The rear tires on my Fifth wheel are wearing on the insides edges of the tires. The right side tire has worn to where the wear bars are flush with the tread. The left side tire no tread or wear ba...
The rear tires take the brunt of tight turns. They're pretty much dragged all over the place vs the fronts that have no extra stress on them. The fronts are like the axle and tires on a utility trailer, they just follow the truck.
I'v had those wear issues on 3 trailers I've owned. All 3 had different axle manufactures. AL-CO, Dexter and Lippert. Everyone needed an alignment at around 10,000 miles.