My motorcycle trailer needed tires. The motorcycle trailer had "old" ST 4.80-12s and the new Sea Doo boat trailer had Loadstar ST 5.30-12s. Decided to steal the boat trailer tires & install on the motorcycle trailer. The 5.30-12 is wider & larger diameter than the 4.80-12, so had to adjust the motorcycle trailer fenders for clearance.
Installed Loadstar ST 145/R-12s radial tires on the Sea Doo trailer. The Loadstar 5.30-12s that were replaced, are close to the same size, diameter/width, as the Loadstar ST 145/R-12s, so no fender adjustment needed.
Interesting note, do not have a wheel adapter to static balance automotive style wheels with a No-Mar motorcycle tire/wheel static balancer, but found both trailer's wheels turn free enough to static balance tires with motorcycle stick-on weights when installed on the trailer. No brakes on either trailer. Have not balanced them yet, but will take care of that job later this week. In both cases the trailer tires installed yesterday have higher load capacities than the trailer tires they replaced.
Breaking the bead on a 5.30-12 tire:
Installing Radial tire with No-Mar spoon:
New ST 145/R-12 installed on Sea Doo trailer:
Cycle Hill Tire Stand: