I used 12 mm out back and 15 in the front, but i have a convertible M8 with factory wheels and Michelin tires.
Im sure it will be different on an M850i.
Here is a post of someone recently doing spacers an M850.
Doesn.t seem to be lowered though.
Same size spacers but switched from front to back.
Quote:
Originally Posted by bojler
I have H&R spacers 12mm front and 15mm back on M850i. When wet, rear side gets more dirty when compared to the stock.
Sorry for the bad angle, don’t have better pic.
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