Thor Forums

[Peterrrr]

I know what it is like. Right now I can not find my multimeter, and of course I need it. May just go buy another.
Back to yours, I could see, if one side is not locking and with the combination of having the front steering locked once, any slight change in the direct plane would cause the irregular wear on the tires, when the towed vehicle is trying to get back to center and following the motorhome.
If the steering is not locked and one side of your tow bar is not locked, then when towing the front wheels could be offset from the plane the rear wheels are following with no additional wear, as the towed vehicle is following the MH off centre. Sort of like when you see a vehicle where the rear wheels are tracking off set from the front. I hope this makes sense.