I understood that moisture in air causes no significant departure from the ideal gas law under normal practical driving conditions. When that is pointed out, all sorts of other reasons surface like causing rust on the rims or the tyres rot out on the inside which in itself is a load of rot or it rusts the steel cords or... or... .
The bit about using nitrogen in normal car and truck tyres gets shot down every time it is raised so I don't know why it can't stay dead.
As for the actual pressure inside a tyre. Couldn't you make an argument that if you go up in altitude, the air pressure is pushing less on the outside of the tyre so the tyre becomes effectively over inflated - but high altitudes are usually associated with lower ambient temperatures which reduce the running pressure, thus mitigating any altitude effects.
Then again ....
or maybe even .....
Just ride.
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