I run 17x8.5 for my daily wheels, but I am looking at some 15x9.5 for autocross wheels. Have Tein Flex and wide fenders and have done calculations for width, but will 15's clear the Turbo brakes? I thought I have read about this somewhere but I can't remember where.

 

yes they will clear the stock t2 brakes no problem.

 

With ease no doubt.