Originally Posted by JDelphiki
I'm currently looking at 9.5 ET45 in the rears. I definitely have a preference to the look of busy rims on BMWs, specifically the Breyton GTS-R, Apex ARC-8, VMR VB3, V703, V710.
45 is still a little aggressive if you truly dont want to do any fender work or aftermarket camber adjustments.
If you want the widest tires possible (265-275 rears), the best fitment wheels are the Alufelgen SF-71/CS7 line which come in 19" diameters. 18x8 et45 and 18x9 ET48 fit perfectly.
Also the Apex ARC-8 come in proper offsets of 18x8.5 ET45 and 18x9.5 ET62
There are only a few wheels actually designed to fit the rear fenders of the E82 platform. The 9.5 ET45 just so happen to "fit" with a little fender work if you want wide rubber and no rubbing.