Odd tire wear

Low air pressure!

Maybe out of balance

I read mismatched pressure or diameter.

They are the same tire brand/size.

Out of balance AND under inflated. It's a combination of both:

Here.

It is a combination of under inflation and cupping.

Cupping is caused by being out of balance (or) a result of bad shocks, bad struts. Read here. This explains a lot more.

Carlisle tires.

What kind of trailer is this? Semi? Tandam axle? duals? Spread? Looks like your dragging the tires through right turns.

Took RV for tires and had balanced. Did not drive RV for long time and ended up at another shop to have checked due to vibration. Guy comes back in office with a huge handful of wheel weights and asks who balanced my tires as they have absolutely no idea what they are doing! I know they were my weights as I had painted rims and they had paint on them, all of them.

Use this shop exclusively now for alignments and such, RV will not fit in bay so they align it in the parking lot. Also do tire shaving for out of round
tires and they are reasonably priced. Alignment is $59

West Coast Alignment, Ft Myers FL.

Suspension bushing need replaced, axle is walking around from worn out bushings

N-Trouble wrote:
What would cause this odd wear on only the outer tread blocks?

The cupping (or feathering) uneven wear pattern on both edges along with much less wear in the middle is usually an indication of significant under-inflation.

How OLD are those tires ?
Looks to me like they might be PAST due for a new set.