Sponsored by The Tire Rack

[VMRWheels]

Originally Posted by bmw1racer

Just go square with 225/45-17s all around... The 7" front wheels (7.5" in the back, FYI) should handle the 225/45s with no problem.

+1

Good advice.

[SHKDOWN]

Originally Posted by VMRWheels

+1

Good advice.

Thanks for the responses!

[Wakka]

Originally Posted by roundel335

I upgraded the wheels/tires on my wife's 2011 128i M-Sport convertible from 17" to 18" - specifically 18x8 with 225-40 in front and 18x9 with 255-35 in the rear. Really helps the handling and ride, and the 18" tires are non-runflat (we keep an M-Mobility kit in the trunk).

I have the same wheel/tire size just on enkei rpf1's. Fitment is good and definitely made the car feel infinitely better than the 17" RFT's.