Here is what I am talking about you can see the abnormal wear on the outer parts of the tire. I would think if we bent the axle there would be other symptoms and both sides would be worn. Also if it was bent up or down only one side of the tire would be worn. If the axle shifted then there would be scuffing on both tires. We do not put much in the trailer besides a small table top BBQ the rest is just the usual stuff for camping. No bikes or large heavy items. Plus we travel most of the time with all the tanks empty.
I did notice that the inside of the tire almost looks like it has cupped wear pattern as opposed to just worn down. Makes me think it is an alignment issue but the way the axle is done from the factory I can't see how that could get out of line. I am going to check the bearings tonight just to be sure. I don't want to get a new tire and have the same issue next year.
I had a look at the axle under the trailer and it has a slight bend up in the middle. That seems odd as if it was overloaded the bend would be down. It is supposed be be like that from the factory. Unless we hit something major I am thinking that is what it looks like from the factory because if we could bend the axle up like that then it would have ripped the tank off for the fresh water that is right in front of it.