Quote:
Originally Posted by radroach
Make sure you check your tire pressure when you go above 500ft elevation, your tires deflate at altitude and then they repressurize at sea level, so then you have to let some air out when you return from the mountains.
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That's actually backwards. The reduced ambient air pressure at altitude means the tires want to expand. Going the other way, the increased ambient pressure at sea level wants to crush the tire, so you need to add more pressure. What you measure inside the tire (or any bladder for that matter) is pressure differential.