I have 18x9s on all four corners of my 2K GT...stock ride height. The left front tire (255/40zr18) rubs a bit on full left lock, but that is the extent of it...no real issue. I've seen comments on the 18x10 rears (but probably tire size dependent) indicating they may contact the quad shock and the rear fender lip may need to be rolled for some suspension combinations.
