The bearings are: #30205 25mmx52mm taper bearing
The seals are 30x52x7
Dustcaps are 52mm OD
northern tool stocks those i think …….if your close to one ?? Dont think you are ? Most trailers if keep them greased are not an issue !i wonder if those bearing #s are the same for my ultra-tow unit from northern tool. Mine are new but heading to fla. On thursday and a spare sounds nice. I guess i should have checked before i repacked them.