My rv gets the least amount of use out of all my trailers . But it runs at the highest speeds and longer distances . It has LT tires . my poor experiences with ST tires are all local , short runs , under weight and rarely over 50 mph . I have had numerous treads fly off , disformed tires , tires blow out while parked at the shop just sitting there . I use to run ST tires because thats what the tire store recommended . But after going thru 8 , and 10 tires a season I got fed up ( gets expensive). I started to switch over to LT and even P tires depending on the trailer . I havent had a problem tire since then . I have had nails in tires ( easy repair). I have even worn trailer tires out , something that I havent done in a long time. Is this scientific ? No just real life experiences from someone who uses trailers just about every day for work. Most of the other contractors I know have done the same thing for the same reasons ,the ST tires dont last .