I might be purchasing a set of real OEM M3 wheels. The fronts will fit my wifey's 2003 325xi, however, the rears will not because of the staggered size. I heard that the rear fenders have to be "rolled". How is this done? I also might purchase a set of aftermarket E46 M3 wheels in 17 inch size which will fit all for corners (this is the ideal purchase). Is it possible to install those 17 inch up front and put the 18 inch M3 front rims on the back of the xi? So basically I would have 17 up front and 18 in the rear. I know I will suffer from increased tire wear as I cannot rotate. Think I should do that or go the easiest route and just get the 17's?