riven1950 wrote:
Not all ST are 65mph rated.
Just bought a new TT. I was surprised to see they have a speed rating of 75 mph, rated as L I beleive. Can't remember the brand but they are ST, and yes, made in China. BTW I have no plans to test the speed. Usually towing 60-65 mph.
That's true but the load on an ST is higher than the load on an LT. Physics doesn't change. The main difference in the load numbers is based on ST formula written for 65 mph MAX.
There is no magic involved in placing the letters ST on a sidewall instead of LT.
If you want to run your tires like they were LT then the LT loads are what you should be using.