We've all seen the damage that rocks do to the inside of the rear wheels and brake calipers. I believe that the angle of the lower rear a arms is the problem. The front tires throw rocks and that 45° of the arm ricochets the rocks into the wheel. I've seen a lot of the race trucks, I believe mostly short course trucks, that used mudflaps underneath the vehicle to keep from throwing rocks and mud towards the rear of the vehicle. So I made up a couple for the Maverick to see if this solves the problem. They don't look the best maybe, but with how fast I drive nobody will ever see them anyways except when I'm parked.