is350wh

My boss has an '08 M3. It has 255s on the front. They look great, and the handling is (obviously) incredible - not due to the wheels, per se, but they certainly aren't hurting anything.

Can the rear F-Sport wheels (19x9s) be installed on all four wheels of an IS350?

How would that change the steering and handling?

Is there enough room under the front, or would this cause rubbing?

Has anyone out there done this?

IS-SV

In front, a tire over 235 will usually rub.

No motivation to have same size tires and wheels on all 4 corners, except to be able to rotate tires.