This trailer tire wear pattern...

You are reading the sidewall wrong.
It’s maximum LOAD at a certain pressure, not maximum PRESSURE.

 

I have tire wear like that on the inside right front tire of my current trailer.

I just had the trailer serviced with four bad bearings. An ABS error led to the discovery of the bad bearings.

When the bearings start going bad, they allow hub wobble.

Hub wobble leads to the ABS tire speed sensors not working correctly.

Hub wobble also leads to uneven wear on the insides of tires, especially the innermost edge of the inside tire. While the tire wobbles and is not consistent in it's position, it will spend most of it's time at a slight angle.

Have a shop jack up the axles of your trailer one at a time. Do not loosen the lug nuts. Put on some gloves and try to push and pull the trailer tire back and forth like you are trying to pull it off. Use as much elbow grease as you can. The tire should not move enough for you to feel it. No bumping or grinding sensation. If you can actually see it moving, then it's seriously bad.

 

It says 110 psi to carry the maximum weight listed, it’s not the maximum pressure you can put in.

It’s also not necessary to have that much pressure if you don’t carry that much weight.

It’s a guessing game as far as correct pressure for all situations but if you are going to guess, the higher pressure is usually better.

 

First thing I would do is have someone in car follow you at highway speed checking out both sides of the axles watching for any wobbling of the duals.
Free and easy to do and then go from there.
I see alot of trailers on the road that have duals that seem out of round or the axle is flexing.????
To me,that has to create some funky tire wear.

 

It means exactly what it says.
Since you are running two tires(dual), you can safely carry 5675 pounds with that tire at 110 psi.
If you were running only one tire (single), you could carry 6975 safely at 110 psi.

 

An easy way to check for bearing wear is check the oil in the hub.Dark oil with a foul smell(like burnt onions)is a sure sign of bearing wear.Also rub some between your fingers,any kind of grit or any view of metal, tiny silver specks is a sure sign of bearing failure.

 

Stick finger down inside hole and feel for metal at bottom of hub cap. I caught a bad bearing once that way.

 

Any update?