Having access to shop machinery we ran some trailer wheels on a big engine lathe. Ran four 14" and two 15" and a set of 16" for my tri axle flatbed.
All were new still in the shipping box. The bead seat flanges on all the wheels were way out of radial and lateral specs for automotive wheels.
Several reasons a savvy tire shop doesn't recommend balancing a tire on a trailer.
My neighbor had his 38' GN triaxle horse trailer tires balanced. The tires had no weights from the factory so not familiar with trailers he thought they should be.... and dropped by a tire shop and had them balanced using a lug adapter.
The trailer shook his F350 drw crew cab long bed all the way home. He dropped by my place and said no shaking before but only after balancing. I found three wheels that had two 4" long weights next to each other.
He decided to remove them. He got his smooth ride back and learned a lesson.
Cheap tires...no as these were LT235/85-16 E Michelin XPS Ribs on 6k axles.
Those 26-28" long trailer springs act as a huge damper.