I have a 96 tracker with 2.5 inch back spacing on my wheels and run 235/75/15 MT's. I also have a 2 inch body lift. I have no rubbing on the frame. Had to use a air hammer and beat back the bottom of the body around the wheel well next to the doors (cant really tell it unless you look real hard). I dont know if you go with a all terrain tire if it would rub. My mud terrains have large cleats on the tire!