Bizarre trailer tire wear

really looks like trailer axles need ajustment, but check axle ajustment using kingpin as center, so u need workshop with lazer system

i have euro trailers with tridem and single tires, they are more sencetive to ajustment so i have to check every year

 

Check the hub to see if its warn where the rim rides if warn your tires can get mounted off center if worn on hub or rim will need new hub or rim usually caused from loose lug nuts

 

Mismatched tires on the same hub are problematic. if you must run unlike tires beside one another, be very careful to check inflated height side by side. If one is slightly taller put it on the outside.

 

My money is on the height.
It is a good practice to put duals against each other and check height before you mount them.(back to back)

 

Have you checked to make sure tire is centered on rim? Have seen many tires shops put tire on outside and never take wheel off 50% of the time tire will be off center. Easy way to check is there's a thin line on sidewall right at rim,just check gap

 

This is the exact opposite of what you should do. The slightly taller tire goes on the inside as it is more likely to be running in the deepest part of the roadway ruts.

To the OP, wear on one part of the circumference is caused by something on that wheel end, most likely an off center tire mount, possibly the on the inner, too.

 

Trailer axles are built with positive camber to fit the "crown" of the road