Primewell ST tires

My last trailer had 14" wheels, the current one has 15". With these two wheel sizes, the choices of tires with high load ratings and quality construction are very limited. The first thing to have to check to make sure the load rating of the wheel on you trailer can take the extra pressure of the higher pressure tires. After lots of research over the years, I think the best choices for 15" tires are:

The Maaxis M8008 comes in load range E (80 psi) and is a very well respected tire. There are a few other manufacturers that offer a Load Range E ST tire, but Goodyear does not seem to be one of them.
Goodyear does make the Cargo G26 which is rated for "all position" including trailers and comes in 225/70R15 size which usually fits instead of 225/75R15. This tire is sometimes used on the euro-style (think Sprinter) vans, and is made in Europe. It is a well respected tire on various RV forums and at 65 psi, has a capacity of 2,470 pounds.

Let me guess: they're cheap. Pay now or pay later.. your choice.

How much camping do you do? If you only go out 3-4 times a year and don't put very many miles on it, then those tires would probably be ok.
OTOH if you tow a bunch you'd be better served with a brand name tire.
FWIW there are so many brands out there for ST tires it's almost ridiculous.

Here's a link to a site that has all those goofy off brand names.
http://simpletire.com/trailer-tires

Another fly by night name for some cheap junk. Your choices really should come down to two brands. Maxxis and for the life of my I cant remember the other.