You sure don't need a load G tire at 4080-4400 lbs capacity on a trailer that size. A one ton DRW to tow a popup comes to mind. More capacity above a 10-15 percent reserve above your axle ratings isn't needed.
Your 10200 gvwr trailer may have around 2000 lb pin weight leaves around 2000 lb load per tire.
If your wanting a commercial grade tire why not the Michelin XPS rib or the Bridgestone R-250 in a LT235/85-16 E or LT245/75-16 E at 3042 bs capacity. Both are a all steel carcass and are tops for trailers with 5k-6k axle. In fact Michelin advertised the XPS Ribs for commercial trailer service.
Or trailers like my 11200 lb 5er with 5200 lb axles. I use LT 215/85-16 E at 2680 lbs capacity. Ran the first set at 55k miles and 53k miles on the 2nd set. No issues.
Have you looked at the new gen ST tires like the Providers....Goodyear Endurance....or Carlisle new HD with the higher 81-87 mph ratings. Higher speed rating on a load carrying tire like a ST or LT are more about coping with heat at highway speeds.
