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

Bike tire pressure decreases as temperature drops. This is because the air inside the tires is compressed when heated. When the air is compressed, its pressure increases. When the air cools, the pressure decreases.

The amount that tire pressure decreases depends on the temperature change. For example, a 10-degree Celsius drop in temperature can cause a tire pressure drop of 1 psi.

This pressure decrease can make your tires seem deflated, even though they may actually be at the correct pressure. To compensate for this, you may need to add a little more air to your tires on cold days.

Here are some other things that can affect bike tire pressure:

* Altitude: Air pressure decreases as altitude increases. This is because the air is less dense at higher altitudes.

* Tire size: Wider tires have a larger air volume than narrower tires. This means that they will lose more pressure when the temperature drops.

* Tire construction: Some tires are made with a special sealant that helps to maintain air pressure. These tires are less likely to lose pressure when the temperature drops.

By understanding the factors that affect bike tire pressure, you can make sure your tires are always at the correct pressure, regardless of the weather conditions.