Hey this is really close to the issue I'm having right now. I have a set of 2002/e21 BBS Mahle's I'm trying to fit. They're 15x6 ET13 with 205/50/15 tires. With no spacers I had a clearance issue with the front brakes, but rears did not need any spacers. I put a set of 25mm spacers on because they were the only ones I had around. The fronts now clear no issue but the rears rub against the fender during hard cornering. This is all on stock suspension.
What I would like to do is run the minimum possible spacer on the front to clear the brakes so I can take the spacers off the rear without it looking silly. I might add smaller spacers to the rear later on but for now I just want to be able to go around a corner without worrying about cutting my tires. Any insight?