Atmospheric pressure, which is the weight of a column of air from Earth's surface to the edge of the atmosphere (approximately 14.7 pounds per square inch), pushes against tires from the outside, meaning tire pressure gauges measure the difference between internal tire pressure and external atmospheric pressure rather than absolute pressure.
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Your Tires Are Being CRUSHED By The AtmospherAdded:
So, tire pressure first of all, if you have a tire with quote no air in it, of course there's air in it.
Because there's the atmospheric air is in it. [music] Right. Okay, and atmosphere has its own pressure.
And this is the weight of a column of air from Earth's surface all the way up to the edge of the atmosphere. If you had a found found a way to weigh this we I think we might have talked about this in another explainer. But if you if you have like 1 square inch or 1 square anything, but 1 square inch and have weigh that column of air will weigh 14.7 lb.
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