I want to fit 10.5 inch rears to my sons 2014 M5 THERE SEEMS TO BE SOME CONFUSION REGARDING THE CORRECT OFFSET Any advice would be most welcome many thanks in anticipation
It looks like original options only went up to 10” wide with a 34mm offset, on that basis, and assuming you have enough clearance on the inner arch/suspension, a 10.5” wheel should be 40mm offset. But it really depends on what tyre sizes you use.