Before you take the wheels off, measure from the fattest part of the tire bulge, on the in-board side, to the inner wall of the tub. Do this with the wheel at normal ride height. And do both sides.
I am pretty sure that the only issue I have is the tire is rubbing the lip of the opening of the wheel well, the opening is 19" and the tire is once in a while rubbing the opening not the inter side at all.
