I have replaced the original tires and wheels (7.5 X 16 with 225/50-16) with 8.5 X17 mounting 245/45 X17 tires on the front and 9.5 X17 with 275/40 X 17 on the rear with the proper rim offsets. The fronts wear perfectly but the rears wear out on the inside with noticable cupping. My mechanic as well as the dealer say there is no camber or caster adjustment possible on the rear.
I have run the tire at recommeded pressure both front and rear and have even increased the rear pressure in an attempt tp place the wear point towards the center of the tire. Any ideas or comments.