I imagine its got to be great fun, but turning curves so fast that your RV tips up on the two wheels on one side would probably cause the tire wear that you are seeing. ... Just sayin.
I was checking my air pressure yesterday and naturally put my hand on top of the right rear tire to assist with bending down and my fingers would not fit between the tire and the metal fender liner towards the frame. Hmmm. So I check the other tires and found a two finger gap. Tail of the tape to come
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08 Titan Crew Cab Long Bed with Big Tow
13 Surveyor SV 291
New Holland TC45
Polaris XP550