The O’Reilly NCRA Sprint Car Series, presented by ICM/Ethanol, has announced May 1 as the date they will start using the 2007 tire rule.
The 2007 NCRA Sprint Car Division Rules and Regulations read as follows:
“The right rear must be Hoosier 105-16-15 #38221 Med. Hoosier left rear 88/96/15 Medium only (left rear optional on co-sanctioned events only). Front tires optional. Recommended all Hoosiers. Tires may be derometored no more than two points. Must check within two points of manufacturer.”

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