Exhibit 10.1




JOINDER AGREEMENT 



        This
JOINDER AGREEMENT is made and entered into as of the 30th day of May,
2007, by and among GRIP ACQUISITION CORPORATION, an Iowa corporation
(“MergerCo”), International Wrestling Institute & Museum an Iowa
not-for-profit corporation (the “Joining Stockholder”), and ROY J. CARVER,
JR. (the “Shareholder”) and relates to that certain Voting Agreement (the
“Voting Agreement”) dated as of December 5, 2006, between MergerCo and the
Shareholder. 



        WHEREAS,
simultaneously with the execution of the Agreement and Plan of Merger, dated as of
December 5, 2006, by and among MergerCo, Bridgestone Americas Holding, Inc. and Bandag,
Incorporated (the “Merger Agreement”), MergerCo and the Shareholder entered into
the Voting Agreement pursuant to which the Shareholder agreed to, among other things, vote
his Owned Shares in favor of the adoption of the Merger Agreement and approval of the
Merger (as defined in the Merger Agreement) at the Shareholder Meeting; and 



        WHEREAS,
the Shareholder wishes to assign 2,000 shares of Class A Common Stock, par value $1.00 per
share, of Bandag, Incorporated (the “Assigned Shares”) to the Joining
Stockholder; and 



        WHEREAS,
MergerCo is willing to consent to such transfer of the Assigned Shares as a Transfer to a
Permitted Transferee pursuant to Section 2.3 of the Voting Agreement, provided that the
Joining Stockholder becomes a party to the Voting Agreement, and the Joining Stockholder
desires to do so in accordance with the terms hereof. 



        NOW,
THEREFORE, in consideration of the mutual covenants contained herein and other good
and valuable consideration, the receipt and sufficiency of which are hereby acknowledged,
the parties to this Joinder Agreement agree as follows: 



        1.              Agreement
to be Bound. The Joining Stockholder acknowledges and agrees that,           upon the
execution of this Joinder Agreement, it shall (a) join and become a           party to
the Voting Agreement and shall be fully bound by, and subject to, all           of the
covenants, terms and conditions of the Voting Agreement as though an           original
party thereto (including but not limited to, the Agreement to Vote and
          Restrictions on Transfers pursuant to Article II of the Voting Agreement, and
          the Additional Covenants pursuant to Article IV of the Voting Agreement); (b)
          perform all obligations, duties and liabilities of the Shareholder pursuant to
          the Voting Agreement with respect to the Assigned Shares; and (c) be deemed a
          “Shareholder” thereunder for all purposes.  




        2.              Consent.
MergerCo consents to the Shareholder’s Transfer of the Assigned           Shares to
the Joining Stockholder as a Permitted Transferee.  




        3.              Assumption
of Liability. The Shareholder hereby assumes joint and several           liability for
any and all obligations, duties and liabilities of the Joining           Stockholder with
respect to the Assigned Shares under the Voting Agreement.  













        4.              Representations
and Warranties of Shareholder and Joining Stockholder. Each of           the Shareholder
and the Joining Stockholder jointly and severally represents and           warrants to
MergerCo that it has the requisite capacity and authority to execute           and
deliver this Joinder Agreement and to fulfill and perform his or its
          obligations hereunder. This Joinder Agreement has been duly and validly
executed           and delivered by the Shareholder and the Joining Stockholder and
constitutes a           legal, valid and binding agreement of the Shareholder and the
Joining           Stockholder enforceable by MergerCo against the Shareholder and the
Joining           Stockholder in accordance with its terms, except as such may be limited
by           bankruptcy, insolvency, reorganization or other laws affecting creditors’          rights
generally and by general equitable principles.  




        5.              Representations
and Warranties of MergerCo. MergerCo represents and warrants to           the Shareholder
and the Joining Stockholder that it has the requisite capacity           and authority to
execute and deliver this Joinder Agreement and to fulfill and           perform his or
its obligations hereunder. This Joinder Agreement has been duly           and validly
executed and delivered by MergerCo and constitutes a legal, valid           and binding
agreement of MergerCo enforceable by the Shareholder and the Joining
          Stockholder against MergerCo in accordance with its terms, except as such may
be           limited by bankruptcy, insolvency, reorganization or other laws affecting
          creditors’ rights generally and by general equitable principles.  




        6.              Binding
Effect. This Joinder Agreement shall be binding upon and shall inure to           the
benefit of, and be enforceable by, MergerCo, the Shareholder, the Joining
          Stockholder and their respective heirs, personal representatives, successors
and           assigns.  




        7.              Assignment.
Neither this Joinder Agreement nor any right, interest or obligation           hereunder
may be assigned by any party hereto, in whole or part (whether by           operation of
law or otherwise), without the prior written consent of the other           parties
hereto and any attempt to do so will be null and void.  




        8.              Amendments.
This Joinder Agreement may not be amended except by written           agreement signed by
all of the parties to this Joinder Agreement.  




        9.              Counterparts.
This Joinder Agreement may be executed in one or more           counterparts, each of
which shall be deemed to constitute an original and shall           become effective when
one or more counterparts has been executed by each party           hereto and delivered
to the other party.  




        10.              Capitalized
Terms. Capitalized terms used in this Joinder Agreement and not           defined herein
shall have the meanings ascribed to such terms in the Voting           Agreement and the
Merger Agreement.  













        11.              Governing
Law. This Joinder Agreement shall be governed by and construed in           accordance
with the laws of the State of Iowa (without reference to such           State’s
conflicts of laws provisions).  




        IN
WITNESS WHEREOF, the parties hereto have executed this Joinder Agreement as of the
date first above written. 




		MERGERCO:
	
 	GRIP ACQUISITION CORPORATION
	

 	By:  /s/ Saul Solomon
		Name:  Saul Solomon
		Title:  President
	

 	JOINING STOCKHOLDER:
	
 	INTERNATIONAL WRESTLING INSTITUTE & MUSEUM
	

 	By:  /s/ Mike Chapman
		Name:  Mike Chapman
		Title:  Executive Director
	

 	SHAREHOLDER
	

 	/s/ Roy J. Carver, Jr.
		Roy J. Carver, Jr.