Have you seen tandem tire do that?

Did you put the right bag on? Why didn’t you replace them in pairs? You changed one bearing but not the other side? If you half *** repairs, nobody here can logically guess what’s going on.

 

halfass is not too offensive. It's a professional term that quite easily summarizes repairs that aren't. It's way better to fix stuff in pairs on a big rig.

 

I wonder if a loose bearing could cause that. Thinking of how I’ve seen wheel bearings wear on the sides when loose.

 

Like ridgeline said check bushings, too. When they’re real bad trailer will sway a lot in the lane.

 

was ran flat or low at some point. once the irregular wear starts your never get rid of it. replace both tires.

 

Cranky huh? I’ve been given wrong parts many times. Changing both parts on an axle is a pretty much standard procedure. If one bearing is bad, most likely the other one is too or will be shortly. Same with shocks, airbags, brakes, etc.
For instance, you have a new airbag in spec and an old stretched out airbag. They’re pressurized to the same pressure, but the new one will be slightly higher. Keep on doing it your way though.