That’s the opposite of how that works.
Tires are a gauge pressure, meaning pressure vs ambient pressure.
14.7 psia (absolute) at sea level. And getting less as you go higher elevation.
12.7psia ambient is ~4000ft elevation 10.7psia ambient is ~8500ft elevation
So if it you start at sea level with 40psig in your tires, when you get to 8500ft elevation and measure the tires you’ll be ~44psig.
If you start at 8500ft at 40psig, when you get to sea level they’ll be ~36psig.





Hey, finally one prompt where “remind me later” ACTUALLY fits.
Everything else needs a “don’t fucking ask again” button.