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There is a difference between maximum(allowed) cold pressure and what most think is max pressure, pressure written behind AT on sidewall, or belonging to loadrange.
The pressure behind AT, will call it AT- pressure furtheron, is the pressure for wich the maxload is determined, for a speed , mostly max speed of tire, but not always.
The maximum cold pressure, is the maximum cold the tiremaker allowes.
The rising of pressure by higher temp in tire is all calculated in in the system, so no problem if pressure rises by driving .
Once read from one of the specialists here, that teststandards are used in tire-desighn, that they have to stand a pressure of 2 to 3 times the AT-pressure. This is for a AT 80 psi tire 160 to 240 psi!!!!!!
In earlyer days tiremakers allowed higher then AT , but nowadays not anymore.
But this all tells us, that you easyly can smuggle a bit with that AT pressure, if needed for laws of nature. Only dont do that with an already damaged tire by overheating , by using to low pressure for the load on tire,only once, then the mechanical forces that tear the beginning cracks furter, only get larger, and tire will fail sooner, and high pressure is blamed.
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