uneven tire wear on dolly

[plumberfrank]

i can't figure out why the tires on the tow dolly are wearing out uneven. it seems the inside and outside of the tire is wearing but the middle is good. i've check pressure-ok. towing behind class c e450. any ideas?

[Shellback1]

If it is not tire pressure too low, then check to see that the axel and tongue are at (90 degree) right angles.

[Elkhartjim]

There have been several posts regarding tire wear on some specific tow dollies. I towed a Demco Kar Kaddy some 30,000 miles+ with absolutely no tire wear. I've read others say they have worn tires out in a few hundred miles due to bad alignment. As I remember (scary), they had to heat the axle and bend it to obtain the correct alignment.

I don't know if alignment is your problem but thats the second place to look and you've already looked the first place...air pressure.

[Cougarkid]

What are you towing on the dolly?
What kind of tires are on the dolly?

Just because the tire pressure is correct doesn't mean they are not overloaded by the weight of the towed vehicle. Overloading any tire will cause premature/irratic wear.

Inside/outside wear usually indicates underinflation. If pressure is correct, then load is forcing tires to "buckle" under the pressure.