Quote:
Originally Posted by 1985 CCX
No tubes....
Why are they cracked? Aged?
Might want to replace if cracking
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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.