Thanks for the feedback guys!
Mike, it's gotta be wider than 8", the tires are 10" wide, but you might be right. I thought the stamping might give a clue.
I did the off ground test on both rears, right tracked straight, left had a wobble. I'll try swapping.
Only thing I couldn't tell if it damage is on the outer wheel rim or at the hub.
I like the 'gauge' idea Shifty, will do that at the rim and hub.