Originally Posted by Lewis@MWDesign
The proper size is 20x9 F 20x10.5 R - that is the spec we are going with for a customers M3 and recommended by HRE as well. 11s will not fit.
20x8.5 F 20x10.5 R is a big width difference and may cause unwanted understeering which might compromise the handling performance.
Is that the setup I'm going with as well?