I am running 18x9s on the rear of my SC with 235/75 tires and a 36mm offset. The car is lowered with Eibach springs. When I first installed them, they rubbed the fender lip in the rear whenever the car suspension would compress. I added air bags to the springs and kept them inflatted to stiffen the rear suspension. No problems with rubbing now. I am thinking a ten inch wheel would be too wide unless the fender lips were rolled and even then if the tires stick out past the fenders, you are guaranteed to chew up your tires.