[why?]

Originally Posted by rvoll

I have Kuhmo's on my other car, an SUV, and they are fine, but average. In my opinion, on a sports car I think of the tires as the most important thing you can buy because it affects handling, stopping, and ride quality in both dry and wet scenarios. On an SUV with average power, Kuhmo's are just fine For our sports car, I'd want the best I could afford. If you are going to track your car, don't buy anything but the best, if for no other reason, safety. I changed my Primacies to PS4S the day I took delivery of my car. But it is expensive to do so -- about $800 in my case. By the way, I got a better deal on these tires from my local Discount Tire store than TireRack.

Kumho used to be some of the best tires for track and autocross. Not sure how they fare now, but just because they are inexpensive does not mean they are bad.