This is a follow-up to my previous post. I am now on my second set of Cup tires and still think they are the best I've ever driven. As I predicted, my first set lasted about 1000 very hard miles (four track days and about that many auto cross events). I really can't say enough good things about these tires but I can tell you that they allow me to drive my Corvette way over my head. Empirically, I can report that my previous PS2 tires would register 1.1 g's after a run on my local track while these Cup tires consistently pull 1.3 g's on my meter. Problems: I've had a difficult time getting fresh tires (I refused 3 separate sets of rears that were three years old). Also, since ZP tires seen to be hard to mount, the last set had to be taken to three different (national brand) shops before the job could be completed. Still love 'em.
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