I'm running stock tire size and 9.0" ET 35 in the back. pretty aggressive roll on the fender and lowered... rubs on the plastic tab over big bumps... the thing that makes a lot of difference is the tire itself. Definitely different brands of the same size tire have different widths. Also, the more negative camber your running in the back, the more clearance you'll have.
Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
H&R sport springs, UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers