Originally Posted by edirtaynine
whether you do 10 or 12, you're going to need to roll the rear fenders once you drop the car.
that being said, since you'll have a little more space after rolling, that's why i suggested wider tires at least 265 and only 10mm spacers. if you're going for that flush look, then just push those wheels out more with a 15mm spacer and keep the 255s.
Back when I had a brief stint with my m359's, I had my fenders rolled to try and fit them, but the tires were too big and I couldn't get them to stop rubbing. However, I was never sure what to expect with a fender roll, so I'm not even sure if they did a decent job. I'll post a pic for you to check out in a second.