The problem that I have is I am running 255/60 series BFG tires and they run the outer lip. I looked behind the tire next to the frame and there is at least 1.5 inches between the sidewall of the tire and the frame itself. My car has aluminum drums and this helps in pushing the tire out toward the wheel opening instead of the frame. Before I put the new wheels on I am going to measure the actual B/S of the ones I have just to be sure that they are correct, I don't see them being wrong but stranger things have happened. I don't want to have to pump the airbags up and make the tire work and the have a not so smooth ride on the street.