most times you can go to Walmart, or Tractor Supply, or RV dealers...and buy trailer tires already mounted on rims, for about the same price as a bare tire.
I bought (2) new tires on the jungle website for about half of the cost of (2) tires on rims.
Plus I wanted to salvage the old rims because they had red & blue pinstripes on the white.
The machine I carry around on the trailer is American made, if you can believe that.
Only seemed fitting, plus I was in the tinkering mood LOL.