The regulations for ST tires differ from car and truck tires. The car and truck tires MUST have load capacity reserves. That is a mandated DOT requirement. There is no such reserve requirement for ST tires.
Most RV trailer owners are not accustomed to checking their tire pressures every time they get underway with the trailer in tow. They don’t do it with the tow vehicle so why the trailer?
There are excuses upon excuses for early RV trailer tire failures. You can write about it for hours and end up right where you started.
If you want to have any chance at getting a normal life out of your trailer tires you’re just going to have to dig in and learn about the specific ST design. Once you learn all the parameters you’re going to have to practice applying them. And sometimes that may not be enough. Because of the tire fitment regulations for the RV trailer axles you may have a trailer that came with tires barely able to carry the loaded trailer. They are legal but wont last long even when meticulously maintained. They will degrade really fast and fail.
Here is an example. I’m not picking on Keystone here. The information is on public display. It’s just a fact that most trailer owners don’t know. In this 2012 reference all units get the same sized tires, from the smallest to the largest. As long as the tires provide enough load capacity to equal or exceed the vehicle’s certified GAWR they are legal.
Look Here!FastEagle
