Originally Posted by paintpro21
The rear fitment will be tight. We have not tested this combo. There's a good chance it would clear by a few millimeters, but a roll may be needed. We have a local customer with a non-m. The next time they are by the shop, we will test this fitment.
17x8.5" ET40 with 235/40/17 is a very, very easy fit. Even 245/40/17 is an easy fit front and rear.
The most conservative setup I would run on the non-m Z4 is 245's on 17x8.5's.
Thank you very much paintpro... Looks like i'll have to wait until my existing 225 PS2's are worn out before switching over :-) My only remaining question would be, you said 245/40/17 where the 17's aspect ratio is usually 45 (like 225/45/17 i run now). Would a 45 be fine, or do you indeed mean a 40 is what is needed for this setup. Don't mean to nit pick, just want to make sure i have my numbers straight when I decide to pull the trigger on this buy.
Thanks once again, awesome looking wheels.