[jmlloar]

First thing I would check is distance from inside and outside of wheel well to sidewall of tire on each side. next check to see if outside edge of rv is the same distance from the frame. ( might be square or even, but could be slightly off center). Since its rubbing inside you can always do a quick fix by adding a small wheel spacer to move wheels slightly outboard. One side only is needed since you wont notice any difference in ride or handling by adding a 1/4" or so wheel spacer.