I have a 97 2wd crew cab Dually. I have it on a 5/7 drop. 2" springs in the front with 3" drop spindles and a flip kit in the rear with helper bags for towing. I tow my 10k toyhauler to the desert and have no problems. I think I have factory tire size (225/70-16) not 100% sure as I am at work right now. But I don't hit at all, and just a little rub on full turn and a decent bump on the inner fender.