When I replaced a bad trailer tire before towing my boat to it's new owner, I put on a steel belted radial. The GoodYear store didn't have a standard 'trailer' tire, so sold me a regular tire.
My suggestion is that if you travel long distances, get better tires in the first place. Trailer tires are generally cheaper bias ply tires, not steel belted.
Secondly, I now routinely check my trailer tire pressure at least once a month. Bad pressure, as mentioned above, will ruin one of those tires quicker than anything. Another point is that quite a few spare trailer tires have probably dry rotted from lack of use. Not all that surprised that it went.
Tex