Originally Posted by Dupdyke
That rating is for a new tires and at 70 some degrees. You put 40k lbs at 95 degrees on six tires and run over 75 mph for a while. Stop and look at the temp of the tires and take out more life insurance for your loved ones
Are you sure about that? Sincerely, I don't know if that's right. The tires are given an inflation pressure "cold." As they heat up because of road temps and friction, the psi actually goes up a significant amount. This actually helps counter the increased softness of the tires that occurs because of the heat. The speed rating, I believe, is given at a predetermined cold inflation pressure and load rating... and has little to do with the temperature of the tire at operating speed? I could be wrong...
I just looked... my tires are rated at 75mph. Of course, without an engine, they might as well be rated at less than 5mph . lol