Do you know that tire pressures change due to time and temperature?
Researches show that tires lose about 1 psi per month due to air escaping through the rubber as it stretches. If you were to check your tires only every three months, it would not be uncommon to find them under inflated by as much as 3-4 psi. Tire inflation pressure also fluctuate with changes in air temperature. Tire pressure decrease with cold and it occurs at a rate of about 1 psi for every 10°F. According to this, if you set the tire correctly at an 80°F ambient temperature will be under inflated by 6 psi at 20°F.

If you add the variations of time and temperature together, it is easy to understand why a tire's inflation pressure should be checked frequently. Improper inflation can cause tires to wear irregularly and can void manufacturer's warranty.

Checking tire pressure frequently allows to determine slow leaks and have them repaired before it permanently damages a tire. Tire pressures should be checked once a week, preferably before the vehicle has been driven. With Tire Pressure Led checking the tire pressure is fast and easy. Spending about a minute a week will help you get the optimum performance your tires and safety of your car.