Underinflated tires cause vehicle imbalance, promote irregular wear and can cause load-carrying capacity issues. When the temperature drops, the air inside your tires naturally contracts at a rate of about 1 psi per 10 degrees Fahrenheit. Moreover, it is natural for air pressure to permeate through the tire's rubber sidewall at an additional rate of approximately 1 psi per month regardless of temperature.
This means that if you had set your tire pressure at 36 psi on a 70 degree summer day (six months ago) and the pressure has since dropped to 30 degrees, your tires at this moment could have as little as 26 psi in them.
Checking your tire pressure on a monthly basis takes only a few moments and keeps you and your family protected during these cold winter months.
A wide array of tire pressure gauges are available at several price points including the cost-effective Accutire Digital Pencil Air Gauge and the extremely accurate Accutire Racing Air Gauge that measures to 1/10th a pound of psi pressure.