Why You Should Check Your Tire Pressure Every Month This Winter
To obtain a driver’s license when I turned 16, I had to not only pass a state driving test, but also demonstrate my proficiency in performing basic vehicle maintenance tasks as defined by my parents. This included checking my tire pressure, which I was told to do at least once a month during the winter months. Here’s the rationale behind this recommendation and the best time of day to check your tire pressure.
What can happen to tire pressure in winter?
When tires lose less air in cold weather, it is not a sign that they are leaking. Air compresses as it cools, so as temperatures drop, the air inside your tires becomes denser, taking up less space and ultimately losing air pressure.
Generally speaking, for every 10° F drop in temperature , your tires will lose one or two pounds per square inch (psi) of pressure. This is often enough to cause the Tire Pressure Monitoring System (TPSM) light to come on, even though the loss of pressure may not be noticeable, and if your tires were fully inflated to begin with, you probably won’t notice it while driving.
When should you check your tire pressure in winter?
Most tire experts recommend checking your tire pressure once a month during the winter, although some suggest doing it every two weeks or after any sudden and significant drop in temperature. It’s best to check your tire pressure in the morning before driving anywhere. If this is not possible, be sure to let the car sit for at least three hours after driving to get an accurate reading.
It’s not enough to check the pressure in one tire: pressure can be lost at different levels, so it’s important to check all four tires, as well as the spare if you have one. And, as always, if in doubt, consult your owner’s manual for more information on caring for your tires in cold weather.