Yep
I have a big Tex trailer with their proprietary 5 on 5 “
Which means you buy the spare wheel from them and no one else .
I also have an old trailer that my dad bought used in the early 70s
With the 4 on 9” bolt pattern
Trying to find a spare wheel and discovered they stopped making that...
Check out northern tool or tractor supply
They new tires mounted on new wheels are reasonably priced
Usually cheaper than buying new tires and having them mounted .
And Any used tires you get are going to be old and dry rotted