Lookin for some new shoes for my 2000 S4 and I need to figure what will fit in my wheel wells. Ideally I'd like to do something like 19x8.5 front and 19x9.5 rear; is that as big as I can go without fender modification? Also what is the widest tire I can fit (ie: ???/35R19); is 235 the widest I can go? So many questions!!! HELP ME!!