Long overhang and dragging hitch delima--solutions request

Our Class A (a 32-footer) had about 7 ft rear overhang. The original owner, from whom be bought it, had put wheels, maybe 6" diameter, close to the outer ends of the rear bumper. On the odd occasion we encountered a step in the road or a curb when entering a gas station, the wheels would hit just before the bumper would have grounded.

They probably struck maybe 6 times in the four years we used the coach.