Check your tow dolly bearings
I made a stupid mistake, and that was taking someone else's word for maintenance. Bought a used tow dolly, family was getting out of the RV lifestyle (he had a 40' sailboat parked out back in the canal-that was his new love).
He said he had replaced the bearings, had recently replaced the tires. Well the tires looked almost new, no worries. Took the dolly out on a 2600 mile trip. About 2/3 of the way, noticed real bad wear on one side of the tow dolly tires. Jacked up the wheel, wheel moved on the axle. Studs were tight. He hasn't properly tightened the bearings, wheels were wobbling.
Didn't have the tools or inclination to deal with it, headed home. Took about a half hour and a part replacement (bearing cover) but correct now. But it cost me a tire, dang.