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dbradx t1_ixru0di wrote

When it gets cold enough, the air in the tire condenses, i.e. transforms into water droplets and takes up less space in the tire. After driving for a bit, it heats back up and will often return to full pressure until it gets cold again.

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xYoSoYx OP t1_ixrufvq wrote

Ahh okay. So they don’t just slow down and give less pressure - they actually condense into water, and give no pressure at all then?

I don’t think I ever would’ve thought of them turning to water.

Follow up - if you’re interested - how does this affect the pressure of the tire if you fill it up in the winter, and then it gets warmer out? Wouldn’t that make the psi too high?

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