I have 7.5 X 17 RS7's on my s2. Lowered 25mm on PI shocks n springs. It catches with 3 up, on dips, otherwise ok.... I never have 3 in the car anyway so it dont bother me, I have had no work done to my arches. I helpful hint that I found out was to use spring assistors in the rear springs to raise the arse a little, helps on the bumps too, now it dont catch at all