I am running 17x11 with 315/35/17 nitto NT05Rs in the back. My fender lips are rolled and my frame is notched. I have not modified the tub yet but I do need to. On steeper inclines when the rear end get cocked I get rub on the inside of the wheel tub. I screwed up and have 6.25" BS and am running a 1/2" billet spacer for 5.75" BS. I wish I had 5.5 BS with no spacer and I think it would be perfect without any modification being needed to the wheel tub.