Purchased to new trailers. Both were loaded to max GVW in excess of 10K. Both experienced OEM ST tire blowouts/failures while traveling rough sections of interstate highway. Tire pressure was at max PSI in both cases.
Upgraded to LT tires in both cases and my tire issues magically went away.
ST tires are marginally rated and not designed to the same criteria that a LT tire has to meet.
ST tires are not designed to carry live passengers and thus are made to meet a lesser standard than passenger rated tires.
Call me naive but I just don't believe the root of all the ST tire failures are operator error.
These same operators must wise or just get lucky when they upgrade to LT tires and their blow out issues go away