I see so many comments on tire that leave me more confused. I have ST235/80r16 tires. I pull a 2010 Open Range 337 RLS. GVWR 12,500. Can I get a recommendation. Marty
If those are the OEM tires it's time to retire them and be glad they served so well, others have not been so lucky.
You conceivably could run a 16" "E" rated LT tire and be within load weights. Sailun are excellent tires and what I have on my toyhauler, but may be a bit overkill on your trailer. It kind of depends on what the rating of your axles too.