What happens to air pressure in tires as temperature increases?

As temperature increases, the air pressure within tires also increases. This is due to the principles of thermodynamics, specifically the ideal gas law, which indicates that when the temperature of a gas rises, its pressure will also rise if the volume remains constant. In the context of tires, as the temperature of the air inside the tire elevates – typically due to driving or external temperature changes – the air molecules gain energy, move more vigorously, and collide with the walls of the tire more forcefully. This results in increased pressure.

It is important for drivers to monitor tire pressure, especially during warmer weather or after long drives, as improper tire pressure can lead to decreased fuel efficiency, increased tire wear, and a higher risk of tire blowouts.