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Old 03-29-2016, 12:03 PM
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Bernica Bernica is offline
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Join Date: Nov 2004
Location: SoCal, CA
Cobra Make, Engine: CSX #4xxx with CSX 482; David Kee Toploader
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Quote:
Originally Posted by Mark IV View Post
They are cracked because they do not contain plasticizer additive used on street tires. "Billboards" are race tires and have an expected half life of a weekend. UV exposure and ozone cause the tires to crack. It is to be expected and is one of the reasons that they are molded with "NOT FOR HIGHWAY USE" on the sidewalls.

If you run them plan on a new set yearly.
Yup. These have less than 500 miles on them, then the car was parked for quite a while (about a year). One by one, they cracked and blew out. Some cracks so big I could fit my finger in them! What Mark IV says is true. I confirmed it with Goodyear..."made to buy on Friday, race the weekend and trash them on Monday".
AVONS now!
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