Originally Posted by MVA
I replicated the same measurement across my tires. Sent Dexter some pictures of this measurement and paperwork; Dexter sent me an axle.
Yes, they may ask for some measurements or ask you to take it to a service place.
In my case I put a laser on each hub pointing forward to a piece of wood running side to side at the trailer hitch. In my case the toe-in was the same for 3 of them but the one with the tire wear was different.
In this case I'd measure the distance from the wheel hub forward to either the hitch or a transverse piece of wood. The bolts are slotted and this case, with wear on diagonal wheels it may well be that the axles aren't aligned.