Ah ok i see, right well the rears cant be rolled, there isnt anything to roll really, you may be able to put a slight flare on them, but the rears are wide enough anyway, the fronts can be rolled as they have a lip. but as Dan said you run the risk of cracking the paint. For 9j on the front i would say your gonna have to roll the arched but im not 100% may have to wait until i have my X5s fitted to find out, mind you i had them on today at the fronts and had them running flush, pics are in my other thread