Originally Posted by mightyaa
Ok, I've searched around and come up with the stock settings. But it'd be helpful if anyone knows the additional clearances you have with stock settings to figure out maximum wheel and tire sizes. The E90 post section has a nice calculator, but it's meaningless without knowing how much extra space you have before rubbing with upsizing. I'm looking at this from a track setup where I'd like to put a lot of rubber under the wheel wells and pick a wheel/spacer solution; difficult atm due to both tire and wheel limited selections.
As I understand it, the E90 M3's are setup like this stock:
Front: 18x8.5-ET29 running 245/40r18 OR 19x8.5-ET29 w/ 245/35r19
Rear: 18x9.5-ET23 running 265/40r18 OR 19x9.5-ET23 w/ 265/35r19
Bolt pattern is 5x120
So, does anyone know the clearances from the stock settings to the strut tower (inside) and to the exterior wheel arc (outside)? With those numbers, I crunch out the rest to figure out a combo that works.
TRMotorsports 18x10 inch will fit all around with 285/30/18 BFG R1 all around, no rubbing. Offset: 25mm Backspacing: 6.41" Used for 6 track days. Really nice set up But could use 10.5 or 11 " rears with 305 -315