Do you mean ET14? The stock M3 rear wheel has a ET25 offset. A 15mm spacer would mean the M Roadster is effectively running a ET10 offset (25-15=10), which is even more aggressive than a 5 series.-TK330 said:I think the M-Roadster has an ET41 Rear... I may be off by a MM or two.
As far as I know... a 15mm spacer worked!?!?!?!?