I dont understand tires!

To answer your question. ST is Special Trailer. Built to withstand the large amount of pressure put on the sidewalls when making SHARP turns as we do when parking trailers.
LT is Light Truck. Built to handle heavy loads and highway speeds.
Hope this helps.

Sorry to hear of your mishap. Who had ever heard of Constancy tires. I swear I don't know what dung heap they get some of those tires from. That being said, we bought the Sailun S637 two years ago. We have about 18,000 miles on them and they still look new. And like Me Again said, with your weight you only need to inflate to 85-90 pounds. We runs ours at 85(12,900 weight when packed and ready to roll) and that seems to work just fine. The only complaint I have heard is that in some areas of the country they are hard to find.

Goodyear is also known for covering trailer damage caused by their tire blowouts....
If it matters to you, Goodyear Endurance are also made in the USA.

I assume it came with ST235/80R16E maypops. The new Goodyear Endurance ST is a good choice. Given the 14080 GVWR, the Sailun S637 might we an overkill. They are however a really good tire for the money. You would only need about 85-90 inflation for your load. If you inflated them to 110 pounds they would beat the trailer to death.

Fully loaded you will have less that 12K on the axles. A steel ply carcass tire like the S637 will add to towing stability and have a low rolling resistance.

Here is information on warranty and claims.

https://lionsheadtireandwheel.com/media/uploads/0/952_2015-Warranty-Claim-Form-Update-pdf.pdf