I am not a tire expert, but have been told that tire pressure and speed are big causes of tire blowout. I have had two blowouts, one on the MH (old tire)and another on the tow dolly (new tire). I routinely check my tire pressure, so I feel that the hotter it is the more likely you are to have a blowout. In both of my cases we were at highway speeds and it was hot when the blowouts occurred. One tire shop person told me that trailer tires are not designed to be run at more than 55MPH. If this is true, then when I am running at 65 MPH the tire would be getting really hot since it is rotating faster than it was designed for IMO. The MH blowout was my fault, I was trying to get one more short trip out of old tires I knew needed changing. JMO