Both tires on the door side of my trailer are showing are showing quite a bit of wear on the outside two inches. The tires on the other side are wearing perfectly. I have one small slide on the door ...
"We noticed the tire wear problem like you noted and that was when Lippert was having to replace a lot of axles"
Check and see if you have Sealed Bearing Axles from Lippert? Those worthless axles should have been recalled. Lippert was no help and all they wanted to do was sell me new axles.
I now have Dexter axles and Dexter will work with you and they have parts and they know what they are doing.