I assume you are rubbing the top of the tire on the fenderwell.
If it is rubbing the sidewalls inside, you can use spacers.
I am running 275-40-with 20 inch wheels and I don't rub the tread on the rear.. even after notching the frame with air bags deflated. the front would rub if I didn't have stops installed.
Last edited by gazim; 07/06/2010 12:18 PM.