I just bought my new GT a few weeks ago and I just picked up a set of the FR500 wheels with the staggered setup. 18x10 in the rear with 18x9 in the front. I want the back tired as wide as possible. Does anyone know whats the most width I can go on the back? My buddy has an '02 with 325's in the rear, can you go that wide on a 2012? Thanks for any help!!!