This trailer tire wear pattern...

Looks like they've been run low to me. What are they for tires though, i had a set of bridgestone 196s do that to me on a brand new hopper.

 

You have to run 120psi. Low tire pressures is the #1 cause of uneven wear.

 

If the tandem is a slider check to see if there's any play or wear between the rails.Also check the holes to see if they're oblong.A tandem moving side to side would cause that kind of wear.

 

Before you run the tires up to 120, make sure they are 16 ply. You should be able to find the MAX cold PSI on the side of the tire. 14 ply are only rated at 110psi.

I have this wear on many of the trailer (tankers) I service. We haven’t found an exact science for repairing it. Each trailer seems to have a mind of its own. We’ve fixed a couple with re-torquing the wheel bearings. Others we found the tri-functional bushing in the Hendrickson suspension wasn’t installed exactly right. And most times once the “River wear” starts you just can’t get it to stop.

If it where me, I would start with the easy stuff.

1. Check your tire rating and run what pressure is shown on the sidewall. Running max pressure shouldn’t be an issue unless your changing elevation and running over mountains.

2. Get your wheel bearings torqued to spec. In the rough off road, short haul conditions my trailers run in, we run them a little tight and recheck them often.

3. Rotate your the tires. (If needed) Try to reverse their travel ( to get ride of the river wear) and if possible move the wear away from the position that caused it. For example, if the Wear is on the inside edge of both left front tires. Swap them so the wear is toward the outside and the good edge is on the inside.

Hopefully one of these will extend the life of the tires you have.

 

Im with what others said about wheel bearings,but, Im thinking " wind and rutty roads played a role in wear.

 

Same here was told inside river wear exactly like this is telltale sign. Mine were so bad the trailer drifted rolling down road. If you watch mirrors usually can notice this drifting.