as of December 31, 1998 (or disclosed in the
notes thereto) prepared in accordance with generally accepted accounting
principles, and that would have a Company Material Adverse Effect. Since
December 31, 1998, the Company has conducted its businesses in a manner
consistent with past practices, and the Company has not become subject to any
liabilities or obligations that would be required to be included on a balance
sheet of the Company (or disclosed in notes) prepared in accordance with
generally accepted accounting principles and that would have a Company Material
Adverse Effect, other than liabilities or obligations incurred in the ordinary
course of business consistent with past practices or incurred in connection with
the Offer, this Agreement, or the Merger and disclosed in the Company Reports.
 
     3.7  Finders and Investment Bankers. Neither the Company nor any of its
officers or directors has employed any investment banker, business consultant,
financial advisor, broker or finder in connection with
                                        7
<PAGE>   56
 
the transactions contemplated by this Agreement, except for the Advisor, or
incurred any liability for any investment banking, business consultancy,
financial advisory, brokerage or finders' fees or commissions in connection with
the transactions contemplated hereby, except for fees payable to the Advisor (as
reflected in the agreement between such firm and the Company, a copy of which
has been delivered to Parent).
 
                                   ARTICLE IV
 
               REPRESENTATIONS AND WARRANTIES OF PARENT AND NEWCO
 
     Each of Parent and Newco represents and warrants to the Company as follows:
 
     4.1  Organization and Qualification. Each of Parent and Newco is a
corporation duly organized, validly existing, and in good standing under the
laws of the State of Delaware and has all requisite corporate power and
authority and any necessary governmental authority to carry on its business as
now conducted. Each of Parent and Newco is duly qualified or licensed to do
business, and is in good standing, in each jurisdiction where the character of
its properties owned or leased or the nature of its activities makes such
qualification or licensing necessary, except for failures to be so duly
qualified or licensed and in good standing as would not have a Parent Material
Adverse Effect. For the purposes of this Agreement, "Parent Material Adverse
Effect" means any change or effect that, individually or when taken together
with all such other changes or effects, would be materially adverse to the
condition (financial or other), business, operations, properties, assets,
liabilities, prospects, or results of operations of Parent and its subsidiaries,
taken as a whole.
 
     4.2  Corporate Authorization. Each of Parent and Newco has the full
corporate power and authority to execute and deliver this Agreement and to
consummate the transactions contemplated by this Agreement. The execution,
delivery, and performance by each of Parent and Newco of this Agreement and the
consummation by Parent and Newco of the Merger and of the other transactions
necessary for such consummation have been duly and validly authorized by Parent
as sole stockholder of Newco and by the Board of Directors of each of Parent and
Newco and no other corporate proceedings on the part of Parent or Newco are
necessary to authorize this Agreement or to consummate the transactions
contemplated by this Agreement. This Agreement has been duly and validly
executed and delivered by each of Parent and Newco and constitutes a valid and
binding obligation of each of Parent and Newco, enforceable in accordance with
its terms.
 
     4.3  Approvals; No Violations. Except for applicable requirements of the
Exchange Act and the HSR Act and the filing and recordation of the Certificate
of Merger as required by the DGCL, no filing with, and no permit, authorization,
consent, or approval of any foreign or domestic public body or authority is
necessary for the consummation by Parent and Newco of the transactions
contemplated by this Agreement. Except as set forth on Schedule 4.3, neither the
execution and delivery of this Agreement by Parent and Newco nor the
consummation by Parent and Newco of the transactions contemplated by this
Agreement nor compliance by them with any of the provisions of this Agreement
will (a) conflict with or result in any breach of any provision of the
organizational documents or bylaws of Parent or Newco; (b) result in a violation
or breach of, or constitute (with or without due notice or lapse of time or
both) a default (or give rise to any right of termination, cancellation, or
acceleration under), any of the terms, conditions, or provisions of any note,
bond, mortgage, indenture, license, lease, contract, agreement, or other
instrument or obligation to which Parent or Newco is a party or by which either
of them or any of their respective properties or assets may be bound; or (c)
violate any order, writ, injunction, decree, statute, rule, or regulation
applicable to Parent or Newco or any of their respective properties or assets;
except such violations, conflicts, breaches, defaults, terminations, or
accelerations referred to in subsections (b) or (c) of this Section 4.3 as would
not have a Parent Material Adverse Effect.
 
     4.4  No Prior Activities. Except for obligations or liabilities incurred in
connection with its incorporation or organization, the Offer, or the negotiation
and consummation of this Agreement and the transactions contemplated by this
Agreement, Newco has not incurred any obligations or liabilities, nor has it
engaged in any business or activities of any type or kind whatsoever or entered
into any agreements or arrangements with any person.
 
                                        8
<PAGE>   57
 
     4.5  Information Supplied. None of the information supplied or to be
supplied by Parent or Newco for inclusion or incorporation by reference in the
Offer Documents, the Schedule 13E-3 and 14D-1, or the Proxy Statement (as
defined below) will, in the case of the Offer Documents and the Schedule 13E-3
and 14D-1, at the respective times the Offer Documents and the Schedule 13E-3
and 14D-1 are filed with the SEC or first published, sent, or given to the
stockholders of the Company, or, in the case of the Proxy Statement, at the date
the Proxy Statement is first mailed to the stockholders of the Company or at the
time of the meeting of the stockholders of the Company held to vote on approval
and adoption of this Agreement and the Merger, contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they are made, not misleading. Parent and Newco agree
to promptly correct any information supplied by Parent or Newco for inclusion in
such documents that becomes false or misleading in any material respect. The
Offer Documents will comply as to form in all material respects with the
requirements of the Exchange Act and the rules and regulations promulgated
thereunder, except that no representation or warranty is made by Parent or Newco
with respect to statements made or incorporated by reference in the Offer
Documents based on information supplied by the Company for inclusion or
incorporation by reference in the Offer Documents.
 
     4.6  Financing. Parent intends to fund the aggregate purchase price for the
Shares from borrowings under its existing bank credit agreement. As of the date
hereof, Parent has taken all actions and satisfied all conditions necessary to
borrow the funds necessary to consummate the Offer and the Merger. Parent will
take all actions necessary to continue to have such funds available upon the
closing of the Offer or the Merger, as the case may be, and will avoid any
actions that would result in the unavailability of such funds.
 
     4.7  Company Reports.
 
     (a) To the knowledge of Parent, as of their respective dates, the Company
Reports did not contain any untrue statement of a material fact or omit to state
a material fact required to be stated therein or necessary to make the
statements made therein, in light of the circumstances under which they were
made, not misleading.
 
     (b) As of the date hereof, Parent has no knowledge of any discussions or
negotiations between it, the Company or any of their respective affiliates and
any other entity that would result in a Third Party Acquisition (as defined in
Section 7.3 hereof).
 
     4.8  Company Compliance. As of the date hereof, Parent knows of no event or
circumstance that would limit Company's compliance with its obligations
hereunder, including obligations of the Company contained in Section 5.
 
                                   ARTICLE V
 
                                   COVENANTS
 
     5.1  Conduct of Business of the Company.
 
     (a) Except as expressly contemplated by this Agreement, during the period
from the date of this Agreement to the Effective Time:
 
          (i) The Company will conduct its business solely in the ordinary
     course consistent with past practices.
 
          (ii) The Company will not intentionally take or willfully omit to take
     any actions that results in or would result in a Company Material Adverse
     Effect.
 
          (iii) The Company will use its reasonable best efforts to preserve
     intact the business organization of the Company, to keep available the
     services of its and their present officers and key employees and
     consultants, and to maintain satisfactory relationships with customers,
     agents, reinsurers, suppliers, and other persons having business
     relationships with the Company.
 
                                        9
<PAGE>   58
 
     (b) Without limiting the provisions of Section 5.1(a) or as otherwise
expressly provided in this Agreement, the Company will not, without Parent's
prior written consent, during the period from the date of this Agreement to the
Effective Time:
 
          (i) issue, sell, or dispose of additional shares of capital stock of
     any class (including the Shares) of the Company, or securities convertible
     into or exchangeable for any such shares or securities, or any rights,
     warrants, or options to acquire any such shares or securities, other than
     Shares issued upon exercise of options disclosed in Schedule 3.2, in each
     case in accordance with the terms disclosed on Schedule 3.2;
 
          (ii) redeem, purchase, or otherwise acquire, or propose to redeem,
     purchase, or otherwise acquire, any of its outstanding capital stock, or
     other securities of the Company;
 
          (iii) split, combine, subdivide, or reclassify any of its capital
     stock or declare, set aside, make, or pay any dividend or distribution on
     any shares of its capital stock;
 
          (iv) sell, pledge, dispose of, or encumber any of its assets, except
     for sales, pledges, dispositions, or encumbrances in the ordinary course of
     business consistent with past practices;
 
          (v) incur or modify any indebtedness or issue or sell any debt
     securities, or assume, guarantee, endorse, or otherwise as an accommodation
     become absolutely or contingently responsible for obligations of any other
     person, or make any loans or advances, other than in the ordinary course of
     business consistent with past practices;
 
          (vi) adopt or amend any bonus, profit sharing, compensation,
     severance, termination, stock option, pension, retirement, deferred
     compensation, employment or other employee benefit agreements, trusts,
     plans, funds, or other arrangements for the benefit or welfare of any
     director, officer, or employee, or (except for normal increases in the
     ordinary course of business that are consistent with past practices and
     that, in the aggregate, do not result in a material increase in benefits or
     compensation expense to the Company) increase in any manner the
     compensation or fringe benefits of any director, officer, or employee or
     pay any benefit not required by any existing plan or arrangement
     (including, without limitation, the granting or vesting of stock options or
     stock appreciation rights) or take any action or grant any benefit not
     expressly required under the terms of any existing agreements, trusts,
     plans, funds, or other such arrangements or enter into any contract,
     agreement, commitment, or arrangement to do any of the foregoing; or make
     or agree to make any payments to any directors, officers, agents,
     contractors, or employees relating to a change or potential change in
     control of the Company;
 
          (vii) acquire by merger, consolidation, or acquisition of stock or
     assets any corporation, partnership, or other business organization or
     division or make any investment either by purchase of stock or securities,
     contributions to capital, property transfer, or purchase of any material
     amount of property or assets, in any other person;
 
          (viii) except as required by this Agreement, adopt any amendments to
     its Certificate of Incorporation or Bylaws;
 
          (ix) take any action other than in the ordinary course of business and
     consistent with past practices, to pay, discharge, settle, or satisfy any
     claim, liability, or obligation (absolute or contingent, accrued or
     unaccrued, asserted or unasserted, or otherwise);
 
          (x) change any method of accounting or accounting practice used by the
     Company, except for any change required by reason of a concurrent change in
     generally accepted accounting principles;
 
          (xi) revalue in any respect any of its assets, including, without
     limitation, writing down the value of its portfolio or writing off notes or
     accounts receivable other than in the ordinary course of business
     consistent with past practices;
 
          (xii) authorize any unbudgeted capital expenditure or expenditures
     that, individually, is in excess of $300,000 or, in the aggregate, are in
     excess of $500,000;
 
                                       10
<PAGE>   59
 
          (xiii) make any tax election, settle or compromise any federal, state,
     or local tax liability or consent to the extension of time for the
     assessment or collection of any federal, state, or local tax;
 
          (xiv) settle or compromise any pending or threatened suit, action, or
     claim material to the Company or relevant to the transactions contemplated
     by this Agreement;
 
          (xv) enter into any agreement, arrangement, or understanding to do any
     of the foregoing actions in this Section 5.1, including any agreement,
     arrangement, or understanding resulting in or providing for a sale of any
     assets of the Company (other than a sale of assets in the ordinary course
     of business and consistent with past practices) or a merger or other
     liquidation, sale, or disposition of the Company; or
 
          (xvi) voluntarily take any action or willfully omit to take any action
     that would make any representation or warranty in Article III untrue or
     incorrect in any material respect at any time, including as of the date of
     this Agreement and as of the time of consummation of the Offer and the
     Effective Time, as if made as of such time.
 
Parent will not and will not permit any if its affiliates (other than the
Company) to take any action for the purpose of causing the Company to violate
any of the Company's obligations under this Agreement including its obligations
under this Section 5.1. The Parent will, and will cause each of its affiliates
(other than the Company), to take all action reasonably necessary to allow the
Company to comply with all its obligations in this Agreement, including the
obligations of the Company contained in this Section 5.1.
 
     5.2  Proxy Statement. Promptly after the execution of this Agreement, the
Company and Parent will cooperate with each other and use all reasonable efforts
to prepare, and the Company and Parent will file with the SEC, as soon as is
reasonably practicable after completion of the Offer, a proxy statement,
together with a form of proxy, or information statement, with respect to the
Special Meeting (as defined in Section 5.3), if such Special Meeting is required
to be held pursuant to Section 5.3. For the purposes of this Agreement, the term
"Proxy Statement" means such proxy or information statement filed in final form
with the SEC at the time it initially is mailed to the stockholders of the
Company and all amendments or supplements thereto, if any, similarly filed and
mailed. The parties will use all reasonable efforts to have the Proxy Statement
cleared by the SEC as promptly as practicable after filing and, as promptly as
practicable after the Proxy Statement has been so cleared, will mail the Proxy
Statement to the stockholders of the Company as of the record date for the
Special Meeting. The Company represents that none of the information provided or
to be provided by it, and Parent and Newco represent that none of the
information provided or to be provided by them, for use in the Proxy Statement
will, on the date the Proxy Statement is first mailed to the stockholders of the
Company and on the date of the Special Meeting, be false or misleading with
respect to any material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they are made, not misleading, and Parent, Newco,
and the Company each agrees to correct any information provided by it for use in
the Proxy Statement that has become false or misleading in any material respect
and file such amendments and supplements as are necessary. The Proxy Statement
will comply as to form in all material respects with all applicable requirements
of federal securities laws and applicable state laws.
 
     5.3  Action of Stockholders of the Company; Voting and Disposition of the
Shares.
 
     (a) Promptly after completion of the Offer and if required by applicable
law in order to consummate the Merger, the Company will take all action
necessary in accordance with the DGCL and the Certificate of Incorporation and
Bylaws of the Company, to call a meeting of its stockholders (the "Special
Meeting") with a record date as of which Parent is the record owner of the
Shares purchased pursuant to the Offer at which the stockholders of the Company
will consider and vote upon the Merger and this Agreement. Unless the fiduciary
duties of the Special Committee or the Board under applicable law require
otherwise, the Proxy Statement will contain the unanimous recommendation of the
Special Committee and the Board that the stockholders of the Company vote to
adopt and approve the Merger and this Agreement. The Company will, at the
request of Parent, use all reasonable efforts to obtain from its stockholders
proxies in favor of such adoption and approval and to take all other action
necessary, or, in the reasonable judgment of the Company and Parent, helpful to
secure the vote or consent of stockholders required by the DGCL to effect the
Merger.
                                       11
<PAGE>   60
 
Notwithstanding the foregoing, in the event that Parent determines to effect the
Merger without a meeting of the stockholders of the Company pursuant to sec. 228
or sec. 253 of the DGCL, the parties will take all necessary or appropriate
action to cause the Merger to become effective as soon as practicable after
expiration of the Offer without a meeting of stockholders, in accordance with
either such section of the DGCL.
 
     (b) At the Special Meeting, Parent, its subsidiaries and affiliates (other
than those affiliates who are natural persons) will vote, or cause to be voted
(other than those affiliates who are natural persons), all of the Shares (i)
then owned by any of them or (ii) as to which a proxy or power of attorney is
held by any of them in favor of the Merger.
 
     5.4  Additional Agreements. Subject to the terms and conditions of this
Agreement and to the fiduciary obligations of the Special Committee or the Board
under applicable law, each of the parties agrees to use their respective
reasonable best efforts to take, or cause to be taken, all actions to do, or
cause to be done, all things necessary, proper, or advisable to consummate and
make effective as promptly as practicable the transactions contemplated by this
Agreement (including consummation of the Offer and the Merger) and to cooperate
with each other in connection with the foregoing, including, without limitation,
using their respective reasonable best efforts (a) to obtain all necessary
waivers, consents, and approvals from other parties to loan agreements, leases,
and other contracts, (b) to obtain all necessary consents, approvals, and
authorizations as are required to be obtained under any federal, state, or
foreign law or regulations, (c) to lift or rescind any injunction or restraining
order or other order adversely affecting the ability of the parties to
consummate the transactions contemplated by this Agreement, (d) to prepare and
effect all necessary registrations and filings, and (e) to fulfill all
conditions to and covenants contained in this Agreement. If, after the Effective
Time, any action is necessary to effect the purposes of this Agreement, the
proper officers and directors of each party will take all such necessary action.
 
     5.5  Notification of Certain Matters. The Company will give prompt written
notice to Parent and Newco, and Parent and Newco will give prompt written notice
to the Company, of (a) the occurrence, or failure to occur, of any event, which
occurrence or failure would cause any representation or warranty contained in
this Agreement to be untrue or inaccurate in any material respect at any time,
(b) any material failure of the Company, Parent, or Newco, as the case may be,
or of any officer, director, employee, or agent of the Company, Parent, or
Newco, to comply with or satisfy any covenant, condition, or agreement to be
complied with or satisfied by it under this Agreement, (c) any act, omission to
act, event, or occurrence that, with notice, the passage of time, or otherwise,
would result in a Company Material Adverse Effect, and (d) any material
contingent liability of the Company for which it reasonably believes it will,
with the passage of time or otherwise, become liable. No such notification will
affect the representations or warranties of the parties or the conditions to the
obligations of the parties under this Agreement. Parent will promptly notify the
Company and the Advisor of (i) any information it obtains that would make the
representations and warranties contained in Section 4.7 untrue or inaccurate in
any material respect and (ii) any bona fide proposal received by Parent for a
Third Party Acquisition (as defined in Section 7.3 hereof).
 
     5.6  Access to Information.
 
     (a) From the date of this Agreement to the Effective Time, the Company
will, and will cause its officers, directors, employees, and agents upon
reasonable notice to, afford to officers, employees, and agents of Parent, Newco
and their affiliates and the banks, other financial institutions, and investment
bankers working with Parent or Newco, and their respective officers, employees,
and agents, complete access at all reasonable times to its officers, employees,
agents, properties, books, records, and contracts, and will furnish Parent,
Newco and their affiliates and the banks, other financial institutions, and
investments bankers working with Parent or Newco, all financial, operating, and
other data and information as they reasonably request.
 
     (b) Each of Parent and Newco will hold and will cause its directors,
officers, agents, employees, consultants, and advisors to hold in confidence,
unless compelled to disclose by judicial or administrative process or by other
requirements of law, all documents and information concerning the Company
furnished to such persons in connection with the transactions contemplated by
this Agreement (except to the extent that such information can be shown to have
been (i) previously known by such persons from sources other than the Company,
or its directors, officers, representatives, or affiliates, (ii) in the public
domain through no fault of
                                       12
<PAGE>   61
 
such persons, or (iii) later lawfully acquired by such persons on a
non-confidential basis from other sources who are not known by Parent or Newco
to be bound by a confidentiality agreement or otherwise prohibited from
transmitting the information to Parent or Newco by a contractual, legal, or
fiduciary obligation) and will not release or disclose such information to any
other person, except its directors, officers, agents, employees, consultants,
and advisors, in connection with this Agreement who need to know such
information. If the transactions contemplated by this Agreement are not
consummated, such confidence shall be maintained and, if requested by or on
behalf of the Company, Parent and Newco will, and will use all reasonable
efforts to cause their auditors, attorneys, financial advisors, and other
consultants, agents, and representatives to, return to the Company or destroy
all copies of written information furnished by the Company to Parent and Newco
or their agents, representatives, or advisors. It is understood that Parent and
Newco will be deemed to have satisfied their obligation to hold such information
confidential if they exercise the same care as they take to preserve
confidentiality for their own similar information.
 
     (c) No investigation pursuant to this Section 5.6 will affect any
representations or warranties of the parties in this Agreement or the conditions
to the obligations of the parties to this Agreement; provided, however, that the
Company shall not be deemed to have breached a representation or warranty herein
to the extent that such breach was known to Parent as of the date hereof.
 
     5.7  Public Announcements. Parent and Newco on the one hand and the Special
Committee on the other hand will consult with each other before issuing any
press release or otherwise making any public statements with respect to this
Agreement, the Offer, the Merger, or the other transactions contemplated by this
Agreement, and will not issue any such press release or make any such public
statement prior to such consultation, except as may be required by law or the
listing requirements of any securities exchange.
 
     5.8  Officers' and Directors' Indemnification.
 
     (a) Parent and Newco agree that all rights to indemnification now existing
in favor of the directors or officers of the Company as provided in the
Company's Certificate of Incorporation or Bylaws will, to the extent such rights
are in accordance with applicable law, survive the Merger and stay in effect in
accordance with their respective terms for a period of not less than six years
after the Effective Time.
 
     (b) In the event any action, suit, proceeding, or investigation relating to
this Agreement or to the transactions contemplated by this Agreement is
commenced by a third party, whether before or after the Effective Time, the
parties to this Agreement agree, subject to the fiduciary duties of the
respective Directors of the Company and Parent, to cooperate and use all
reasonable efforts to defend against and respond to such action, suit,
proceeding, or investigation.
 
     (c) For a period of six years after the Effective Time, Parent shall cause
the Surviving Corporation to maintain officers' and directors' liability
insurance for all persons currently covered under the Company's officers' and
directors' liability insurance policies, in their capacities as officers and
directors, on terms no less favorable to the covered persons than such existing
insurance; provided, however, that Parent shall not be required in order to
maintain or procure such coverage to pay an annual premium in excess of 150% of
the current annual premium paid by the Company for its existing coverage (the
"Cap"); and provided, further, that if equivalent coverage cannot be obtained,
or can be obtained only by paying an annual premium in excess of the Cap, Parent
shall only be required to obtain as much coverage as can be obtained by paying
an annual premium equal to the Cap.
 
     (d) If Parent or any of its successors or assigns (i) shall merge or
consolidate with or merge into any other corporation or entity and shall not be
the surviving or continuing corporation or entity of such consolidation or
merger or (ii) shall transfer all or substantially all of its properties and
assets to any individual, corporation or other entity, then in each such case,
proper provisions shall be made so that the successors or assigns of the Parent
shall assume all of the obligations set forth in this Section 5.8.
 
     5.9  Employee Options; Performance Award Units. The Company will cooperate
with Parent to terminate the 1991 Stock Option Plan and 1995 Performance Award
Program of the Company in accordance with their respective terms.
 
                                       13
<PAGE>   62
 
     5.10  Other Actions by the Company. If any "fair price," "moratorium,"
"control share acquisition," or other form of antitakeover statute, regulation,
charter provision, or contract is or becomes applicable to the transactions
contemplated by this Agreement, the Company will use its best efforts to grant
such approvals and take such actions as are necessary under such laws,
provisions, or contracts so that the transactions contemplated by this Agreement
may be consummated as promptly as practicable on the terms contemplated by this
Agreement and otherwise act to eliminate or minimize the effects of such
statute, regulation, provision or contract on the transactions contemplated by
this Agreement.
 
                                   ARTICLE VI
 
                    CONDITIONS TO CONSUMMATION OF THE MERGER
 
     The respective obligations of each party to effect the Merger are subject
to the satisfaction prior to the Effective Time of the following conditions:
 
     6.1  Stockholder Approval. This Agreement will have been adopted and
approved by the affirmative vote of the stockholders of the Company in
accordance with the Certificate of Incorporation and Bylaws of the Company and
with applicable law, unless no stockholder vote is required by law.
 
     6.2  No Injunction. No federal or state statute, rule, regulation,
injunction, decree, or order will be enacted, promulgated, entered, or enforced
that would (i) prohibit consummation of the Merger or of the other transactions
contemplated by this Agreement or (ii) impose any limitation on the ability of
Parent to exercise all rights of ownership with respect to the shares of Common
Stock it owns that will result in a Parent Material Adverse Effect; provided
that the parties to this Agreement agree to use their respective reasonable best
efforts to have any such injunction, decree, or order lifted.
 
     6.3  Offer. Parent will have purchased Shares pursuant to the Offer (except
that Parent in its sole discretion may waive conditions to the Offer).
 
     6.4  Governmental Consents. The waiting period applicable to the
consummation of the Merger under the HSR Act will have expired or been
terminated and all filings required to be made prior to the Effective Time with,
and all consents, approvals, permits, and authorizations required to be obtained
prior to the Effective Time from, governmental and regulatory authorities in
connection with the execution and delivery of this Agreement and the
consummation of the transactions contemplated by this Agreement will have been
made or obtained (as the case may be) except for such filings, consents,
approvals, permits and authorizations that the failure to make or obtain would
not result in a Company or Parent Material Adverse Effect.
 
                                  ARTICLE VII
 
                         TERMINATION; AMENDMENT; WAIVER
 
     7.1  Termination. This Agreement may be terminated and the Offer and the
Merger may be abandoned at any time prior to the Effective Time (notwithstanding
any approval by the stockholders of the Company of the Merger):
 
     (a) by mutual written consent of Parent, Newco, and the Company (upon
recommendation of the Special Committee);
 
     (b) by Parent and Newco or the Company if any court of competent
jurisdiction or other governmental body has issued a final order, decree, or
ruling or taken any other final action restraining, enjoining, or otherwise
prohibiting the Merger and such order, decree, ruling, or other action is or has
become nonappealable;
 
     (c) by Parent and Newco if due to an occurrence or circumstances that would
result in a failure to satisfy any conditions set forth in Annex A, Parent has
(i) failed to commence the Offer within five business days following the date of
the initial public announcement of the Offer, (ii) terminated the Offer, or
(iii) failed to pay for the Shares pursuant to the Offer by July 31, 1999;
 
                                       14
<PAGE>   63
 
     (d) by the Company if (i) there has not been a breach of any material
representation, warranty, covenant, or agreement on the part of the Company, and
Parent has (A) failed to commence the Offer within five business days following
the date of the initial public announcement of the Offer, (B) terminated the
Offer or (C) failed to pay for the Shares pursuant to the Offer by July 31, 1999
or (ii) prior to the purchase of Shares pursuant to the Offer, a person or group
has made a bona fide offer that the Special Committee or the Board by a majority
vote determines in its good faith judgment and in the exercise of its fiduciary
duties, after consultation with its financial and legal advisors, is more
favorable to the stockholders of the Company than the Offer and the Merger;
 
     (e) by Parent and Newco if prior to the purchase of Shares pursuant to the
Offer (i) there has been a breach (which breach is not cured or not capable of
being cured prior to the earlier of (A) 30 days following notice to the Company
by Parent of such breach or (B) two business days prior to the expiration date
of the Offer, as extended from time to time pursuant to the terms of this
Agreement) of any representation or warranty on the part of the Company having a
Company Material Adverse Effect or materially adversely affecting or delaying
the ability of Parent to consummate the Offer and the Merger, (ii) there has
been a breach (which breach is not cured or not capable of being cured prior to
the earlier of (A) 30 days following notice to the Company by Parent of such
breach or (B) two business days prior to the expiration date of the Offer, as
extended from time to time pursuant to the terms of this Agreement) of any
covenant or agreement on the part of the Company resulting in a Company Material
Adverse Effect or materially adversely affecting or delaying the ability of
Parent to consummate the Offer and the Merger, (iii) the Special Committee
engages in negotiations with any person or group (other than Parent or Newco)
that has proposed a Third Party Acquisition (as defined in Section 7.3) except
to the extent permitted by Section 8.8; (iv) the Company enters into an
agreement, letter of intent, or arrangement with respect to a Third Party
Acquisition, (v) the Special Committee or the Board has withdrawn or modified
(including by amendment of the Schedule 14D-9) in a manner adverse to Parent,
its approval or recommendation of the Offer, this Agreement, or the Merger or
has recommended another offer, or has adopted any resolution to effect any of
the foregoing, or (vi) the Minimum Condition has not been satisfied by the
expiration date of the Offer and on or prior to such date (A) any person or
group (other than Parent or Newco) has made and not withdrawn a public
announcement with respect to a Third Party Acquisition or (B) any person or
group (including the Company) other than Parent, its affiliates (other than the
Company) or Shapiro Capital Management Company, Inc. has become the beneficial
owner of 19.9% (except in bona fide arbitrage transactions) or more of the
Shares; or
 
     (f) by the Company if (i) there has been a breach of any representation or
warranty on the part of Parent or Newco that materially adversely affects (or
materially delays) the consummation of the Offer or the Merger or (ii) there has
been a material breach of any covenant or agreement on the part of Parent or
Newco that materially adversely affects (or materially delays) the consummation
of the Offer or the Merger.
 
     7.2  Effect of Termination. In the event of the termination and abandonment
of this Agreement pursuant to Section 7.1, this Agreement will become void and
have no effect, without any liability on the part of any party to this Agreement
or its affiliates, directors, officers, or stockholders, other than the
provisions of this Section 7.2 and Sections 5.6(b), 5.8, and 7.3. Nothing
contained in this Section 7.2 will relieve any party from liability for any
breach of this Agreement.
 
     7.3  Fees and Expenses.
 
     (a) If (i) Parent and Newco terminate this Agreement pursuant to Section
7.1(e)(v) or (ii) the Company (with the recommendation of the Special Committee)
terminates this Agreement pursuant to Section 7.1(d)(ii), then in either case
the Company will pay to Parent, within one business day following such
termination, a fee, in cash, of $675,000 (inclusive of any and all expenses
incurred by Parent, Newco and their affiliates in connection with the Offer and
the Merger and the consummation of the transactions contemplated by this
Agreement).
 
     For the purposes of this Agreement, "Third Party Acquisition" means the
occurrence of any of the following events (i) the acquisition of the Company by
merger or otherwise by any person or group other than Parent, Newco, or any
affiliate of Parent (other than the Company) or Shapiro Capital Management
Company, Inc. (a "Third Party"); (ii) the acquisition by a Third Party of more
than 19.9% of the total assets
                                       15
<PAGE>   64
 
of the Company; (iii) the acquisition by a Third Party of 19.9% or more of the
outstanding Shares from the Company or in a transaction or series of related
transactions that results in a change of control of the Company; (iv) the
adoption by the Company of a plan of liquidation or the declaration or payment
of an extraordinary dividend; or (v) the acquisition by the Company of more than
19.9% of the outstanding Shares.
 
     (b) Except as specifically provided in Section 1.2(b) or this Section 7.3,
each party will bear its own expenses in connection with this Agreement and the
transactions contemplated by this Agreement.
 
     7.4  Amendment. This Agreement may not be amended except in an instrument
in writing signed on behalf of all of the parties to this Agreement; provided,
however, that after approval of the Merger by the stockholders of the Company,
no amendment that would either decrease the Merger Consideration or change any
other term or condition of this Agreement, if any such change, alone or in the
aggregate, would materially and adversely affect the stockholders of the
Company, may be made without the further approval of the stockholders of the
Company; provided, further, that, after purchase of the Shares pursuant to the
Offer, no amendment may be made to Section 5.8 without the consent of the
indemnified persons.
 
     7.5  Waiver. At any time prior to the Effective Time, whether before or
after the Special Meeting, any party to this Agreement may (i) subject to the
proviso contained in Section 7.4, extend the time for the performance of any of
the obligations or other acts of any other party or parties to this Agreement,
(ii) subject to the proviso contained in Section 7.4 of this Agreement, waive
any inaccuracies in the representations and warranties contained in this
Agreement by any other applicable party or in any documents, certificate, or
writing delivered pursuant to this Agreement by any other applicable party, or
(iii) subject to the proviso contained in Section 7.4 of this Agreement, waive
compliance with any of the agreements of any other party or with any conditions
to its own obligations. Any agreement on the part of a party to this Agreement
to any such extension or waiver will be valid only if set forth in an instrument
in writing signed on behalf of such party by a duly authorized officer.
 
                                  ARTICLE VIII
 
                                 MISCELLANEOUS
 
     8.1  Survival of Representations, Warranties, and Agreements. The
representations and warranties made in this Agreement will not survive beyond
the Effective Time or the termination of this Agreement, as the case may be. No
investigation made, or information received by, any party to this Agreement will
affect any representation or warranty made by any other party to this Agreement.
The covenants and agreements of the parties to this Agreement will survive in
accordance with their terms.
 
     8.2  Brokerage Fees and Commissions. Except as disclosed in the Offer
Documents, the Company hereby represents and warrants to Parent with respect to
the Company, and Parent and Newco hereby represent and warrant to the Company
with respect to Parent or any of its subsidiaries that, no person is entitled to
receive from the Company, Parent, Newco or any of their subsidiaries, any
investment banking, brokerage, or finder's fee or fees in connection with this
Agreement or any of the transactions contemplated by this Agreement.
 
     8.3  Entire Agreement; Assignment. This Agreement, together with all the
Schedules and Annexes hereto, (a) constitutes the entire agreement between the
parties with respect to the subject matter of this Agreement and supersedes all
other prior written agreements and understandings and all prior and
contemporaneous oral agreements and understandings between the parties to this
Agreement or any of them with respect to the subject matter of this Agreement
and (b) will not be assigned by operation of law or otherwise, provided that
Parent may assign its rights and obligations under this Agreement, or those of
Newco, including, without limitation, the right to substitute in place of Newco
a subsidiary as one of the constituent corporations to the Merger as provided in
Section 2.1 to any direct or indirect subsidiary of Parent, but no such
assignment will relieve the assigning party of its obligations under this
Agreement. Any purported assignment of this Agreement not made in accordance
with this Section 8.3 will be null, void, and of no effect. No party to this
Agreement has relied upon any representation or warranty, oral or written, of
any other party to this
 
                                       16
<PAGE>   65
 
Agreement or any of their officers, directors, or stockholders except for the
representations and warranties contained in this Agreement.
 
     8.4  Severability. If any term or other provision of this Agreement is
invalid, illegal, or incapable of being enforced by any rule of law or public
policy, all other terms and provisions of this Agreement will nevertheless
remain in full force and effect. Upon any final judicial determination that any
term or other provision is invalid, illegal, or incapable of being enforced, the
parties to this Agreement will negotiate in good faith to modify this Agreement
so as to effect the original intent of the parties as closely as possible in an
acceptable manner to the end that the transactions contemplated by this
Agreement be consummated to the extent possible.
 
     8.5  Notices. All notices, requests, claims, demands and other
communications under this Agreement will be in writing and will be deemed to
have been duly given when delivered in person, by cable, telegram or telex,
facsimile or by registered or certified mail (postage prepaid, return receipt
requested) to the respective parties as follows:
 
     (a) if to Parent or Newco, to:
          Arkansas Best Corporation
          Treadco Acquisition Corporation
          3801 Old Greenwood Road
          Fort Smith, Arkansas 72903
          Attention: Richard F. Cooper
          Fax: (501) 785-6124
 
     with a copy to:
          Hughes & Luce, L.L.P.
          1717 Main Street, Suite 2800
          Dallas, Texas 75201
          Attention: Alan J. Bogdanow
          Fax: (214) 939-5849
 
     (b) if to the Company, to:
          Treadco, Inc.
          1101 South 21st Street
          Fort Smith, Arkansas 72901
          Attention: John R. Meyers
          Fax: (501) 788-6486
 
     with copies to:
          Special Committee of the Board of Directors
          Treadco, Inc.
          1101 South 21st Street
          Fort Smith, Arkansas 72901
          Attention: Robert B. Gilbert and Nicolas M. Georgitsis
          Fax: (501) 788-6486
 
     and
          Kutak Rock
          Suite 1100
          425 West Capitol Avenue
          Little Rock, Arkansas 72201-3409
          Attention: Richard N. Massey
          Fax: (501) 975-3001
 
or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above
(provided that notice of any change of address will be effective only upon
receipt).
                                       17
<PAGE>   66
 
     8.6  Governing Law. This Agreement will be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflict of laws.
 
     8.7  Specific Performance. Each of the parties to this Agreement
acknowledges and agrees that the other parties to this Agreement would be
irreparably damaged in the event any of the provisions of this Agreement were
not performed in accordance with their specific terms or were otherwise
breached. Accordingly, each of the parties to this Agreement agrees that each of
them will be entitled to an injunction or injunctions to prevent breaches of the
provisions of this Agreement and to enforce specifically this Agreement and the
terms and provisions of this Agreement in any action instituted in any court of
the United States or any state having subject matter jurisdiction, in addition
to any other remedy to which such party may be entitled, at law or in equity.
 
     8.8  Other Potential Bidders. The Company, its affiliates, and their
respective officers, directors, employees, representatives, and agents will
immediately cease any existing discussions or negotiations, if any, with any
person or group conducted heretofore with respect to any acquisition of all or
any material portion of the assets of, or any equity interest in, the Company or
any business combination with the Company. The Company may, directly or
indirectly, furnish information and access, in each case only in response to
unsolicited requests therefor, to any person or group made after the date of
this Agreement that was not encouraged, solicited, or initiated by the Company
or any of its affiliates, or their respective officers, directors, agents, or
representatives after the date of this Agreement, pursuant to appropriate
confidentiality agreements, and may participate in discussions and negotiate
with such person or group concerning any merger, sale of assets, sale of shares
of capital stock, or similar transaction involving the Company, if such person
or group has submitted a written proposal to the Special Committee or the Board
relating to any such transaction and failing to take such action would
constitute a breach of fiduciary duty under applicable law. The Special
Committee or the Board will provide a written copy of such proposal to Parent
immediately after receipt and will keep Parent promptly advised of any
development with respect to such matters. Except as set forth above, neither the
Company nor any of its affiliates, nor any of its or their respective officers,
directors, employees, representatives, or agents, will, directly or indirectly,
for the account of the Company or for their own account, encourage, solicit,
participate in, or initiate discussions or negotiations with, or provide any
information to, any person or group (other than Parent and Newco, any affiliate
of Parent and Newco, or any designees of Parent and Newco) concerning any
merger, sale of assets, sale of shares of capital stock, or similar transaction
involving the Company; provided, however, that nothing in this Agreement will
prevent the Board from taking, and disclosing to the stockholders of the
Company, a position contemplated by Rules 14d-9 and 14e-2 promulgated under the
Exchange Act with regard to any tender offer; provided, further, that the
Special Committee and the Board will not recommend that the stockholders of the
Company tender their Shares in connection with any such tender offer unless
failing to take such action would constitute a breach of fiduciary duty under
applicable law. The Company will not waive, or release any person from, any
provision of any confidentiality or standstill agreement to which the Company is
a party.
 
     8.9  Descriptive Headings; References. The descriptive headings in this
Agreement are inserted for convenience of reference only and are not intended to
be part of or to affect the meaning or interpretation of this Agreement.
References in this Agreement to Sections, Annexes, and Schedules are references
to the Sections, Annexes, and Schedules of this Agreement unless the context
indicates otherwise.
 
     8.10  Parties in Interest. This Agreement will be binding upon and inure
solely to the benefit of each party to this Agreement, and, except as provided
in Sections 5.8 and 8.11, nothing in this Agreement, express or implied, is
intended to confer upon any other person any rights or remedies of any nature
whatsoever under or by reason of this Agreement.
 
     8.11  Beneficiaries. Parent hereby acknowledges that Section 5.8 is
intended to benefit the indemnified parties referred to in Section 5.8, any of
whom will be entitled to enforce Section 5.8 against the Surviving Corporation
or the Company, as the case may be.
 
     8.12  Counterparts. This Agreement may be executed in any number of
counterparts, each of which will be deemed to be an original, but all of which
will constitute one and the same agreement.
                                       18
<PAGE>   67
 
     8.13  Obligations. Parent will perform or cause Newco to perform all of the
obligations of Newco under this Agreement, including consummation of the Merger,
in accordance with the terms of this Agreement.
 
     8.14  Certain Definitions. For the purposes of this Agreement: (a) the term
"subsidiary" means each person in which a person owns or controls, directly or
through one or more subsidiaries, 50 percent or more of the stock or other
interests having general voting power in the election of directors or persons
performing similar functions or more than 50% of the equity interests; (b) the
term "person" will be broadly construed to include any individual, corporation,
company, partnership, trust, joint stock company, association, or other private
or governmental entity; (c) the term "group" has the meaning given in
sec.13(d)(3) of the Exchange Act; (d) the term "affiliate" has the meaning given
in Rule 144(a)(1) under the Securities Act; (e) the term "business day" has the
meaning given in Rule 14d-1(c)(6) under the Exchange Act; and (f) the term
"knowledge" or "knows" or words of similar import mean (i) with respect to
Parent, the actual knowledge of its executive officers and its officers or
employees who are officers or directors of the Company, without inquiry or
investigation and (ii) with respect to the Special Committee or the Company, the
actual knowledge of the members of the Special Committee, without inquiry or
investigation.
 
     IN WITNESS WHEREOF, each of the parties to this Agreement has caused this
Agreement to be executed on its behalf by its duly authorized officers, all as
of the day and year first above written.
 
                                            ARKANSAS BEST CORPORATION
 
                                            By:  /s/ ROBERT A. YOUNG, III
                                              ----------------------------------
                                                     Robert A. Young, III
                                                      President and CEO
 
                                            TREADCO ACQUISITION CORPORATION
 
                                            By:  /s/ ROBERT A. YOUNG, III
                                              ----------------------------------
                                                     Robert A. Young, III
                                                           Chairman
 
                                            TREADCO, INC.
 
                                            By:     /s/ JOHN R. MEYERS
                                              ----------------------------------
                                                        John R. Meyers
                                                      President and CEO
 
                                       19
<PAGE>   68
 
                                    Annex A
 
     Terms used in this Annex A have the meanings ascribed to them in the
Agreement and Plan of Merger dated as of March 15, 1999 (the "Merger
Agreement").
 
     Notwithstanding any other provisions of the Offer, Parent will not be
required to accept for payment or (subject to any applicable rules and
regulations of the SEC, including Rule 14e-l(c) relating to the obligation of
Parent to pay for or return tendered Shares promptly after the termination or
withdrawal of the Offer) to pay for tendered Shares, or may terminate or amend
the Offer as provided in the Agreement, or may postpone the acceptance for
payment of, or payment for, Shares (whether or not any other Shares have been
accepted for payment or paid for pursuant to the Offer) if prior to the
expiration of the Offer (i) the Minimum Condition has not been satisfied; (ii)
the waiting period under the HSR Act has not expired or been terminated with
respect to purchase of the Shares; or (iii) if at any time on or after the date
of the Merger Agreement, and at any time before the time of acceptance for
payment of any such Shares, any of the following occurs:
 
     (a) any of the representations or warranties of the Company contained in
the Merger Agreement is not true and correct at and as of any date prior to the
expiration date of the Offer as if made at and as of such time, except for (i)
failures to be true and correct as would not have a Company Material Adverse
Effect or were known to Parent as of the date of the Merger Agreement; and (ii)
failures to comply as are capable of being and are cured prior to the earlier of
(A) 10 days after written notice from Parent to the Company of such failure or
(B) two business days prior to the expiration date of the Offer;
 
     (b) the Company has failed to comply with any of its obligations under the
Merger Agreement, except for (i) failures to so comply as would not have a
Company Material Adverse Effect or were known to Parent as of the date of the
Merger Agreement; and (ii) failures to comply as are capable of being and are
cured prior to the earlier of (A) 10 days after written notice from Parent to
the Company of such failure or (B) two business days prior to the expiration
date of the Offer;
 
     (c) the Special Committee or the Board has withdrawn or modified in any
respect adverse to Parent its recommendation of the Offer or taken any position
inconsistent with such recommendation;
 
     (d) the Merger Agreement has been terminated in accordance with its terms;
 
     (e) the Company has reached an agreement with Parent that the Offer or the
Merger be terminated or amended;
 
     (f) any state, federal, or foreign government, or governmental authority
has taken any action, or proposed, sought, promulgated, or enacted, or any
state, federal, or foreign government or governmental authority or court has
entered, enforced, or deemed applicable to the Offer or the Merger, any statute,
rule, regulation, judgment, order, or injunction that would (i) make the
acceptance for payment of, the payment for, or the purchase of, some or all of
the Shares illegal or otherwise restrict, materially delay, prohibit
consummation of, or make materially more costly, the Offer or the Merger, (ii)
result in a material delay in or restrict the ability of Parent, or render
Parent unable, to accept for payment, pay for or purchase some or all of the
Shares in the Offer, (iii) require the divestiture by Parent, Newco, or the
Company or any of their respective subsidiaries or affiliates of all or any
material portion of the business, assets, or property of any of them or any
Shares, or impose any material limitation on the ability of any of them to
conduct their business and own such assets, properties, and Shares, (iv) impose
material limitations on the ability of Parent to hold or to exercise effectively
all rights of ownership of the Shares, including the right to vote any Shares on
all matters properly presented to the stockholders of the Company, or (v) impose
any limitations on the ability of Parent, Newco, or any of their respective
subsidiaries or affiliates effectively to control in any material respect the
business or operations of the Company, Parent, Newco, or any of their respective
subsidiaries or affiliates;
 
     (g) any change (or any condition, event or development involving a
prospective change) has occurred or been threatened in the business, properties,
assets, liabilities, capitalization, stockholders' equity, financial condition,
operations, licenses or franchises results of operations, or prospects of the
Company, that would have a Company Material Adverse Effect;
<PAGE>   69
 
     (h) there has occurred (i) any general suspension of trading in, or
limitation on prices for, securities on any national securities exchange or in
the over-the-counter market or quotations for shares traded thereon as reported
by the Nasdaq or otherwise, (ii) a declaration of a banking moratorium or any
suspension of payments in respect of banks in the United States (whether or not
mandatory), (iii) any limitation (whether or not mandatory) by any governmental
authority on the extension of credit by banks or other financial institutions,
(iv) after the date of the Merger Agreement, an aggregate decline of at least
25% in the Dow Jones Industrial Average or Russell 2000 Index or a decline in
either such index of 12 1/2% in any 24-hour period, or (v) in the case of any of
the occurrences referred to in clauses (i) through (iv) existing at the time of
the commencement of the Offer, in the reasonable judgment of Parent, a material
acceleration or worsening thereof; or
 
     (i) any approval, permit, authorization, consent, or waiting period of any
domestic or foreign, governmental, administrative, or regulatory entity
(federal, state, local, provincial or otherwise) has not been obtained or
satisfied on terms satisfactory to Parent in its reasonable discretion and the
failure to obtain such consent, approval or authorization would have a Parent or
Company Material Adverse Effect;
 
that, in the good faith judgment of Parent and regardless of the circumstances
(including any action or inaction by Parent, or any of its affiliates) giving
rise to any such condition, makes it inadvisable to proceed with the Offer or
with such acceptance for payment of, or payment for, Shares or to proceed with
the Merger.
 
     The foregoing conditions are for the sole benefit of Parent and may be
asserted by Parent regardless of the circumstances giving rise to any such
condition or may be waived by Parent in whole or in part at any time and from
time to time in its sole discretion (subject to the terms of the Merger
Agreement). The failure by Parent at any time to exercise any of the foregoing
rights will not be deemed a waiver of any such right, the waiver of any such
right with respect to particular facts and circumstances will not be deemed to
waiver with respect to any other facts or circumstances, and each such right
will be deemed an ongoing right that may be asserted at any time and from time
to time.
<PAGE>   70
 
                                                                         ANNEX C
 
              DIRECTORS AND EXECUTIVE OFFICERS OF PARENT AND NEWCO
 
     1. DIRECTORS AND EXECUTIVE OFFICERS OF PARENT. The name, business address,
present principal occupation or employment and five-year employment history of
each of the directors and executive officers of Parent are set forth below.
Unless otherwise indicated, the business address of each such director and each
such executive officer is 3801 Greenwood Road, Fort Smith, Arkansas 72903.
Unless otherwise indicated below, each occupation set forth opposite an
individual's name refers to employment with Parent. All directors and executive
officers listed below are citizens of the United States.
 
<TABLE>
<CAPTION>
                                         POSITION WITH PARENT; PRINCIPAL OCCUPATION OR EMPLOYMENT;
      NAME AND BUSINESS ADDRESS               5-YEAR EMPLOYMENT HISTORY; OUTSIDE DIRECTORSHIPS
      -------------------------          ---------------------------------------------------------
<S>                                     <C>
Frank Edelstein......................   Mr. Edelstein, age 73, has been a Director of Parent since
                                        November 1988. Mr. Edelstein currently provides consulting
                                        services to Stonecreek Capital. Mr. Edelstein served as a
                                        Vice President of Kelso & Company, Inc. from 1986 to March
                                        1992. Prior to 1986, he served as Chairman and President of
                                        International Central Bank & Trust Company and CPI Pension
                                        Services, Inc., as well as Senior Vice President, Financial
                                        Services Group, at Continental Insurance Corporation. He
                                        also has held positions as Corporate Vice President,
                                        Automatic Data Processing, Inc. and Executive Vice President
                                        of Olivetti Corporation of America. Mr. Edelstein also is a
                                        Director of Ceradyne, Inc., and IHOP Corp.
Robert A. Young, III.................   Mr. Young, age 58, has been a Director of Parent since 1970
                                        and Chief Executive Officer of Parent since August 1988,
                                        President since 1973 and was Chief Operating Officer from
                                        1973 to 1988. Mr. Young has been a Director of the Company
                                        since June 1991. Mr. Young has been the President and a
                                        Director of Newco since it was formed in February 1999. Mr.
                                        Young also is a Director of Mosler, Inc.
William A. Marquard..................   Mr. Marquard, age 79, has been Chairman of the Board and a
                                        Director of Parent since November 1988 and a Director of the
                                        Company since June 1991. In April 1992, Mr. Marquard was
                                        elected as a Director of the Board of Kelso & Company, Inc.
                                        From 1971 to 1983, Mr. Marquard was President and Chief
                                        Executive Officer of American Standard Inc. and from 1979 to
                                        1985, he was Chairman of the Board of American Standard Inc.
                                        Mr. Marquard resumed his position as Chairman of the Board
                                        of American Standard Inc. in February 1989 until March 31,
                                        1992 when he was named Chairman Emeritus. Mr. Marquard also
                                        became Chairman of the Board of ASI Holding Corporation in
                                        February 1989 until March 31, 1992, when he was named
                                        Chairman Emeritus. Mr. Marquard is Chairman of the Board of
                                        Mosler, Inc., and a Director of Earle M. Jorgensen Co., and
                                        EarthShell Container Corporation.
</TABLE>
 
                                       C-1
<PAGE>   71
 
<TABLE>
<CAPTION>
                                         POSITION WITH PARENT; PRINCIPAL OCCUPATION OR EMPLOYMENT;
      NAME AND BUSINESS ADDRESS               5-YEAR EMPLOYMENT HISTORY; OUTSIDE DIRECTORSHIPS
      -------------------------          ---------------------------------------------------------
<S>                                     <C>
Alan J. Zakon, Ph.D..................   Dr. Zakon, age 62, has been a Director of Parent since
                                        February 1993. Dr. Zakon was a Managing Director of Bankers
                                        Trust Company through March, 1995, for which he previously
                                        served as Chairman, Strategic Policy Committee from 1989 to
                                        1990. From 1980 to 1986, Dr. Zakon was President of Boston
                                        Consulting Group before being named its Chairman in 1986,
                                        having previously served as Consultant from 1967 to 1969 and
                                        Vice President from 1969 to 1980. Dr. Zakon is currently
                                        serving as a member of the Board of Directors of several
                                        companies, including MicroFinancial, and Chairman of the
                                        Executive Committee of the Board of Autotote Corporation,
                                        and is a former member of the Advisory Committee to the
                                        Stanford University Graduate School of Business.
Arthur J. Fritz, Jr..................   Mr. Fritz, 58, has been a Director of Parent since April
                                        1989. From 1971 to 1986, Mr. Fritz was President of Fritz
                                        Companies, Inc. and its Chairman from 1986 to 1988. Mr.
                                        Fritz has served as Chairman of JABAR Enterprises since
                                        October 1988 and is a Director of Intercargo Corporation.
                                        Mr. Fritz is former President and Chairman of the National
                                        Association of Customs Brokers and Freight Forwarders of
                                        America.
John H. Morris.......................   Mr. Morris, 55, has been a Director of Parent since July
                                        1988 and a Director of the Company since June 1991. Mr.
                                        Morris currently serves as Co-Chairman of Stonecreek
                                        Capital. Mr. Morris is a Director of Outsourcing Services
                                        Group and Steelhorse Holdings, Inc. Mr. Morris served as a
                                        Managing Director of Kelso & Company, Inc. from March 1989
                                        to March 1992, was a General Partner from 1987 to March
                                        1989, and prior to 1987 was a Vice President. Prior to 1985,
                                        Mr. Morris was President of LBO Capital Corp. In February
                                        1997, Merchant's Transportation & Logistics Company, and its
                                        subsidiaries, filed petitions under Chapter 11 of the
                                        federal bankruptcy laws. Mr. Morris served as a Director of
                                        such entities through January 1997 and briefly served as the
                                        President of such entities for about a two-week period in
                                        November 1995 before these entities became operating
                                        companies.
Lary R. Scott........................   Mr. Scott, age 62, was appointed Parent's Executive Vice
                                        President in December 1995. Prior to its June 1997 merger
                                        into Parent, he was Chairman of the Board of WorldWay
                                        Corporation commencing in May 1994 and Vice Chairman and
                                        Chief Executive Officer of WorldWay commencing in 1993.
                                        WorldWay became a wholly owned subsidiary of Parent in
                                        August 1995; prior to that, it was a publicly traded
                                        company. For approximately two years prior to joining
                                        WorldWay, Mr. Scott served as a transportation consultant.
                                        Prior to that time, he was President and Chief Executive
                                        Officer of Consolidated Freightways, Inc. Mr. Scott serves
                                        on the board of directors of The Clorox Company.
</TABLE>
 
                                       C-2
<PAGE>   72
 
<TABLE>
<CAPTION>
                                         POSITION WITH PARENT; PRINCIPAL OCCUPATION OR EMPLOYMENT;
      NAME AND BUSINESS ADDRESS               5-YEAR EMPLOYMENT HISTORY; OUTSIDE DIRECTORSHIPS
      -------------------------          ---------------------------------------------------------
<S>                                     <C>
David E. Loeffler....................   Mr. Loeffler, age 52, was appointed Vice President -- Chief
                                        Financial Officer and Treasurer of Parent and the Company in
                                        April 1997. From December 1995 to April 1997, he was the
                                        Vice President -- Treasurer of Parent and Treasurer of the
                                        Company. From 1992 to 1995, Mr. Loeffler was a private
                                        investor and in investment management. From 1983 to 1992, he
                                        was Senior Vice President -- Finance and Administration and
                                        Chief Financial Officer for Yellow Freight System, Inc. Mr.
                                        Loeffler has been the Vice President and Treasurer and a
                                        Director of Newco since it was formed in February 1999.
Richard F. Cooper....................   Mr. Cooper, age 47, has been Vice
                                        President -- Administration since 1995, Vice
                                        President -- Risk Management of Parent from April 1991 to
                                        1995 and Vice President -- General Counsel since 1986. Mr.
                                        Cooper has been Secretary since 1987. Mr. Cooper has been
                                        Secretary of the Company since June 1991. Mr. Cooper also
                                        has been Vice President and Secretary and a Director of
                                        Newco since it was formed in February 1999.
J. Lavon Morton......................   Mr. Morton, age 48, was appointed Vice
                                        President -- Financial Reporting of Parent and of the
                                        Company in May 1997. Mr. Morton joined Parent as Assistant
                                        Treasurer in December 1996. From October 1984 until November
                                        1996, Mr. Morton was a Partner in Ernst & Young LLP. From
                                        1972 until 1984, Mr. Morton was employed by Ernst & Young
                                        LLP. Mr. Morton is a Certified Public Accountant.
Judy R. McReynolds...................   Ms. McReynolds, age 36, was appointed Controller of Parent
                                        in July 1998. Ms. McReynolds joined Parent as Director of
                                        Corporate Accounting in June 1997. During the period of June
                                        1995 through May 1997, Ms. McReynolds was employed as
                                        Director of Financial Reporting and Taxation with P.A.M.
                                        Transportation Services, Inc. From December 1990 until June
                                        1995, Ms. McReynolds was a senior manager employed with
                                        Ernst & Young LLP. Ms. McReynolds is a Certified Public
                                        Accountant.
Jerry A. Yarbrough...................   Mr. Yarbrough, age 60, has been Senior Vice
                                        President -- Corporate Development of the Parent since April
                                        1998. From January 1995 through March 1998, Mr. Yarbrough
                                        was Chairman of Integrated Distribution, Inc. and Best
                                        Logistics, Inc. From 1979 through 1994, Mr. Yarbrough was
                                        ABF Freight System, Inc.'s Senior Vice President --
                                        Operations and President of Data-Tronics Corp., a Parent
                                        subsidiary.
</TABLE>
 
     2. DIRECTORS AND EXECUTIVE OFFICERS OF NEWCO. The name, business address,
present principal occupation or employment and five-year employment history of
each of the directors and executive officers of Newco are set forth below.
Unless otherwise indicated, the business address of each such director and each
such executive officer is 3801 Greenwood Road, Fort Smith, Arkansas 72903.
Unless otherwise indicated below, each occupation set forth opposite an
individual's name refers to employment with Newco. All directors and executive
officers listed below are citizens of the United States.
 
<TABLE>
<CAPTION>
                                          POSITION WITH NEWCO; PRINCIPAL OCCUPATION OR EMPLOYMENT
      NAME AND BUSINESS ADDRESS               5-YEAR EMPLOYMENT HISTORY; OUTSIDE DIRECTORSHIPS
      -------------------------           -------------------------------------------------------
<S>                                     <C>
Robert A. Young, III.................   See above.
David E. Loeffler....................   See above.
Richard F. Cooper....................   See above.
</TABLE>
 
                                       C-3
<PAGE>   73
 
                                                                         ANNEX D
 
                DIRECTORS AND EXECUTIVE OFFICERS OF THE COMPANY
 
     The name, business address, present principal occupation or employment and
five-year employment history of each of the directors and executive officers of
the Company are set forth below. The business address of each such director and
executive officer is 1101 South 21st Street, Fort Smith, Arkansas 72501. Unless
otherwise indicated below, each occupation set forth opposite an individual's
name refers to employment with the Company. All such directors and executive
officers listed below are citizens of the United States.
 
<TABLE>
<CAPTION>
                                             POSITION WITH THE COMPANY; PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME AND BUSINESS ADDRESS                           5-YEAR EMPLOYMENT HISTORY; OUTSIDE DIRECTORSHIPS
- -------------------------                    --------------------------------------------------------------
<S>                                          <C>
Robert B. Gilbert.........................   Mr. Gilbert, age 74, has been a Director of the Company since
                                             December 1991. From April 1985 to February 1991, Mr. Gilbert
                                             was President and Chief Executive Officer of Rheem
                                             Manufacturing Co. Since his February 1991 retirement, Mr.
                                             Gilbert has been an independent consultant.
Nicolas M. Georgitsis.....................   Mr. Georgitsis, age 63, has been a Director of the Company
                                             since it was formed in June 1991. Mr. Georgitsis has been an
                                             independent consultant since January 1991. From February 1986
                                             to January 1991, Mr. Georgitsis was Senior Vice President of
                                             American Standard Inc. in charge of Transportation Products.
                                             Mr. Georgitsis is a Director of Mosler, Inc., and member of
                                             the Operating Board of Trust Company of the West (Latin
                                             America Fund).
John R. Meyers............................   Mr. Meyers, age 51, was appointed the Company's President --
                                             Chief Executive Officer in October 1995. Mr. Meyers served as
                                             Treasurer of the Company from June 1991 through October 1995.
                                             From 1979 through 1995 Mr. Meyers served as Vice President --
                                             Treasurer of Parent.
Daniel V. Evans...........................   Mr. Evans, age 51, has served as Executive Vice President --
                                             Chief Operating Officer since October 1995, and served as Vice
                                             President -- Administration of the Company from June 1991
                                             through October 1995. Mr. Evans served as Vice President --
                                             Administration of ABC-Treadco, Inc. from 1989 to 1991, and
                                             served as Director of Administration from 1977 to 1989.
William A. Marquard.......................   See ANNEX C.
Robert A. Young, III......................   See ANNEX C.
John H. Morris............................   See ANNEX C.
David E. Loeffler.........................   See ANNEX C.
Richard F. Cooper.........................   See ANNEX C.
J. Lavon Morton...........................   See ANNEX C.
</TABLE>
 
                                       D-1
<PAGE>   74
 
                                                                         ANNEX E
 
               DELAWARE GENERAL CORPORATION LAW APPRAISAL RIGHTS
 
sec. 262. Appraisal rights.
 
     (a) Any stockholder of a corporation of this State who holds shares of
stock on the date of the making of a demand pursuant to subsection (d) of this
section with respect to such shares, who continuously holds such shares through
the effective date of the merger or consolidation, who has otherwise complied
with subsection (d) of this section and who has neither voted in favor of the
merger or consolidation nor consented thereto in writing pursuant to sec. 228 of
this title shall be entitled to an appraisal by the Court of Chancery of the
fair value of the stockholder's shares of stock under the circumstances
described in subsections (b) and (c) of this section. As used in this section,
the word "stockholder" means a holder of record of stock in a stock corporation
and also a member of record of a nonstock corporation; the words "stock" and
"share" mean and include what is ordinarily meant by those words and also
membership or membership interest of a member of a nonstock corporation; and the
words "depository receipt" mean a receipt or other instrument issued by a
depository representing an interest in one or more shares, or fractions thereof,
solely of stock of a corporation, which stock is deposited with the depository.
 
     (b) Appraisal rights shall be available for the shares of any class or
series of stock of a constituent corporation in a merger or consolidation to be
effected pursuant to sec. 251 (other than a merger effected pursuant to
sec. 251(g) of this title), sec. 252, sec. 254, sec. 257, sec. 258, sec. 263 or
sec. 264 of this title:
 
          (1) Provided, however, that no appraisal rights under this section
     shall be available for the shares of any class or series of stock, which
     stock, or depository receipts in respect thereof, at the record date fixed
     to determine the stockholders entitled to receive notice of and to vote at
     the meeting of stockholders to act upon the agreement of merger or
     consolidation, were either (i) listed on a national securities exchange or
     designated as a national market system security on an interdealer quotation
     system by the National Association of Securities Dealers, Inc. or (ii) held
     of record by more than 2,000 holders; and further provided that no
     appraisal rights shall be available for any shares of stock of the
     constituent corporation surviving a merger if the merger did not require
     for its approval the vote of the stockholders of the surviving corporation
     as provided in subsection (f) of sec. 251 of this title.
 
          (2) Notwithstanding paragraph (1) of this subsection, appraisal rights
     under this section shall be available for the shares of any class or series
     of stock of a constituent corporation if the holders thereof are required
     by the terms of an agreement of merger or consolidation pursuant to
     sec.sec. 251, 252, 254, 257, 258, 263 and 264 of this title to accept for
     such stock anything except:
 
             a. Shares of stock of the corporation surviving or resulting from
        such merger or consolidation, or depository receipts in respect thereof;
 
             b. Shares of stock of any other corporation, or depository receipts
        in respect thereof, which shares of stock (or depository receipts in
        respect thereof) or depository receipts at the effective date of the
        merger or consolidation will be either listed on a national securities
        exchange or designated as a national market system security on an
        interdealer quotation system by the National Association of Securities
        Dealers, Inc. or held of record by more than 2,000 holders;
 
             c. Cash in lieu of fractional shares or fractional depository
        receipts described in the foregoing subparagraphs a. and b. of this
        paragraph; or
 
             d. Any combination of the shares of stock, depository receipts and
        cash in lieu of fractional shares or fractional depository receipts
        described in the foregoing subparagraphs a., b. and c. of this
        paragraph.
 
          (3) In the event all of the stock of a subsidiary Delaware corporation
     party to a merger effected under sec. 253 of this title is not owned by the
     parent corporation immediately prior to the merger, appraisal rights shall
     be available for the shares of the subsidiary Delaware corporation.
 
                                       E-1
<PAGE>   75
 
     (c) Any corporation may provide in its certificate of incorporation that
appraisal rights under this section shall be available for the shares of any
class or series of its stock as a result of an amendment to its certificate of
incorporation, any merger or consolidation in which the corporation is a
constituent corporation or the sale of all or substantially all of the assets of
the corporation. If the certificate of incorporation contains such a provision,
the procedures of this section, including those set forth in subsections (d) and
(e) of this section, shall apply as nearly as is practicable.
 
     (d) Appraisal rights shall be perfected as follows:
 
          (1) If a proposed merger or consolidation for which appraisal rights
     are provided under this section is to be submitted for approval at a
     meeting of stockholders, the corporation, not less than 20 days prior to
     the meeting, shall notify each of its stockholders who was such on the
     record date for such meeting with respect to shares for which appraisal
     rights are available pursuant to subsection (b) or (c) hereof that
     appraisal rights are available for any or all of the shares of the
     constituent corporations, and shall include in such notice a copy of this
     section. Each stockholder electing to demand the appraisal of his shares
     shall deliver to the corporation, before the taking of the vote on the
     merger or consolidation, a written demand for appraisal of his shares. Such
     demand will be sufficient if it reasonably informs the corporation of the
     identity of the stockholder and that the stockholder intends thereby to
     demand the appraisal of his shares. A proxy or vote against the merger or
     consolidation shall not constitute such a demand. A stockholder electing to
     take such action must do so by a separate written demand as herein
     provided. Within 10 days after the effective date of such merger or
     consolidation, the surviving or resulting corporation shall notify each
     stockholder of each constituent corporation who has complied with this
     subsection and has not voted in favor of or consented to the merger or
     consolidation of the date that the merger or consolidation has become
     effective; or
 
          (2) If the merger or consolidation was approved pursuant to sec. 228
     or sec. 253 of this title, each constituent corporation, either before the
     effective date of the merger or consolidation or within ten days
     thereafter, shall notify each of the holders of any class or series of
     stock of such constituent corporation who are entitled to appraisal rights
     of the approval of the merger or consolidation and that appraisal rights
     are available for any or all shares of such class or series of stock of
     such constituent corporation, and shall include in such notice a copy of
     this section; provided that, if the notice is given on or after the
     effective date of the merger or consolidation, such notice shall be given
     by the surviving or resulting corporation to all such holders of any class
     or series of stock of a constituent corporation that are entitled to
     appraisal rights. Such notice may, and, if given on or after the effective
     date of the merger or consolidation, shall, also notify such stockholders
     of the effective date of the merger or consolidation. Any stockholder
     entitled to appraisal rights may, within 20 days after the date of mailing
     of such notice, demand in writing from the surviving or resulting
     corporation the appraisal of such holder's shares. Such demand will be
     sufficient if it reasonably informs the corporation of the identity of the
     stockholder and that the stockholder intends thereby to demand the
     appraisal of such holder's shares. If such notice did not notify
     stockholders of the effective date of the merger or consolidation, either
     (i) each such constituent corporation shall send a second notice before the
     effective date of the merger or consolidation notifying each of the holders
     of any class or series of stock of such constituent corporation that are
     entitled to appraisal rights of the effective date of the merger or
     consolidation or (ii) the surviving or resulting corporation shall send
     such a second notice to all such holders on or within 10 days after such
     effective date; provided, however, that if such second notice is sent more
     than 20 days following the sending of the first notice, such second notice
     need only be sent to each stockholder who is entitled to appraisal rights
     and who has demanded appraisal of such holder's shares in accordance with
     this subsection. An affidavit of the secretary or assistant secretary or of
     the transfer agent of the corporation that is required to give either
     notice that such notice has been given shall, in the absence of fraud, be
     prima facie evidence of the facts stated therein. For purposes of
     determining the stockholders entitled to receive either notice, each
     constituent corporation may fix, in advance, a record date that shall be
     not more than 10 days prior to the date the notice is given, provided, that
     if the notice is given on or after the effective date of the merger or
     consolidation, the record date shall be such effective date. If no record
     date is fixed and the notice is given prior to the effective date, the
     record date shall be the close of business on the day next preceding the
     day on which the notice is given.
 
                                       E-2
<PAGE>   76
 
     (e) Within 120 days after the effective date of the merger or
consolidation, the surviving or resulting corporation or any stockholder who has
complied with subsections (a) and (d) hereof and who is otherwise entitled to
appraisal rights, may file a petition in the Court of Chancery demanding a
determination of the value of the stock of all such stockholders.
Notwithstanding the foregoing, at any time within 60 days after the effective
date of the merger or consolidation, any stockholder shall have the right to
withdraw his demand for appraisal and to accept the terms offered upon the
merger or consolidation. Within 120 days after the effective date of the merger
or consolidation, any stockholder who has complied with the requirements of
subsections (a) and (d) hereof, upon written request, shall be entitled to
receive from the corporation surviving the merger or resulting from the
consolidation a statement setting forth the aggregate number of shares not voted
in favor of the merger or consolidation and with respect to which demands for
appraisal have been received and the aggregate number of holders of such shares.
Such written statement shall be mailed to the stockholder within 10 days after
his written request for such a statement is received by the surviving or
resulting corporation or within 10 days after expiration of the period for
delivery of demands for appraisal under subsection (d) hereof, whichever is
later.
 
     (f) Upon the filing of any such petition by a stockholder, service of a
copy thereof shall be made upon the surviving or resulting corporation, which
shall within 20 days after such service file in the office of the Register in
Chancery in which the petition was filed a duly verified list containing the
names and addresses of all stockholders who have demanded payment for their
shares and with whom agreements as to the value of their shares have not been
reached by the surviving or resulting corporation. If the petition shall be
filed by the surviving or resulting corporation, the petition shall be
accompanied by such a duly verified list. The Register in Chancery, if so
ordered by the Court, shall give notice of the time and place fixed for the
hearing of such petition by registered or certified mail to the surviving or
resulting corporation and to the stockholders shown on the list at the addresses
therein stated. Such notice shall also be given by 1 or more publications at
least 1 week before the day of the hearing, in a newspaper of general
circulation published in the City of Wilmington, Delaware or such publication as
the Court deems advisable. The forms of the notices by mail and by publication
shall be approved by the Court, and the costs thereof shall be borne by the
surviving or resulting corporation.
 
     (g) At the hearing on such petition, the Court shall determine the
stockholders who have complied with this section and who have become entitled to
appraisal rights. The Court may require the stockholders who have demanded an
appraisal for their shares and who hold stock represented by certificates to
submit their certificates of stock to the Register in Chancery for notation
thereon of the pendency of the appraisal proceedings; and if any stockholder
fails to comply with such direction, the Court may dismiss the proceedings as to
such stockholder.
 
     (h) After determining the stockholders entitled to an appraisal, the Court
shall appraise the shares, determining their fair value exclusive of any element
of value arising from the accomplishment or expectation of the merger or
consolidation, together with a fair rate of interest, if any, to be paid upon
the amount determined to be the fair value. In determining such fair value, the
Court shall take into account all relevant factors. In determining the fair rate
of interest, the Court may consider all relevant factors, including the rate of
interest which the surviving or resulting corporation would have had to pay to
borrow money during the pendency of the proceeding. Upon application by the
surviving or resulting corporation or by any stockholder entitled to participate
in the appraisal proceeding, the Court may, in its discretion, permit discovery
or other pretrial proceedings and may proceed to trial upon the appraisal prior
to the final determination of the stockholder entitled to an appraisal. Any
stockholder whose name appears on the list filed by the surviving or resulting
corporation pursuant to subsection (f) of this section and who has submitted his
certificates of stock to the Register in Chancery, if such is required, may
participate fully in all proceedings until it is finally determined that he is
not entitled to appraisal rights under this section.
 
     (i) The Court shall direct the payment of the fair value of the shares,
together with interest, if any, by the surviving or resulting corporation to the
stockholders entitled thereto. Interest may be simple or compound, as the Court
may direct. Payment shall be so made to each such stockholder, in the case of
holders of uncertificated stock forthwith, and the case of holders of shares
represented by certificates upon the surrender to the corporation of the
certificates representing such stock. The Court's decree may be enforced as
                                       E-3
<PAGE>   77
 
other decrees in the Court of Chancery may be enforced, whether such surviving
or resulting corporation be a corporation of this State or of any state.
 
     (j) The costs of the proceeding may be determined by the Court and taxed
upon the parties as the Court deems equitable in the circumstances. Upon
application of a stockholder, the Court may order all or a portion of the
expenses incurred by any stockholder in connection with the appraisal
proceeding, including, without limitation, reasonable attorney's fees and the
fees and expenses of experts, to be charged pro rata against the value of all
the shares entitled to an appraisal.
 
     (k) From and after the effective date of the merger or consolidation, no
stockholder who has demanded his appraisal rights as provided in subsection (d)
of this section shall be entitled to vote such stock for any purpose or to
receive payment of dividends or other distributions on the stock (except
dividends or other distributions payable to stockholders of record at a date
which is prior to the effective date of the merger or consolidation); provided,
however, that if no petition for an appraisal shall be filed within the time
provided in subsection (e) of this section, or if such stockholder shall deliver
to the surviving or resulting corporation a written withdrawal of his demand for
an appraisal and an acceptance of the merger or consolidation, either within 60
days after the effective date of the merger or consolidation as provided in
subsection (e) of this section or thereafter with the written approval of the
corporation, then the right of such stockholder to an appraisal shall cease.
Notwithstanding the foregoing, no appraisal proceeding in the Court of Chancery
shall be dismissed as to any stockholder without the approval of the Court, and
such approval may be conditioned upon such terms as the Court deems just.
 
     (l) The shares of the surviving or resulting corporation to which the
shares of such objecting stockholders would have been converted had they
assented to the merger or consolidation shall have the status of authorized and
unissued shares of the surviving or resulting corporation.
 
                                       E-4
<PAGE>   78
 
                        The Depositary for the Offer is:
 
                        HARRIS TRUST COMPANY OF NEW YORK
 
<TABLE>
<S>                                            <C>
 
          By Hand/Overnight Courier:                              By Mail:
                Receive Window                              Wall Street Station
              Wall Street Plaza                                P.O. Box 1023
          88 Pine Street, 19th Floor                   New York, New York 10268-1023
           New York, New York 10005
</TABLE>
 
                                 By Facsimile:
 
                                 (212) 701-7636
 
                             Confirm by Telephone:
 
                                 (212) 701-7624
 
     Questions and requests for assistance or for additional copies of this
Offer to Purchase, the Letter of Transmittal and the Notice of Guaranteed
Delivery may be directed to the Information Agent at the telephone numbers and
location listed below. You may also contact your broker, dealer, bank, trust
company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                 Banks and Brokers Call Collect: (212) 269-5550
                    All Others Call Toll Free (800) 829-6554

<PAGE>   1
 
                             LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                                       OF
 
                                 TREADCO, INC.
             PURSUANT TO THE OFFER TO PURCHASE DATED MARCH 23, 1999
                                       BY
 
                           ARKANSAS BEST CORPORATION
- --------------------------------------------------------------------------------
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
        NEW YORK CITY TIME, ON TUESDAY, APRIL 20, 1999, UNLESS EXTENDED.
- --------------------------------------------------------------------------------
 
                        The Depositary for the Offer is:
 
                        HARRIS TRUST COMPANY OF NEW YORK
 
<TABLE>
<S>                                             <C>
                   By Mail:                              By Hand/Overnight Delivery:
             Wall Street Station                                Receive Window
                P.O. Box 1023                                 Wall Street Plaza
        New York, New York 10268-1023                     88 Pine Street, 19th Floor
                                                           New York, New York 10005
</TABLE>
 
                                 By Facsimile:
                                 (212) 701-7636
 
                             Confirm by Telephone:
                                 (212) 701-7624
 
         DELIVERY OF THIS INSTRUMENT TO AN ADDRESS, OR TRANSMISSION OF
      INSTRUCTIONS VIA A FACSIMILE NUMBER, OTHER THAN AS SET FORTH ABOVE,
                     DOES NOT CONSTITUTE A VALID DELIVERY.
 
       THE INSTRUCTIONS SET FORTH IN THIS LETTER OF TRANSMITTAL SHOULD BE
         READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
     This Letter of Transmittal is to be used either if certificates are to be
forwarded herewith or, unless an Agent's Message (as defined in "THE TENDER
OFFER -- Procedure for Tendering Shares" of the Offer to Purchase) is utilized,
if delivery of Shares (as defined below) is to be made by book-entry transfer to
the account maintained by the Depositary at the Book-Entry Transfer Facility as
defined in and pursuant to the procedures set forth in "THE TENDER
OFFER -- Procedure for Tendering Shares" of the Offer to Purchase. Stockholders
who deliver Shares by book-entry transfer are referred to herein as "Book-Entry
Stockholders" and other stockholders are referred to herein as "Certificate
Stockholders." Stockholders whose certificates for Shares are not immediately
available or who cannot deliver either the certificates for, or a Book-Entry
Confirmation (as defined in "THE TENDER OFFER -- Procedure for Tendering Shares"
of the Offer to Purchase) with respect to, their Shares and all other documents
required hereby to the Depositary (or who are unable to complete the procedure
for book-entry transfer on a timely basis) on or prior to the Expiration Date
(as defined in "THE TENDER OFFER -- Terms of the Offer" of the Offer to
Purchase) must tender their Shares in accordance with the guaranteed delivery
procedure set forth in "THE TENDER OFFER -- Procedure for Tendering Shares" of
the Offer to Purchase. See Instruction 2.
<PAGE>   2
 
                PLEASE SEE THE INSTRUCTIONS BEGINNING ON PAGE 8.
 
[ ]     CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER
        MADE TO THE ACCOUNT MAINTAINED BY THE DEPOSITARY WITH THE BOOK-ENTRY
        TRANSFER FACILITY AND COMPLETE THE FOLLOWING (ONLY PARTICIPANTS IN THE
        BOOK-ENTRY TRANSFER FACILITY MAY DELIVER SHARES BY BOOK-ENTRY TRANSFER):
 
      Name of Tendering Institution
 
                                   ---------------------------------------------
 
      Account Number
                    ------------------------------------------------------------
 
      Transaction Code Number
                             ---------------------------------------------------
 
[ ]     CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE
        OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE
        THE FOLLOWING:
 
      Name(s) of Registered Owner(s)
 
                                    --------------------------------------------
 
      Window Ticket Number (if any)
 
                                   ---------------------------------------------
 
      Date of Execution of Notice of Guaranteed Delivery
                                                        ------------------------
 
      Name of Institution which Guaranteed Delivery
                                                   -----------------------------
 
      --------------------------------------------------------------------------
 
      Account Number
                    ------------------------------------------------------------
 
      Transaction Code Number
                             ---------------------------------------------------
 
                                        2
<PAGE>   3
 
<TABLE>
<S>                                                        <C>                 <C>                 <C>
- ----------------------------------------------------------------------------------------------------------------------
                                            DESCRIPTION OF SHARES TENDERED
- ----------------------------------------------------------------------------------------------------------------------
NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
(PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S) APPEAR(S) ON                       SHARES TENDERED
CERTIFICATE(S))                                                       (ATTACH ADDITIONAL LIST IF NECESSARY)
- ----------------------------------------------------------------------------------------------------------------------
                                                                                  TOTAL NUMBER
                                                                                    OF SHARES            NUMBER
                                                               CERTIFICATE       REPRESENTED BY         OF SHARES
                                                               NUMBER(S)*        CERTIFICATE(S)*       TENDERED**
 
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                             ------------------------------------------------------
                                                              TOTAL SHARES
- ----------------------------------------------------------------------------------------------------------------------
  * Need not be completed by Book-Entry Stockholders.
 ** If you desire to tender fewer than all Shares evidenced by any certificates listed above, please indicate in this
    column the number of Shares you wish to tender. Otherwise, all Shares evidenced by such certificates will be
    deemed to have been tendered.
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                        3
<PAGE>   4
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Arkansas Best Corporation, a Delaware
corporation ("Parent"), the above-described shares of the outstanding common
stock, par value $.01 per share (the "Common Stock"), including the associated
common stock purchase rights (the "Rights" and, together with the Common Stock,
the "Shares") of Treadco, Inc. a Delaware corporation (the "Company"), pursuant
to Parent's offer to purchase all outstanding Shares at a price of $9.00 per
Share, net to the undersigned in cash, without interest thereon, in accordance
with the terms and conditions of Parent's Offer to Purchase, dated March 23,
1999 (the "Offer to Purchase"), and this Letter of Transmittal (which together
with any amendments or supplements thereto or hereto, collectively constitute
the "Offer"), receipt of which is hereby acknowledged. Capitalized terms used
herein and not otherwise defined have the meaning given them in the Offer to
Purchase.
 
     Upon the terms of the Offer, subject to, and effective upon, acceptance for
payment of, and payment for, the Shares tendered herewith in accordance with the
terms and subject to the conditions of the Offer (including, if the Offer is
extended or amended, the terms or conditions of any such extension or
amendment), the undersigned hereby sells, assigns and transfers to, or upon the
order of, Parent all right, title and interest in and to all the Shares tendered
hereby (and any and all other Shares or other securities or rights issued or
issuable in respect of such Shares on or after March 15, 1999) and irrevocably
constitutes and appoints the Depositary the true and lawful agent and
attorney-in-fact of the undersigned with respect to such Shares (and any such
other Shares or securities or rights), with full power of substitution (such
power of attorney being deemed to be an irrevocable power coupled with an
interest), to (a) deliver certificates for such Shares (and any such other
Shares or securities or rights) or transfer ownership of such Shares (and any
such other Shares or securities or rights) on the account books maintained by
the Book-Entry Transfer Facility, together, in any such case, with all
accompanying evidence of transfer and authenticity, to, or upon the order of,
Parent; (b) present such Shares (and any such other Shares or securities or
rights) for transfer on the Company's books; and (c) receive all benefits and
otherwise exercise all rights of beneficial ownership of such Shares (and any
such other Shares or securities or rights), all in accordance with the terms of
the Offer.
 
     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the tendered
Shares (and any and all other Shares or other securities or rights issued or
issuable in respect of such Shares on or after March 15, 1999) and that, when
the same are accepted for payment, Parent will acquire good, marketable and
unencumbered title thereto, free and clear of all liens, restrictions, claims,
charges and encumbrances and the same will not be subject to any adverse claim.
The undersigned will, upon request, execute any additional documents deemed by
the Depositary or Parent to be necessary or desirable to complete the sale,
assignment and transfer of the tendered Shares (and any such other Shares or
securities or rights).
 
     All authority conferred or agreed to be conferred in this Letter of
Transmittal shall be binding upon the successors, assigns, heirs, executors,
administrators, trustees in bankruptcy and legal representatives of the
undersigned and shall not be affected by, and shall survive, the death or
incapacity of the undersigned. Except as stated in the Offer to Purchase, this
tender is irrevocable.
 
     The undersigned hereby irrevocably appoints David E. Loeffler and Richard
F. Cooper, in their respective capacities as officers of Parent, and any
individual who shall hereafter succeed to any such office of Parent, and each of
them, and any other designees of Parent, the attorneys-in-fact and proxies of
the undersigned, each with full power of substitution, to vote at any annual,
special or adjourned meeting of the Company's stockholders or otherwise in such
manner as each such attorney and proxy or his substitute shall in his sole
discretion deem proper with respect to, to execute any written consent
concerning any matter as each such attorney and proxy or his substitute shall in
his sole discretion deem proper with respect to, and to otherwise act as each
such attorney and proxy or his substitute shall in his sole discretion deem
proper with respect to, all the Shares tendered hereby that have been accepted
for payment by Parent prior to the time any such action is
 
                                        4
<PAGE>   5
 
taken and with respect to which the undersigned is entitled to vote (and with
respect to any and all other Shares or other securities or rights issued or
issuable in respect of such Shares on or after March 15, 1999). This appointment
is effective when, and only to the extent that, Parent accepts for payment such
Shares as provided in the Offer to Purchase. This power of attorney and proxy
are irrevocable and are granted in consideration of the acceptance for payment
of such Shares in accordance with the terms of the Offer. Such acceptance for
payment shall, without further action, revoke all prior powers of attorney and
proxies appointed by the undersigned at any time with respect to such Shares
(and any such other Shares or securities or rights) and no subsequent powers of
attorney or proxies will be appointed by the undersigned, or be effective, with
respect thereto.
 
     The undersigned understands that the acceptance for payment by Parent of
tenders of Shares pursuant to any one of the procedures described in "THE TENDER
OFFER -- Procedure for Tendering Shares" of the Offer to Purchase and in
accordance with the Instructions hereto will constitute a binding agreement
between the undersigned and Parent upon the terms and subject to the conditions
of the Offer.
 
     Unless otherwise indicated herein under "Special Payment Instructions,"
please issue the check for the purchase price and/or return any certificates for
Shares not tendered or accepted for payment in the name(s) of the registered
holder(s) appearing under "Description of Shares Tendered." Similarly, unless
otherwise indicated under "Special Delivery Instructions," please mail the check
for the purchase price and/or return any certificates for Shares not tendered or
accepted for payment (and accompanying documents, as appropriate) to the
address(es) of the registered holder(s) appearing under "Description of Shares
Tendered."
 
     In the event that either or both of the Special Delivery Instructions and
the Special Payment Instructions are completed, please issue the check for the
purchase price and/or any certificates for Shares not tendered or accepted for
payment (and any accompanying documents, as appropriate) in the name of, and
deliver said check and/or return such certificates (and any accompanying
documents, as appropriate) to, the person or persons so indicated. The
undersigned recognizes that Parent has no obligation pursuant to the Special
Payment Instructions to transfer any Shares from the name of the registered
holder thereof if Parent does not accept for payment any of the Shares tendered
hereby.
 
     Unless otherwise indicated herein under "Special Delivery Instructions," in
the case of a book-entry delivery of Shares, please credit the account
maintained at the Book-Entry Transfer Facility with any Shares not accepted for
payment.
 
                                        5
<PAGE>   6
 
        ---------------------------------------------------------------
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if certificates for Shares not tendered or not
   accepted for payment and/or the check for the purchase price of Shares
   accepted for payment are to be issued in the name of someone other than
   the undersigned.
 
   Issue check and/or certificate(s) to:
 
   Name: 
         ---------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Address: 
            ------------------------------------------------------------
 
        ---------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
        ---------------------------------------------------------------
 
        ---------------------------------------------------------------
 
                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
        To be completed ONLY if certificates for Shares not tendered or not
   accepted for payment and/or the check for the purchase price of Shares
   accepted for payment are to be sent to someone other than the undersigned
   or to the undersigned at an address other than that indicated above.
 
   Issue check and/or certificate(s) to:
 
   Name: 
         ---------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Address:
            ------------------------------------------------------------
 
        ---------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
        ---------------------------------------------------------------
 
                                        6
<PAGE>   7
 
                                   SIGN HERE
                   (ALSO COMPLETE SUBSTITUTE FORM W-9 BELOW)
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                        (SIGNATURE(S) OF STOCKHOLDER(S))
 
                    Dated:                            , 1999
                          ---------------------------
 
     (Must be signed by registered holder(s) as name(s) appear(s) on the
certificate(s) for the Shares or on a security position listing or by person(s)
authorized to become registered holder(s) by certificates and documents
transmitted herewith. If signature is by trustees, executors, administrators,
guardians, attorneys-in-fact, officers of corporations or others acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5.)
 
Name(s)
 
- --------------------------------------------------------------------------------
                                 (PLEASE PRINT)
 
Capacity (full title)
                     -----------------------------------------------------------
 
Address
 
- --------------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
Area Code and Telephone No.
                           -----------------------------------------------------
 
                           GUARANTEE OF SIGNATURE(S)
                      (IF REQUIRED SEE INSTRUCTIONS 1 & 5)
 
Authorized Signature
                     -----------------------------------------------------------
 
Name:
      --------------------------------------------------------------------------
                                 (PLEASE PRINT)
 
Name of Firm
 
Address
      --------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
Area Code and Telephone No.
                           -----------------------------------------------------
 
Dated:                            , 1999
      ---------------------------
 
                                        7
<PAGE>   8
 
                                  INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. Guarantee of Signature. Except as otherwise provided below, all
signatures on this Letter of Transmittal must be guaranteed by a bank, broker,
dealer, credit union, savings association or other entity that is a member in
good standing of a recognized Medallion Program approved by The Securities
Transfer Association Inc. (each such entity an "Eligible Institution"). No
signature guarantee is required on this Letter of Transmittal (a) if this Letter
of Transmittal is signed by the registered holder(s) (which term, for purposes
of this document, shall include any participant in the Book-Entry Transfer
Facility whose name appears on a security position listing as the owner of
Shares) of Shares tendered herewith, unless such holder(s) has completed either
the box entitled "Special Delivery Instructions" or the box entitled "Special
Payment Instructions" on the reverse hereof, or (b) if such Shares are tendered
for the account of an Eligible Institution. See Instruction 5.
 
     2. Requirements of Tender. This Letter of Transmittal is to be completed by
stockholders either if certificates are to be forwarded herewith or, unless an
Agent's Message is utilized, if delivery of Shares is to be made pursuant to the
procedures for book-entry transfer set forth in "THE TENDER OFFER -- Procedure
for Tendering Shares" of the Offer to Purchase. For a stockholder validly to
tender Shares pursuant to the Offer, either (a) a properly completed and duly
executed Letter of Transmittal (or facsimile thereof), together with any
required signature guarantees (or an Agent's Message) and any other required
documents, must be received by the Depositary at one of its addresses set forth
herein prior to the Expiration Date and either (i) certificates for tendered
Shares must be received by the Depositary at one of such addresses prior to the
Expiration Date or (ii) Shares must be delivered pursuant to the procedures for
book-entry transfer set forth herein and a Book-Entry Confirmation must be
received by the Depositary prior to the Expiration Date or (b) the tendering
stockholder must comply with the guaranteed delivery procedures set forth below
and in "THE TENDER OFFER -- Procedure for Tendering Shares" of the Offer to
Purchase.
 
     Stockholders whose certificates for Shares are not immediately available or
who cannot deliver their certificates and all other required documents to the
Depositary or complete the procedures for book-entry transfer prior to the
Expiration Date may tender their Shares by properly completing and duly
executing the Notice of Guaranteed Delivery pursuant to the guaranteed delivery
procedures set forth in "THE TENDER OFFER -- Procedure for Tendering Shares" of
the Offer to Purchase. Pursuant to such procedures, (a) such tender must be made
by or through an Eligible Institution, (b) a properly completed and duly
executed Notice of Guaranteed Delivery substantially in the form provided by
Parent must be received by the Depositary prior to the Expiration Date, and (c)
the certificates for all physically delivered Shares or a Book-Entry
Confirmation with respect to all tendered Shares, as well as a properly
completed and duly executed Letter of Transmittal (or facsimile thereof) with
any required signature guarantees (or, in the case of a book-entry transfer, an
Agent's Message) and any other documents required by this Letter of Transmittal,
must be received by the Depositary within three New York Stock Exchange, Inc.
trading days after the date of execution of the Notice of Guaranteed Delivery.
 
     THE METHOD OF DELIVERY OF SHARES, THIS LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE TENDERING STOCKHOLDER. IF
DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO
ENSURE TIMELY DELIVERY.
 
     No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. All tendering stockholders, by execution of
this Letter of Transmittal (or facsimile thereof), waive any right to receive
any notice of the acceptance of their Shares for payment.
 
     3. Inadequate Space. If the space provided herein is inadequate, the
certificate numbers and/or the number of Shares should be listed on a separate
schedule attached hereto.
 
     4. Partial Tenders (Applicable to Certificate Stockholders Only). If fewer
than all the Shares evidenced by any certificate submitted are to be tendered,
fill in the number of Shares that are to be tendered in the box
 
                                        8
<PAGE>   9
 
entitled "Number of Shares Tendered." In any such case, new certificate(s) for
the remainder of the Shares that were evidenced by the old certificate(s) will
be sent to the registered holder, unless otherwise provided in the appropriate
box on this Letter of Transmittal as soon as practicable after the expiration of
the Offer. All Shares represented by certificates delivered to the Depositary
will be deemed to have been tendered unless otherwise indicated.
 
     5. Signatures on Letters of Transmittal; Stock Powers and Endorsements. If
this Letter of Transmittal is signed by the registered holder of the Shares
tendered hereby, the signature must correspond with the name as written on the
face of the certificate(s) without any change whatsoever.
 
     If any of the Shares tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.
 
     If any tendered Shares are registered in different names on several
certificates, it will be necessary to complete, sign and submit as many separate
Letters of Transmittal as there are different registrations of certificates.
 
     If this Letter of Transmittal or any certificates or stock powers are
signed by trustees, executors, administrators, guardians, attorneys-in-fact,
officers of corporations or others acting in a fiduciary or representative
capacity, such persons should so indicate when signing, and proper evidence
satisfactory to Parent of their authority so to act must be submitted.
 
     When this Letter of Transmittal is signed by the registered holder(s) of
the Shares listed and transmitted hereby, no endorsements of certificates or
separate stock powers are required unless payment is to be made to or
certificates for Shares not tendered or accepted for payment are to be issued to
a person other than the registered holder(s). Signatures on such certificates or
stock powers must be guaranteed by an Eligible Institution.
 
     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of certificates listed, the certificates must be endorsed
or accompanied by appropriate stock powers, in either case signed exactly as the
name or names of the registered owner or owners appear on the certificates.
Signatures on such certificates or stock powers must be guaranteed by an
Eligible Institution.
 
     6. Stock Transfer Taxes. Parent will pay any stock transfer taxes with
respect to the transfer and sale of Shares to it or its order pursuant to the
Offer. If, however, payment of the purchase price is to be made to, or if
certificates for Shares not tendered or accepted for payment are to be
registered in the name of, any persons other than the registered holder(s), or
if tendered certificates are registered in the name of any person other than the
person(s) signing this Letter of Transmittal, the amount of any stock transfer
taxes (whether imposed on the registered holder(s) or such person) payable on
account of the transfer to such person will be deducted from the purchase price
unless satisfactory evidence of the payment of such taxes or exemption therefrom
is submitted.
 
     EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE CERTIFICATES LISTED IN THIS LETTER OF
TRANSMITTAL.
 
     7. Special Payment and Delivery Instructions. If a check is to be issued in
the name of, and/or certificates for Shares not tendered or not accepted for
payment are to be returned to, a person other than the signer of this Letter of
Transmittal or if a check is to be sent and/or such certificates are to be
returned to a person other than the signer of this Letter of Transmittal or to
an address other than that shown above, the appropriate boxes on this Letter of
Transmittal should be completed.
 
     8. Waiver of Conditions. Subject to the terms of the Offer, Parent reserves
the absolute right in its sole discretion to waive any of the specified
conditions of the Offer, in whole or in part, in the case of any Shares
tendered.
 
     9. 31% Backup Withholding. Under U.S. Federal income tax law, a stockholder
whose tendered Shares are accepted for payment is required to provide the
Depositary with such stockholder's correct taxpayer
 
                                        9
<PAGE>   10
 
identification number ("TIN") on Substitute Form W-9 below. If the Depositary is
not provided with the correct TIN, the Internal Revenue Service may subject the
stockholder or other payee to a $50 penalty. In addition, payments that are made
to such stockholder or other payee with respect to Shares purchased pursuant to
the Offer may be subject to a 31% backup withholding.
 
     Certain stockholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, the stockholder must submit a Form W-8, signed under penalties of
perjury, attesting to that individual's exempt status. A Form W-8 can be
obtained from the Depositary. See the enclosed "Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9" for more instructions.
 
     If backup withholding applies, the Depositary is required to withhold 31%
of any such payments made to the stockholder or other payee. Backup withholding
is not an additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld, provided that the
required information is given to the Internal Revenue Service. If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.
 
     The box in Part 3 of the Substitute Form W-9 may be checked if the
tendering stockholder has not been issued a TIN and has applied for a TIN or
intends to apply for a TIN in the near future. If the box in Part 3 is checked,
the stockholder or other payee must also complete the Certificate of Awaiting
Taxpayer Identification Number below in order to avoid backup withholding. Even
if the box in Part 3 is checked and the Certificate of Awaiting Taxpayer
Identification Number is completed, the Depositary will withhold 31% on all
payments made prior to the time a properly certified TIN is provided to the
Depositary. However, such amounts will be refunded to such stockholder if a TIN
is provided to the Depositary within 60 days.
 
     The stockholder is required to give the Depositary the TIN (i.e., social
security number or employer identification number) of the record owner of the
Shares or of the last transferee appearing on the transfers attached to, or
endorsed on, the Shares. If the Shares are in more than one name or are not in
the name of the actual owner, consult the enclosed "Guidelines for Certification
of Taxpayer Identification Number on Substitute Form W-9" for additional
guidance on which number to report.
 
     10. Requests for Assistance or Additional Copies. Requests for additional
copies of the Offer to Purchase, this Letter of Transmittal, the Notice of
Guaranteed Delivery, and the Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9 should be directed to the
Information Agent at its address set forth below. Questions or requests for
assistance may also be directed to the Information Agent.
 
     IMPORTANT: THIS LETTER OF TRANSMITTAL OR A FACSIMILE COPY THEREOF (TOGETHER
WITH CERTIFICATES FOR, OR A BOOK-ENTRY CONFIRMATION WITH RESPECT TO, TENDERED
SHARES WITH ANY REQUIRED SIGNATURE GUARANTEES AND ALL OTHER REQUIRED DOCUMENTS)
MUST BE RECEIVED BY THE DEPOSITARY, OR THE NOTICE OF GUARANTEED DELIVERY MUST BE
RECEIVED BY THE DEPOSITARY, PRIOR TO THE EXPIRATION DATE.
 
                                       10
<PAGE>   11
 
<TABLE>
<S>                             <C>                                                      <C>
- ------------------------------------------------------------------------------------------------------------------------
 
                                  PART 1--PLEASE PROVIDE YOUR TIN IN THE BOX AT RIGHT     ----------------------------
  SUBSTITUTE                      AND CERTIFY BY SIGNING AND DATING BELOW.                   SOCIAL SECURITY NUMBER
   FORM W-9
                                                                                                       OR
                                                                                          ----------------------------
                                                                                         EMPLOYER IDENTIFICATION NUMBER
                                ----------------------------------------------------------------------------------------
  DEPARTMENT OF THE TREASURY
  INTERNAL REVENUE SERVICE        PART 2 -- CERTIFICATION -- UNDER PENALTIES OF                    PART 3  --
                                  PERJURY, I CERTIFY THAT:                                      AWAITING TIN [ ]
                                  (1) THE NUMBER SHOWN ON THIS FORM IS MY CORRECT
                                      TAXPAYER IDENTIFICATION (OR I AM WAITING FOR A
                                      NUMBER TO BE ISSUED FOR ME) AND
                                  (2) I AM NOT SUBJECT TO BACKUP WITHHOLDING EITHER
                                      BECAUSE: (A) I AM EXEMPT FROM BACKUP WITHHOLDING,
                                      OR (B) I HAVE NOT BEEN NOTIFIED BY THE INTERNAL
                                      REVENUE SERVICE (THE "IRS") THAT I AM SUBJECT TO
                                      THE BACKUP WITHHOLDING AS A RESULT OF A FAILURE
                                      TO REPORT ALL INTEREST OR DIVIDENDS OR (C) THE
                                      IRS HAS NOTIFIED ME THAT I AM NO LONGER SUBJECT
                                      TO BACKUP WITHHOLDING.
                                ----------------------------------------------------------------------------------------
</TABLE>
 
<TABLE>
<S>                                <C>                                               <C>
                                     CERTIFICATION INSTRUCTIONS -- YOU MUST CROSS OUT ITEM (2) ABOVE IF YOU HAVE BEEN
  PAYER'S REQUEST FOR                NOTIFIED BY THE IRS THAT YOU ARE CURRENTLY SUBJECT TO BACKUP WITHHOLDING BECAUSE
  TAXPAYER IDENTIFICATION            OF UNDERREPORTING INTEREST OR DIVIDENDS ON YOUR TAX RETURN. HOWEVER, IF AFTER
  NUMBER (TIN)                       BEING NOTIFIED BY THE IRS THAT YOU ARE SUBJECT TO BACKUP WITHHOLDING, YOU RECEIVED
                                     ANOTHER NOTIFICATION FROM THE IRS THAT YOU ARE NO LONGER SUBJECT TO BACKUP
                                     WITHHOLDING, DO NOT CROSS OUT SUCH ITEM (2).
                                     SIGNATURE __________  DATE __________
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER. PLEASE REVIEW
      THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
      NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
 
            YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE
                        BOX IN PART 3 OF SUBSTITUTE FORM W-9.
 
<TABLE>
<S>  <C>                                                                                                           <C>
- -----------------------------------------------------------------------------------------------------------------------
                            CERTIFICATE OF A PERSON AWAITING TAXPAYER IDENTIFICATION NUMBER
     I CERTIFY UNDER PENALTIES OF PERJURY THAT A TAXPAYER IDENTIFICATION NUMBER HAS NOT BEEN ISSUED TO ME, AND
     EITHER (1) I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TAXPAYER IDENTIFICATION NUMBER TO THE
     APPROPRIATE INTERNAL REVENUE SERVICE CENTER OR SOCIAL SECURITY ADMINISTRATION OFFICE OR (2) I INTEND TO MAIL
     OR DELIVER AN APPLICATION IN THE NEAR FUTURE. I UNDERSTAND THAT IF I DO NOT PROVIDE A TAXPAYER IDENTIFICATION
     NUMBER BY THE TIME OF PAYMENT, 31% OF ALL REPORTABLE PAYMENTS MADE TO ME WILL BE WITHHELD, BUT THAT SUCH
     AMOUNTS WILL BE REFUNDED TO ME IF I THEN PROVIDE A TAXPAYER IDENTIFICATION NUMBER WITHIN SIXTY (60) DAYS.
</TABLE>
 
<TABLE>
<S>  <C>                                                                  <C>                                   <C>
     SIGNATURE                                                            DATE
- --------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       11
<PAGE>   12
 
     Questions and requests for assistance or additional copies of the Offer to
Purchase, this Letter of Transmittal and other tender offer materials may be
directed to the Information Agent as set forth below.
 
                    THE INFORMATION AGENT FOR THIS OFFER IS:
 
                             D. F. KING & CO., INC.
                                77 Water Street
                              New York, N.Y. 10005
                 Banks and Brokers Call Collect: (212) 269-5550
                   All Others Call Toll Free: (800) 829-6554
 
                                       12

<PAGE>   1
 
                         NOTICE OF GUARANTEED DELIVERY
 
                                      FOR
 
                      TENDER OF SHARES OF COMMON STOCK AND
                    ASSOCIATED COMMON STOCK PURCHASE RIGHTS
 
                                       OF
 
                                 TREADCO, INC.
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)
 
     As set forth in "THE TENDER OFFER -- Procedure for Tendering Shares" of the
Offer to Purchase (as defined below), this form or one substantially equivalent
hereto must be used to accept the Offer (as defined below) if certificates
representing shares of common stock, par value $.01 per share (the "Common
Stock"), including the associated common stock purchase rights (the "Rights"
and, together with the Common Stock, the "Shares"), of Treadco, Inc., a Delaware
corporation (the "Company"), are not immediately available or if the procedures
for book-entry transfer cannot be completed on a timely basis or time will not
permit all required documents to reach the Depositary prior to the Expiration
Date (as defined in "THE TENDER OFFER -- Terms of the Offer" of the Offer to
Purchase). Such form may be delivered by hand or transmitted by telegram or
facsimile transmission or mailed to the Depositary and must include a guarantee
by an Eligible Institution (as defined in "THE TENDER OFFER -- Procedure for
Tendering Shares" of the Offer to Purchase). See "THE TENDER OFFER -- Procedure
for Tendering Shares" of the Offer to Purchase.
 
                        The Depositary for the Offer is:
 
                        HARRIS TRUST COMPANY OF NEW YORK
 
<TABLE>
<S>                                            <C>
                   By Mail:                             By Hand/Overnight Delivery:
             Wall Street Station                               Receive Window
                P.O. Box 1023                                Wall Street Plaza
        New York, New York 10268-1023                    88 Pine Street, 19th Floor
                                                          New York, New York 10005
</TABLE>
 
                                 By Facsimile:
                                 (212) 701-7636
 
                             Confirm by Telephone:
                                 (212) 701-7624
 
     DELIVERY OF THIS INSTRUMENT TO AN ADDRESS, OR TRANSMISSION OF INSTRUCTIONS
VIA A FACSIMILE NUMBER, OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A
VALID DELIVERY.
 
     This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an Eligible Institution
under the instructions thereto, such signature guarantee must appear in the
applicable space provided in the signature box on the Letter of Transmittal.
<PAGE>   2
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Arkansas Best Corporation, a Delaware
corporation ("Parent") upon the terms and subject to the conditions set forth in
Parent's Offer to Purchase, dated March 23, 1999 (the "Offer to Purchase"), and
in the related Letter of Transmittal (which, together with any amendments or
supplements thereto, collectively constitute the "Offer"), receipt of which is
hereby acknowledged, Shares pursuant to the guaranteed delivery procedures set
forth in "THE TENDER OFFER -- Procedure for Tendering Shares" of the Offer to
Purchase.
 
================================================================================

<TABLE>
    <S>                                                         <C>
 
    Number of Shares:                                           Address(es): 
                     -------------------------------                        ------------------------------------
                                                                ------------------------------------------------
    Name(s) of Record Holder(s): 
                                --------------------            ------------------------------------------------
    ------------------------------------------------                                                    Zip Code
    (Please Print)
                                                                Area Code and Tel. No.: 
                                                                                       -------------------------
    Certificate Nos. (if available):

    ------------------------------------------------            Account Number: 
                                                                               ---------------------------------
    ------------------------------------------------            Signature(s): 
                                                                              ----------------------------------
                                                                ------------------------------------------------
                                                                Dated: 
                                                                      ------------------------------------------
</TABLE>
 
================================================================================
 
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
     The undersigned, a commercial bank or trust company or savings institution
having an office or correspondent in the United States or a member firm of a
registered national securities exchange or a member of the National Association
of Securities Dealers, Inc., hereby guarantees to deliver to the Depositary
either the certificates representing the Shares tendered hereby, in proper form
for transfer, or a Book-Entry Confirmation (as defined in "THE TENDER
OFFER -- Procedure for Tendering Shares" of the Offer to Purchase) of a transfer
of such Shares, in any such case together with a properly completed and duly
executed Letter of Transmittal, or a manually signed facsimile thereof, with any
required signature guarantees or an Agent's Message, and any other documents
required by the Letter of Transmittal within three New York Stock Exchange, Inc.
trading days after the date hereof.
 
Name of Firm:
             -----------------------------------------
 
Address:
        ----------------------------------------------
 
- ------------------------------------------------------
                                           Zip Code
 
Area Code and Tel. No.:
                       -------------------------------

- ------------------------------------------------------
(Authorized Signature)
 
Title:
      ------------------------------------------------
 
Dated:
      ------------------------------------------------
 
NOTE:  DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE. SHARE CERTIFICATES
       SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.
 
                                        2

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                                 TREADCO, INC.
                                       AT
 
                              $9.00 NET PER SHARE
 
                                       BY
 
                           ARKANSAS BEST CORPORATION
- --------------------------------------------------------------------------------
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
        NEW YORK CITY TIME, ON TUESDAY, APRIL 20, 1999, UNLESS EXTENDED.
- --------------------------------------------------------------------------------
 
                                                                  March 23, 1999
 
To Brokers, Dealers, Banks,
  Trust Companies and Other Nominees:
 
     We are enclosing the materials listed below in connection with the offer by
Arkansas Best Corporation, a Delaware corporation ("Parent"), to purchase all
the outstanding shares of the common stock, par value $.01 per share (the
"Common Stock"), including the associated common stock purchase rights (the
"Rights" and, together with the Common Stock, the "Shares"), of Treadco, Inc., a
Delaware corporation (the "Company") at $9.00 per Share, net to the Seller in
cash, without interest, upon the terms and subject to the conditions set forth
in Parent's Offer to Purchase dated March 23, 1999 (the "Offer to Purchase"),
and the related Letter of Transmittal (which, together with any supplements or
amendments thereto, collectively constitute the "Offer").
 
     Please furnish copies of the enclosed materials to those of your clients
for whom you hold Shares registered in your name or in the name of your nominee.
Enclosed herewith are copies of the following documents:
 
          1. Offer to Purchase;
 
          2. Letter of Transmittal to be used by stockholders of the Company
     accepting the Offer;
 
          3. The Letter to Stockholders of the Company from the President and
     Chief Executive Officer of the Company accompanied by the Company's
     Solicitation/Recommendation Statement on Schedule 14D-9;
 
          4. A printed form of letter that may be sent to your clients for whose
     account you hold Shares in your name or in the name of a nominee, with
     space provided for obtaining such client's instructions with regard to the
     Offer;
 
          5. Notice of Guaranteed Delivery;
 
          6. Guidelines for Certification of Taxpayer Identification Number on
     Substitute Form W-9; and
 
          7. Return envelope addressed to the Depositary.
<PAGE>   2
 
WE URGE YOU TO CONTACT YOUR CLIENTS PROMPTLY. PLEASE NOTE THAT THE OFFER AND
WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON TUESDAY,
APRIL 20, 1999, UNLESS EXTENDED.
 
     The Board of Directors of the Company (the "Board"), based, among other
things, on the unanimous recommendation of a special committee of independent
directors of the Board, has, by unanimous vote of all directors, approved the
Offer and the Merger (as defined below) and determined that the Offer and the
Merger, taken together, are fair to, and in the best interests of, the
stockholders of the Company (other than Parent) and recommends that the
stockholders of the Company accept the Offer and tender their Shares pursuant to
the Offer.
 
     The Offer is being made pursuant to the Agreement and Plan of Merger dated
as of March 15, 1999 (the "Merger Agreement"), among Parent, Treadco Acquisition
Corporation, a Delaware corporation and wholly-owned subsidiary of Parent
("Newco"), and the Company pursuant to which, following the consummation of the
Offer and the satisfaction or waiver of certain conditions, Newco will be merged
with and into the Company, with the Company surviving the merger (as such, the
"Surviving Corporation") as a wholly-owned subsidiary of Parent (the "Merger").
 
     In the Merger, each outstanding Share (other than Shares owned by (i)
Parent, the Company or any direct or indirect subsidiary of Parent or (ii)
stockholders, if any, who are entitled to and who properly exercise dissenters'
rights under Delaware law) will be converted into the right to receive $9.00 per
Share, without interest, as set forth in the Merger Agreement and described in
the Offer to Purchase.
 
     In order to accept the Offer, a duly executed and properly completed Letter
of Transmittal with any required signature guarantees, or an Agent's Message (as
defined in the Offer to Purchase) in connection with a book-entry delivery of
Shares, and any other required documents should be sent to the Depositary and
either Share certificates representing the tendered Shares should be delivered
to the Depositary, or such Shares should be tendered by book-entry transfer into
the Depositary's account maintained at the Book-Entry Transfer Facility (as
described in "THE TENDER OFFER -- Procedure for Tendering Shares" of the Offer
to Purchase), all in accordance with the instructions set forth in the Letter of
Transmittal and the Offer to Purchase.
 
     If holders of Shares wish to tender, but it is impracticable for them to
forward their Share certificates or other required documents on or prior to the
Expiration Date or comply with the book-entry transfer procedures on a timely
basis, a tender may be effected by following the guaranteed delivery procedures
specified in "THE TENDER OFFER -- Procedure for Tendering Shares" of the Offer
to Purchase.
 
     Parent will not pay any fees or commissions to any broker or dealer or
other person (other than the Information Agent as described in the Offer to
Purchase) in connection with the solicitation of tenders of Shares pursuant to
the Offer. You will be reimbursed upon request for customary mailing and
handling expenses incurred by you in forwarding the enclosed offering materials
to your customers.
 
     Questions and requests for additional copies of the enclosed material may
be directed to the Information Agent at the addresses and telephone numbers set
forth on the back cover of the enclosed Offer to Purchase.
 
                                            Very truly yours,
 
                                            ARKANSAS BEST CORPORATION
 
NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL RENDER YOU OR ANY
OTHER PERSON THE AGENT OF PARENT, THE DEPOSITARY OR THE INFORMATION AGENT OR ANY
AFFILIATE OF ANY OF THEM, OR AUTHORIZE YOU OR ANY OTHER PERSON TO GIVE ANY
INFORMATION OR USE ANY DOCUMENT OR MAKE ANY STATEMENTS ON BEHALF OF ANY OF THEM
WITH RESPECT TO THE OFFER OTHER THAN THE ENCLOSED DOCUMENTS AND THE STATEMENTS
CONTAINED THEREIN.
                                        2

<PAGE>   1
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                           (INCLUDING THE ASSOCIATED
                         COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                                 TREADCO, INC.
                                       AT
 
                              $9.00 NET PER SHARE
 
                                       BY
 
                           ARKANSAS BEST CORPORATION
- --------------------------------------------------------------------------------
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
        NEW YORK CITY TIME, ON TUESDAY, APRIL 20, 1999 UNLESS EXTENDED.
- --------------------------------------------------------------------------------
 
To Our Clients:
 
     Enclosed for your consideration is an Offer to Purchase dated March 23,
1999 (the "Offer to Purchase"), and a related Letter of Transmittal (which,
together with any amendments or supplements thereto, collectively constitute the
"Offer") relating to an offer by Arkansas Best Corporation, a Delaware
corporation ("Parent"), to purchase all the outstanding shares (not owned by
Parent) of the common stock, par value $.01 per share (the "Common Stock"),
including the associated common stock purchase rights (the "Rights" and,
together with the Common Stock, the "Shares") of Treadco, Inc., a Delaware
corporation (the "Company"), at $9.00 per Share, net to the seller in cash,
without interest, upon the terms and subject to the conditions set forth in the
Offer. Also enclosed is the Letter to Stockholders of the Company from the
President and Chief Executive Officer of the Company accompanied by the
Company's Solicitation/ Recommendation Statement on Schedule 14D-9.
 
     WE ARE THE HOLDER OF RECORD OF SHARES HELD BY US FOR YOUR ACCOUNT. A TENDER
OF SUCH SHARES CAN BE MADE ONLY BY US AS THE HOLDER OF RECORD AND PURSUANT TO
YOUR INSTRUCTIONS. THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU FOR YOUR
INFORMATION ONLY AND CANNOT BE USED TO TENDER SHARES HELD BY US FOR YOUR
ACCOUNT.
 
     We request instructions as to whether you wish to tender any or all the
Shares held by us for your account, pursuant to the terms and conditions set
forth in the Offer.
 
     Your attention is invited to the following:
 
          1. The tender price is $9.00 per Share, net to the seller in cash,
     without interest, upon the terms and subject to the conditions set forth in
     the Offer.
 
          2. The Board of Directors of the Company (the "Board"), based, among
     other things, on the unanimous recommendation of a special committee of
     independent directors of the Board, has, by unanimous vote of all
     directors, approved the Offer and the Merger (as defined below) and
     determined that the Offer and the Merger, taken together, are fair to, and
     in the best interests of, the stockholders of the Company (other than
     Parent) and recommends that the stockholders of the Company accept the
     Offer and tender their Shares pursuant to the Offer.
<PAGE>   2
 
          3. The Offer is being made for all outstanding Shares.
 
          4. The Offer is being made pursuant to the Agreement and Plan of
     Merger dated as of March 15, 1999 (the "Merger Agreement"), among Parent,
     Treadco Acquisition Corporation, a Delaware corporation and wholly-owned
     subsidiary of Parent ("Newco"), and the Company pursuant to which,
     following the consummation of the Offer and the satisfaction or waiver of
     certain conditions, Newco will be merged with and into the Company, with
     the Company surviving the merger as a wholly-owned subsidiary of Parent
     (the "Merger"). In the Merger, each outstanding Share (other than Shares
     owned by (i) Parent, the Company or any direct or indirect subsidiary of
     Parent; or (ii) stockholders, if any, who are entitled to and who properly
     exercise dissenters' rights under Delaware law) will be converted into the
     right to receive $9.00 per Share, without interest, as set forth in the
     Merger Agreement and described in the Offer to Purchase.
 
          5. The Offer and withdrawal rights will expire at 12:00 Midnight, New
     York City time, on Tuesday, April 20, 1999, unless the Offer is extended by
     Parent. In all cases, payment for Shares accepted for payment pursuant to
     the Offer will be made only after timely receipt by the Depositary of
     certificates for such Shares (or timely Book-Entry Confirmation of a
     transfer of such Shares as described in "THE TENDER OFFER -- Procedure for
     Tendering Shares" of the Offer to Purchase), a properly completed and duly
     executed Letter of Transmittal (or facsimile thereof) or an Agent's Message
     (as defined in the Offer to Purchase) in connection with a book-entry
     delivery and any other documents required by the Letter of Transmittal.
 
          6. Parent will pay any stock transfer taxes with respect to the
     transfer and sale of Shares to it or its order pursuant to the Offer,
     except as otherwise provided in Instruction 6 of the Letter of Transmittal.
 
     If you wish to have us tender any of or all your Shares, please so instruct
us by completing, executing, detaching and returning to us the instruction form
set forth below. An envelope to return your instructions to us is enclosed. If
you authorize tender of your Shares, all such Shares will be tendered unless
otherwise specified below. Your instructions to us should be forwarded promptly
to permit us to submit a tender on your behalf prior to the expiration of the
Offer.
 
     The Offer is not being made to, nor will tenders be accepted from or on
behalf of, holders of Shares in any jurisdiction in which the making or
acceptance of the Offer would not be in compliance with the laws of such
jurisdiction.
 
                                        2
<PAGE>   3
 
               INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                                 TREADCO, INC.
 
     The undersigned acknowledges receipt of your letter enclosing the Offer to
Purchase dated March 23, 1999, of Arkansas Best Corporation, a Delaware
corporation, and the related Letter of Transmittal, relating to shares of the
common stock, par value $.01 per share (the "Common Stock"), including the
associated common stock purchase rights (the "Rights" and, together with the
Common Stock, the "Shares") of Treadco, Inc., a Delaware corporation.
 
     This will instruct you to tender the number of Shares indicated below held
by you for the account of the undersigned on the terms and conditions set forth
in such Offer to Purchase and the related Letter of Transmittal.
 
Dated:  __________ , 1999
 
- ---------------------------------------------------------
 
<TABLE>
<S>                                                         <C>
  NUMBER OF SHARES TO BE TENDERED*
  ________ Shares
- --------------------------------------------------------
</TABLE>
 
                                            ------------------------------------
 
                                            ------------------------------------
                                                        Signature(s)
 
                                            ------------------------------------
 
                                            ------------------------------------
                                                    Please print name(s)
 
                                            ------------------------------------
 
                                            ------------------------------------
                                                 Address (Include Zip Code)
 
                                            ------------------------------------
 
                                            ------------------------------------
                                                Area Code and Telephone No.
 
                                            ------------------------------------
 
                                            ------------------------------------
                                             Taxpayer Identification or Social
                                                        Security No.
 
- ---------------
 
* Unless otherwise indicated, it will be assumed that all your Shares are to be
  tendered.
                                        3

<PAGE>   1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE PAYER.
Social Security numbers have nine digits separated by two hyphens: i.e.
000-00-0000. Employer identification numbers have nine digits separated by only
one hyphen: i.e. 00-0000000. The table below will help determine the number to
give the payer.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                            GIVE THE
                                        SOCIAL SECURITY
OP     FOR THIS TYPE OF ACCOUNT:            NUMBER OF--
- -----------------------------------------------------------
<S>  <C>                             <C>
 1.  An individual's account         The individual
 2.  Two or more individuals (joint  The actual owner of
     account)                        the account or, if
                                     combined funds, any
                                     one of the
                                     individuals(1)
 3.  Husband and wife (joint         The actual owner of
     account)                        the account or, if
                                     joint funds, either
                                     person(1)
 4.  Custodian account of a minor    The minor(2)
     (Uniform Gift to Minors Act)
 5.  Adult and minor (joint          The adult or, if the
     account)                        minor is the only
                                     contributor, the
                                     minor(1)
 6.  Account in the name of          The ward, minor or
     guardian or committee for a     incompetent person(3)
     designated ward, minor, or
     incompetent person
 7.  a. The usual revocable savings  The grantor-
        trust account (grantor is    trustee(1)
        also trustee)
     b. So-called trust account      The actual owner(1)
        that is not a legal or valid
        trust under State law
 8.  Sole proprietorship account     The owner(4)
- -----------------------------------------------------------
</TABLE>
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                       GIVE THE EMPLOYER
                                         IDENTIFICATION
     FOR THIS TYPE OF ACCOUNT:            NUMBER OF--
- -----------------------------------------------------------
<C>  <S>                             <C>
 9.  A valid trust, estate, or       The legal entity (Do
     pension trust                   not furnish the
                                     identifying number of
                                     the personal
                                     representative or
                                     trustee unless the
                                     legal entity itself is
                                     not designated in the
                                     account title)(5)
 
10.  Corporate account               The corporation
 
11.  Religious, charitable, or       The organization
     educational organization
     account
 
12.  Partnership account held in     The partnership
     the name of the business
 
13.  Association, club, or other     The organization
     tax-exempt organization
 
14.  A broker or registered nominee  The broker or nominee
 
15.  Account with the Department of  The public entity
     Agriculture in the name of a
     public entity (such as a State
     or local government, school
     district, or prison) that
     receives agricultural program
     payments
- -----------------------------------------------------------
</TABLE>

(1) List first and circle the name of the person whose number you furnish.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
(4) Show the name of the owner.
(5) List first and circle the name of the legal trust, estate, or pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.

<PAGE>   2
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
                                     PAGE 2
 
OBTAINING A NUMBER
If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service and apply for a
number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
Payees specifically exempted from backup withholding on ALL payments include the
following:
  - A corporation.
  - A financial institution.
  - An organization exempt from tax under section 501(a), or an individual
    retirement.
  - The United States or any agency or instrumentality thereof.
  - A State, the District of Columbia, a possession of the United States, or any
    subdivision or instrumentality thereof.
  - A foreign government, a political subdivision of a foreign government, or
    any agency or instrumentality thereof.
  - An international organization or any agency, or instrumentality thereof.
  - A registered dealer in securities or commodities registered in the U.S. or a
    possession of the U.S.
  - A real estate investment trust.
  - A common trust fund operated by a bank under section 584(a).
  - An exempt charitable remainder trust, or a non-exempt trust described in
    Section 4947(a)(1).
  - An entity registered at all times under the Investment Company Act of 1940.
  - A foreign central bank of issue.
  Payments of dividends and patronage dividends not generally subject to backup
  withholding include the following:
  - Payments to nonresident aliens subject to withholding under Section 1441.
  - Payments to partnerships not engaged in a trade or business in the U.S. and
    which have at least one nonresident partner.
  - Payments of patronage dividends where the amount received is not paid in
    money.
  - Payments made by certain foreign organizations.
  - Payments made to a nominee.
  Payments of interest not generally subject to backup withholding include the
  following:
  - Payments of interest on obligations issued by individuals. NOTE: You may be
    subject to backup withholding if this interest is $600 or more, and is paid
    in the course of the payer's trade or business and you have not provided
    your correct taxpayer identification number to the payer.
  - Payments of tax-exempt interest (including exempt-interest dividends under
    Section 852).
  - Payments described in Section 6049(b)(5) to non-resident aliens.
  - Payments on tax-free covenant bonds under Section 1451.
  - Payments made by certain foreign organizations.
  - Payments made to a nominee.
 
Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS, ALSO
SIGN AND DATE THE FORM.
 
  Certain payments other than interest, dividends, and patronage dividends, that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under Sections 6041, 6041A(a),
6045, and 6050A.
 
  PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to IRS. IRS uses the numbers for identification
purposes. Payers must be given the numbers whether or not recipients are
required to file tax returns. Beginning January 1, 1994, payers must generally
withhold 20% of taxable interest, dividend, and certain other payments to a
payee who does not furnish a taxpayer identification number to a payer. Certain
penalties may also apply.
 
PENALTIES
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. If you fail
to furnish your taxpayer identification number to a payer, you are subject to a
penalty of $50 for each such failure unless your failure is due to reasonable
cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. If you make
a false statement with no reasonable basis which results in no imposition of
backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. Falsifying certifications or
affirmations may subject you to criminal penalties including fines and/or
imprisonment.
 
                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                  CONSULTANT OR THE INTERNAL REVENUE SERVICE.

<PAGE>   1
                                                                  EXHIBIT (d)(7)

TREADCO, INC. REPORTS 1999 FIRST QUARTER OPERATING RESULTS

April 14, 1999 02:49 PM FORT SMITH, Ark., April 14 /PRNewswire/ -- Treadco, Inc.
TRED today reported a net loss of $482,444, or $0.10 per common share (basic and
diluted), for the 1999 first quarter, which includes non-recurring charges of
approximately $0.06 per common share (basic and diluted). Without these non-
recurring charges, Treadco's loss was approximately $172,444, or $0.04 per
common share (basic and diluted). This compares to a net loss of $627,466, or a
loss of $0.12 per common share (basic and diluted), for the first quarter of
1998.

The non-recurring charges total approximately $310,000 and represent investment
banking and legal expenses related to the fairness opinion provided to the
special committee of independent directors of Treadco regarding the current
$9.00 per share tender offer by Arkansas Best Corporation for the Treadco shares
not already owned by Arkansas Best. The $310,000 non-tax deductible charge is
included in other non-operating expense.

During the quarter, Treadco had sales of $40.9 million which represents a 9.2%
increase over the same period of 1998. Treadco's operating loss was $255,414
compared to a 1998 first quarter operating loss of $576,494.

The foregoing release contains forward-looking statements that are based on
current expectations and are subject to a number of risks and uncertainties.
Actual results could differ materially from current expectations due to a number
of factors, including general economic conditions; competitive initiatives and
pricing pressures; availability and cost of capital; shifts in market demand;
weather conditions; government regulations; the performance and needs of
industries served by Treadco; actual future costs of operating expenses such as
the price of oil; self-insurance claims and employee wages and benefits; and the
timing and amount of capital expenditures.

    The following table provides a breakdown of sales by category:

<TABLE>
<CAPTION>
                                                 Three Months Ended
                                                     March 31
                                           1999        1998       Increase
    <S>                               <C>           <C>           <C>
    SALES
     Retread                          $16,125,552   $15,503,889     4.0%
     New Tires                         20,255,206    18,289,075    10.8%
     Service                            4,563,636     3,711,984    22.9%
                                      $40,944,394   $37,504,948     9.2%
</TABLE>

<PAGE>   2

    TREADCO, INC.
    STATEMENTS OF OPERATIONS (Unaudited)

<TABLE>
<CAPTION>
                                              Three Months Ended
                                                    March 31
                                              1999             1998
<S>                                        <C>           <C>        
    SALES
     Non-affiliates                        $40,460,114   $36,554,973
     Affiliates                                484,280       949,975
                                            40,944,394    37,504,948

    COSTS AND EXPENSES
     Materials and cost of new tires        26,551,866    24,676,323
     Salaries and wages                      7,994,496     7,010,541
     Depreciation and amortization           1,659,701     1,487,801
     Administrative and general              4,993,745     4,906,777
                                            41,199,808    38,081,442
    OPERATING LOSS                            (255,414)     (576,494)

    OTHER INCOME
     Interest income                            10,700        11,121
     Gain on asset sales                       311,188        22,725
     Other                                         ---        51,139
                                               321,888        84,985

    OTHER EXPENSES
     Tender offer response costs               310,000           ---
     Interest                                  176,098       299,010
     Amortization of goodwill                  115,497       115,497
     Amortization of noncompete agreements         ---        65,312
     Other                                         516           ---
                                               602,111       479,819
    LOSS BEFORE INCOME TAXES                  (535,637)     (971,328)

    FEDERAL AND STATE INCOME TAXES (CREDIT)
     Current                                    39,485      (295,965)
     Deferred                                  (92,678)      (47,897)
                                               (53,193)     (343,862)
    NET LOSS                                 $(482,444)    $(627,466)

    LOSS PER COMMON SHARE (Basic
     and Diluted)                            $   (0.10)    $   (0.12)

    AVERAGE COMMON SHARES OUTSTANDING
    (Basic and Diluted)                      5,072,255     5,072,255

    CASH DIVIDENDS PAID PER COMMON SHARE     $    0.00     $    0.00
</TABLE>

<PAGE>   3


    TREADCO, INC.
    CONDENSED BALANCE SHEETS (Unaudited)

<TABLE>
<CAPTION>
                                               March 31    December 31
                                                 1999         1998
    ASSETS
    <S>                                     <C>           <C>        
     Current assets                         $56,435,223   $59,565,917
     Property, plant and equipment (net)     36,059,728    34,313,351
     Deferred income taxes                      160,956       145,526
     Other assets                             1,400,219     1,113,431
     Goodwill (less amortization)            12,116,667    12,232,164
                                           $106,172,793  $107,370,389

    LIABILITIES AND STOCKHOLDERS' EQUITY
     Current liabilities                    $29,602,151   $35,892,840
     Long-term debt (less current portion)   11,733,229     6,159,351
     Other liabilities                          104,057       102,398
     Stockholders' equity                    64,733,356    65,215,800
                                           $106,172,793  $107,370,389
</TABLE>

    TREADCO, INC.
    CONDENSED STATEMENTS OF CASH FLOWS (Unaudited)

<TABLE>
<CAPTION>
                                                  Three Months Ended
                                                        March 31
                                                 1999          1998
    <S>                                       <C>           <C>
    OPERATING ACTIVITIES
     Net cash provided (used) by
      operating activities                    $(274,518)   $2,248,700

    INVESTING ACTIVITIES
     Purchases of property, plant and
       equipment, less capitalized leases    (4,835,841)     (821,181)
     Construction in progress                       ---      (641,671)
     Proceeds from asset sales                2,131,185        22,725
     Net cash used in investing activities   (2,704,656)   (1,440,127)

    FINANCING ACTIVITIES
     Borrowings under revolving
      credit facility                        19,600,000    14,400,000
     Payments under revolving
      credit facilities                     (13,550,000)  (15,400,000)
     Payments on long-term debt                (597,782)     (584,636)
     Net increase (decrease) in
      cash overdrafts                        (2,473,044)      776,063
     Net cash provided (used) in
      financing activities                    2,979,174      (808,573)

    NET DECREASE IN CASH AND
     CASH EQUIVALENTS                               ---           ---
     Cash and cash equivalents at
      beginning of period                           ---           ---
    CASH AND CASH EQUIVALENTS AT
     END OF PERIOD                           $      ---      $    ---
</TABLE>

SOURCE Treadco, Inc.



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