it's mostly dependent on the offset and width of the wheel. but I can tell you this, I run an 18x8, 40mm offset, 225-40's, they rub. a coworker of mine has the exact same wheel (not same dimension, but the exact same wheel), running a 215-40, and he tells me (i have not checked into this, ie: gone for a ride in his car), he doesn't rub. we both have SVT contours, both with H&R springs, both with TD DTM's.