I've ran nothing but LT tires on all my rv trailers and GN trailers in commercial service starting in the early '80s.
For trailers with 6k or 5.2k axles the Michelin XPS Ribs and Bridgestone R-238 are a commercial grade all steel carcass tire.
The LT235/85-16 E @ 3042 lbs 80 psi in above brands gives a tandem axle trailer 12168 lbs capacity.
Your trailer in sig shows to have a 12250 gvwr ....less 2500 lb hitch weight on the truck leaves around 2500 lbs on each tire. Plenty of reserve capacity per tire.
LT poly carcass tires I've used in a LT235/85-16 E are;
Cooper Discoverer HT-3
BFG Commercial T/A 2
Firestone Transforce HT2.
Tires above are recommended by their mfg for trailer service per email/1-800 to me.
For trailers with 7k-8k axles the all steel carcass commercial class Sailun S637 in a ST235/85-16 load G 110 psi at 4400 lbs per tire capacity are top shelf.