We're going to be testing the advantages of the factory 16x6.5-inch wheels and available R-compounds vs the optional factory size of 17x7 inches. SCCA's rules allow for any wheel that matches the factory dimensions (thus 16x6.5 or 17x7 are legal) with an offset that is within 1/4-inch of the factory amount. The factory offset is 48mm for the 17x7, which …
