In cool weather, a tire will typically lose one or two pounds of air per month. In warm weather, tires lose even more air. Keep in mind that many vehicles have different tire pressures on the front and rear axle. Correct air pressure should also be listed on the tire placard attached to the vehicle door edge, doorpost, glove box door or fuel door.
This means that one or more of your tires is significantly under-inflated. This means that the right front tire is significantly under-inflated. Before you know it, your tires are underinflated. Be sure to check your tire pressure regularly during the winter months. Just as cold outside air causes the air inside your tires to contract in winter, warm outside air causes the air inside your tires to expand in summer.
The rule of thumb best understood as our American counterparts put it is that tire pressure will go up approximately one pound per square inch PSI for every 10 Fahrenheit increase in temperature. It's also important in summer to keep in mind that driving equals friction between the road and your tires, which equals heat, which equals…you guessed it…an increase in tire pressure. For this reason, regardless of the weather, your air pressure can increase about 5 PSI in the first half-hour of driving before stabilizing.
In the sweltering heat of summer asphalt at high speeds for long stretches, that number can rise, and not for the better. This site uses cookies. Click here to find out more. Ok Thanks. Our stores are open. Contact Us Sign in Location: Hamburg. Book a Tire Change. If you find a tire underinflated, use the air compressor to fill your tires. You can either buy an air compressor in the auto parts store or use one in a gas station.
After filling the tires, use your tire pressure gauge to check the tire pressure again and make sure they are in a good range. Let the air out a bit if they are over-inflated by pressing the gauge harder on the valve stem. Thus, we highly recommend that you check your tire pressure regularly, especially before a long drive or heavy load driving.
Also, temperature affects the tire pressure a lot, and we will explain it in the next section. For the non-nerdy readers, just remember this rule of thumb and keep in mind that you will need to monitor your tire pressure during different seasons or a sudden temperature change.
For those who want a deeper dive into how psi's are determined, here's the science behind it. The equation we use to calculate the relationship between tire pressure and the temperature is called the Ideal Gas Law. It is a good approximation of the behavior of many gases under many conditions. Appx1 It works well for most low-pressure gases. First, we take the Ideal Gas Law equation and apply it to our circumstance:. Given the n and R are both constants, and the gas volume in the tire is also a constant, we can take those constants out of the equation, and suddenly we get this straightforward one:.
Put all that into the equation,. Both overinflation and underinflation affect your tire performance a lot, and serious problems might occur.
So how will a bad tire pressure affect driving safety? We will explain in detail below. The grip is mostly associated with the size of the contact patch between the tire and the road. An over-inflated tire radically decreases the contact patch while an under-inflated tire does the opposite. A larger contact patch gives you more grip, and this is the exact reason why lots of racers will intentionally decrease their tire pressures to create a larger contact patch on a dry race track.
Press ESC to cancel. Ben Davis March 28, What is the normal tire pressure for PSI? What is acceptable tire pressure? What is an unsafe tire pressure? Is 37 tire pressure too high? Is 55 psi too much for tires?
How do you know if you have too much air in your tires?
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