In Reply to: M Rear wheels fit rear of 1.9!!!! confirmed. posted by wannaM on November 09, 2000 at 14:59:06:
In my efforts to convert my Z3 1.9 to visual M Roadster specs (grateful for all your help fielding my interior conversion questions), I was worried about the M wheels on my car. Seems like everyone knows that the 2.8 makes the M wheels stick out about an inch when running rear M wheels in the rear of the 2.8. I was concerned because this would not allow me to use real M rear wheels and have to use the 8.5inch wide front M normal-offset rims. Bummer. Upon further research, I found out that the 1.9 rear track width is 1.3 inches wider than the M roadster's, BUT 2.5 inches narrower than the 2.8. Thus, the rear M wheels will fit naturally into the wheel wells on the 1.9 without the protrusion problem of the 2.8 ASSUMING that the owner replaces the original 1.9 fenders+ with the wider 2.8 fenders... which I plan to do when I scrape together some money.
is it worth it. why dont you just go 17inch.all around.and if you want to go wider in rear add a wheel spacer..have m rims on my z3 2.3.2000 17.5 all four. looks great..and didnt spend over 5 "G"s