Now I am really confused.
I think the only sensible reading to put on the sidewall is the cold rating . No one is going to weigh each axle and adjust tire pressure as a function of temp and weight, that is absurd.
One has to assume there is a significant safety factor on over-pressure on this reading and that the over pressure that is created by heat will be within that margin.
I have an uncle that invented the run-flat tire (sold the patent to a giant tire manfuc) The testing for this tire was like 12 years. (Believe it or not it stemmed from research used to develop the wheels on the lunar rover that drove on the moon) We use to joke that he was "re-inventing the wheel" (an engineering joke) I will ask him, maybe he knows what the safety factors are, I would bet they are at least 2X the sidewall rating.
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