Most trailer tires these days are made in China. That has been a great downfall in quality according to two tire guys i dealt with in the last two seasons. 2 seasons and two blowouts. One was Goodyear marathons which (used) to be considered decent tires and my other was a Carlysle. Both tires Made in China. Kinda hard to avoid, but if you can this is one thing to watch for.

The other thing i have really learned is KEEP pressure up to max or near max and something i also learned and i feel this has made a huge difference is to have the tires BALANCED. All 3 of my factory tires, which included my spare were not as for my first replacement as well. Since then tires are pumped full\balanced and they are trailereing better than ever. Fingers crossed....