How to Check Tire Pressure

Small image of an individual with a pressure gauge.

Tires have been known to lose up to 1psi (pounds per square inch) every month, so check all tires, including your spare, once a month (or before a long trip). It’s easy. Here’s how:

 

  1. Purchase a trusted pressure gauge.
  2. Check your tires “cold” – before you’ve driven or at least three hours after you’ve driven.
  3. Insert pressure gauge into the valve stem on your tire. (The gauge will “pop” out and show a measured number. When you hear a “pssst” sound, that’s air escaping the tire. The escaping air shouldn’t affect pressure substantially, unless you hold down the air pressure gauge too long.)
  4. Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall. 
  5. If your psi is above the number, let air out until it matches. If below, add air (or have a Michelin retailer help you) until it reaches the proper number. 

 

Low pressure can lead to tire damage. See the inflation difference:

 

Car & Pickup Tires
3/4 & 1 Ton Trucks

Nitrogen Versus Compressed Air 

Most tires are filled with compressed air. But some tire retailers have started to put nitrogen into their customers’ tires. (Nitrogen is simply dry air with the oxygen removed. Air contains nearly 79% nitrogen already.) Because nitrogen replaces oxygen, less air can escape your tires, and your inflation pressure stays higher longer. Unfortunately, there are other possible sources of leaks (tire/rim interface, valve, valve/rim interface and the wheel) which prevent the guarantee of pressure maintenance for individuals using air or nitrogen inflation.

 

Nitrogen and compressed air CAN be mixed, if needed. Tires manufactured by Michelin are designed to deliver their expected performance when inflated with air or nitrogen, as long as the user respects the pressures recommended by the vehicle manufacturer on the vehicle’s placard or by the tire manufacturer.

Although not available online, we may be able to help you find a tire that fits your selection.

Please tell us the year, make and model of the vehicle for which you would like a tire recommendation. Also please let us know which tire features are important to you. Finally, let us know the area of the country where you do most of your driving. This way, we can provide you with our best recommendation.

Please click the "CONTACT US" button below to allow our Consumer Care team to help you find a tire that matches your selectionorview all tire sizes available.

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Please Note

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  • In order to find your vehicle's options please check the following:
- The vehicle's window sticker, or a decal usually located on the side or rear of the vehicle
- The vehicle owner manual
- Your original sales invoice
  • Your vehicle was manufactured with multiple tire sizes. Please select your size.

    Knowing your tire size can help save time at the tire retailer. It also enables you to make an informed tire purchase.

You can find your vehicle's original equipment tire size in one of the following places:
1. On the tire placard located on the driver's door jamb 
2. In your owners manual
3. On glove compartment door
 4. Inside the fuel hatch or trunk lid

You can also check your existing tire's designation on the sidewall. However, there is no guarantee that these are the original tire size unless they came on the vehicle new.

 Note: Tire Size Image. Show sidewall and tire placard. Example below from UK.
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  • Find the exact tire quickly using your tire size. Check your owner's manual or tire sidewall to find the required specifications.

  • This three-digit number represents the width of the tire in millimeters (mm), measured from sidewall to sidewall. Since this measure is affected by the width of the rim, the measurement is done when the tire is on its intended rim size.  <div><img src="/assets/mi/system/images/contextual-help/R2-width.png" /></div>
  • The aspect ratio is the relationship of a tire's sidewall height to its section width, expressed as a percentage. In this example, the tire sidewall height is approximately 55% of the tire width. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.<div><img src="/assets/mi/system/images/contextual-help/R2-aspect.png" /></div>
  • The diameter of the rim in inches.<div><img src="/assets/mi/system/images/contextual-help/R2-diameter.png" /></div>
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  • If you know the name of the tire are looking for, select the tire from the list below.

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  • All tires fall into certain categories. If you're wanting to do a broad search of our tire lines, use the list below.

  • All tires fall into certain categories. If you're wanting to do a broad search of our tire lines, use the list below.
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