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Old 11-04-11, 01:29 AM
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gasnavi
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are you sure?

Atmospheric air pressure at sea level is about 14.7psi. if you went up to an altitude of 10000ft, the pressure would be about 10psi. So wouldn't the pressure if the tires be multiplied by (14.7/10)? That comes out to 1.47. If your tire was at 100psi at sea level, it would be at 147psi at and elevation of 10000ft. This seems to more accurately explain why road tires pop in airplanes if they are inflated to normal riding pressures. Both of my 26" Primo Comet's popped when I was going through a mountain pass. They were pumped up to 100psi. This would mean that it would have been 1.3 times the pressure at sea level.

My reasoning may be off, but here it is.
If the atmospheric pressure pushing against the outside of the tire decreases to half of what it was originally, wouldn't the tire pressure pushing out effectively double?


I got my pressures from here:
http://www.engineeringtoolbox.com/ai...ure-d_462.html


I know this is an old thread, but i'm driving down again and just wanted to clarify.
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