[Yetiman]

The reason for buying Yok Avids is because they are arguably one of the only decent tires available in 15" sizes.

When you get to 17" tires, there is a wider assortment of much higher performance tires out there.

In 17" sizes, I have personally used a number of different high performance tires (on cars other than the Cobra) and can highly recomend both the Dunlop SP8000 and especially the Good Year F1. Both offer staggering performance levels, and the Good Years even seem to have both a better ride quality and higher latteral G performance than most.