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Air shrinks when it's cold. Your car tires lose pressure, but have enough volume that the tires don't go flat.

Bike tires don't have the storage volume, so they go flat.

Or, you could just have a slow leak.

Because the oxygen molecules in the tire arent moving as fast as they would be in the heat. The heat causes friction between atoms.

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Wiki User

10y ago
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Wiki User

14y ago

Depends. Best is if you can store the bike hanging, w/o weight on the tires, and then let the air out. If you have to store it on the tires it's better to have enough air in the tires to keep them from deforming too much.

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Wiki User

14y ago

Nothing much. When it gets warmer the pressure will increase. In extreme cases it can cause tires to blow due to overpressure.

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Wiki User

12y ago

The cold causes the air pressure to reduce. Heat would cause it to increase.

Cold air is more dense, heated air expands.

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Wiki User

9y ago

The cold causes the air in the tyre to contract, so apparently softening the tyre pressure.

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keelan Jonhson

Lvl 2
1y ago

but what happens if you try to pump it up with air

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Dinith Subasinha-21

Lvl 4
2y ago

because its cold

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Q: Why does your bike tires seem deflated on a cold day?
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