Tried out some 20" wheels today.

[strictlypersonl]

Originally Posted by vatdevil

Your are missing the point. Choices for high performance COMPETITIVE DOT street legal radials are almost nill for 15s. Yea, there are the ungodly priced Avons, but the new generation tires will easily outperform them too. There are some decent drags radials, but have fun with them on high speed cornering. Tires choices are driving the larger wheel size. Sure, unsprung weight matters some, but keeping all four wheels planted trumps unsprung weight in my opinion. My lap and autox times greatly improved when switching to 18s...not because of wheel diameter....but because I could run better tire compounds and much wider (285/335) tire widths.

Looking through the choices in 335-35-17 tires, the prices are quite comparable to the Avon 15-inchers. Maybe they're both "ungodly".

[vatdevil]

Originally Posted by strictlypersonl

Looking through the choices in 335-35-17 tires, the prices are quite comparable to the Avon 15-inchers. Maybe they're both "ungodly".

Avon 295 50 R15 $470
Nitto NT01 315 35 R 17 $247
Yes, pricing is very close? I've run both, and NT01 produced better times with equal wear. (Track and Autox). Also run the NT01s on the street and wet weather. Too bad they arent made in proper 15 inch sizes. Moving up to 17 and 18 size, there are dozens of affordable high performance DOT RADIALS.