I have a stock 335i with sport package and just put on 20 inch rims and tires and have had no trouble with rubbing and they JUST fit inside the wheel wells.They handle and ride much better than the run flats,now if i can get them to tweek the balance I will be happy as hell with the set up.The actual sizes are as follows:
20x10 Beyern medium offset rear
20x8.5 " " " front
255/30r-20 92w Toyo Proxes
Im sorry, i had already posted this info but not on this thread.And I dont now what mediu offset is for sure but will find out saturday when I go back in to have the balance tweeked.