How do you calibrate a tire pressure gauge?

[shmike]

Originally Posted by askmrjesus

That makes sense. All that really matters is that you get the same reading everytime the air pressure matches. If the gauge says 33.5, and you like how the tires feel, 33.5 is "correct".

JC

True but it is tough to know your starting point.

If the Michelin rep says set your Power One's at 30/21 cold and your gauge is off by 10%, you could end up on your head before you get a chance to find the "correct" numbers on your gauge.