But that pressure-rating was yust what suprisingly was not that important, only the maxload/ loadindex of tire.
But then again , it was sayd to you on telephone by a lady, and not a man
Do you also know the maxload of rimm?
And a stiffer tire needs higher pressure for same load. Have to search for European lists of same sise tire, but if you would calculate the loadcapacity/psi lineair , as some do, and is in fact not that bad, the G-load lower loadcapacity/psi then the E-load.
So if you dont overload the 4900lbs GVWR ( only weighing will prove that), you need the about 90 psi, I calculated in my first post here, to give it the reserves it needs , for higher speed then 65mph, unequal load R/L, and inacurate pressure-reading, etc etc.