Never liked ST class...started that dislike working part time as a tire monkey I while in college...but...IMHO...trailer tires see a very different road than the TV pulling it
Trailer tires take a different path than the TV...main difference is the inside tire taking a smaller radius...and...strikes stuff the driver doesn’t see/notice
Then, the fact that most all trailer tires are operated at max everything...max PSI...max weight...max MPH...
Plus...they are FORCED to twist, squirm, scrub sideways and a big...ETC...
Also...most all I’ve seen blown up...are the leading tire...which strikes whatever first...and the second trailer tire sees a slightly lesser force...
Few trailer tires are sized with the kinds of margin cars and truck tires...
Finally...folks used to think “Made in Japan” stuff was junk...it was...but the real culprit was the American firms who spec’d it on their purchase orders...the stuff the Japanese made for their other customers were really, really GREAT products...today, their “quality” is considered top notch
Same situation with stuff “Made in China” today...