Unusual tire wear on rear

[Azhoppy]

I tow a large 5th wheel, GD 348M gross weight 16500, truck is rated for max 17500. I noticed my rear tire wear on the outside edges. Checked tire pressure and it’s correct. I’m guilty of not rotating my tires since I bought this set of tires and only towed about 1500 miles on them. What could cause this unusual wear?

[MoonShadow_1911]

I tow a large 5th wheel, GD 348M gross weight 16500, truck is rated for max 17500. I noticed my rear tire wear on the outside edges. Checked tire pressure and it’s correct. I’m guilty of not rotating my tires since I bought this set of tires and only towed about 1500 miles on them. What could cause this unusual wear?

Is this on the tow vehicle or the trailer?

[traveldawg]

I tow a large 5th wheel, GD 348M gross weight 16500, truck is rated for max 17500. I noticed my rear tire wear on the outside edges. Checked tire pressure and it’s correct. I’m guilty of not rotating my tires since I bought this set of tires and only towed about 1500 miles on them. What could cause this unusual wear?

Sounds like another candidate for an axel alignment. Find a good shop and they will tell you exactly what is going on (bent axel, out of alignment, bearings - whatever.

It happens a lot on trailers. So don't feel alone.

[Calbar]

I tow a large 5th wheel, GD 348M gross weight 16500, truck is rated for max 17500. I noticed my rear tire wear on the outside edges. Checked tire pressure and it’s correct. I’m guilty of not rotating my tires since I bought this set of tires and only towed about 1500 miles on them. What could cause this unusual wear?

I had rear tire wear on my 378MBS and Dexter replaced the rear axle. I could also tell that the trailer was not towing straight. After the axle replacement trailer tows straight so hopefully this fixed the tire wear issue as well.

Rob