( Appx1) It works well for most low-pressure gases. It is a good approximation of the behavior of many gases under many conditions. The equation we use to calculate the relationship between tire pressure and the temperature is called the Ideal Gas Law. For those who want a deeper dive into how psi's are determined, here's the science behind it. When it comes to commercial truck tires, which are often inflated to over 80 psi (twice as much as a passenger vehicle tires), the change of tire pressure according to temperature is doubled to 2 psi for every 10☏.įor 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.

How Does Temperature Affect Tire Pressure?įirst of all, the rule of thumb is for each 10☏ (5.6 ☌) decrease in temperature, the tire pressure will drop by one psi for most passenger vehicles. Also, temperature affects the tire pressure a lot, and we will explain it in the next section.Ĥ. Thus, we highly recommend that you check your tire pressure regularly, especially before a long drive or heavy load driving.

Cannot turn on if the TPMS is not transmitting the signal to the dashboardįor more information about the tire pressure monitoring system, please check our post about TPMS: What is TPMS and Why Does it Matter?.

Cannot tell which tire is under-inflated.

Turn on after the tire pressure is well underinflated.

Tire maintenance is essential for the overall performance of your vehicle, and we highly recommend that you check your tire pressure every time you inflate your tire, each 10☏ (5.6 ☌) temperature change, and every 30 days.īe mindful that don’t wait until the TPMS(Tire Pressure Monitoring System) light come on before you check the tire pressure, as the normal TPMS may: Let the air out a bit if they are over-inflated by pressing the gauge harder on the valve stem.ģ. Step 5: Check the tire pressure againĪfter filling the tires, use your tire pressure gauge to check the tire pressure again and make sure they are in a good range. It’s ok to overinflate a bit when filling the tires, as you can let the air out with the gauge. If you have to fill your tires when the tires are hot, inflate them 3~4 psi above the recommended psi, and check again with your gauge when they are cold. Remember to rest your tires for at least half an hour to make sure they’re cold and the reading is accurate. You can either buy an air compressor in the auto parts store or use one in a gas station. If you find a tire underinflated, use the air compressor to fill your tires. Step 4: Fill your tires to the recommended psi

Make sure you read in detail, as for some vehicles, front and rear tires have different recommended psi. You can then note down the tire pressure of each tire, and compare them with the ideal psi you read from inside your driver’s door or in the owner’s manual. There should be a reading as long as the gauge is well connected to the tire. Unscrew the valve cap and press the tire gauge onto the valve stem hard enough until the hissing sound disappears. Step 2: Check the tire pressure with the gauge We mostly check the tire pressure after one night's rest to avoid the heat from the friction of the last drive, and before the temperature goes up. A Tire Pressure Gauge(Digital or Regular)Īs tire pressure changes with the temperature a lot, and recommended tire pressures are cold inflation pressure, you should start with cold tires if possible.To check tire pressure at home, you need: You can check your tire pressure in auto part stores, the mechanics, gas stations, and at home. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning.Īfter knowing the proper tire pressure of your vehicle recommended by the manufacturer, you should check your tire pressure regularly to make sure that you are in good shape. Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. If there’s no sticker, you can usually find the info in the owner’s manual. For most vehicles, you can find the ideal tire pressure on the sticker/card inside the driver’s door for newer cars. The recommended tire pressure varies based on the vehicle makes determined by the manufacturer after thousands of tests and calculations. What's The Recommended Tire Pressure For My Car?

We got tons of questions like this from our community, so for today, let's dive deep into the world of tire pressure, put our geeky glasses on and figure out everything you need to know about your tires.ġ. Why does tire pressure matter? What the heck is that little annoying symbol on my dashboard? Should I under-inflate my tire during the winter? How often should I check my tire pressure? When it comes to driving safety, tire pressure is always one of the hottest topics.

Flat tire psi