it really all depends on the backspacing of the wheel, a 5 and 1/2" backspaced will fit, but a 6 and 1/2" backspaced will hit the frame rails. I run 8" wide with 4 and 1/2" backspacing and 275/60/15 BFGoodrich Drag Radials with no rubbing, but my fenders have been rolled too. So that helps, especially if there are people in the back seat, which there never is except for my daughter and she don't weigh 25 pounds, so it's not a problem for me. I will probably be going to 10" wide myself soon, but with a 5 and 1/2 backspacing.