• Recommended Tire Pressure

    Finding Your Vehicle’s Recommended Tire Pressure and Load Limits

    Tire information placards and vehicle certification labels contain information on tires and load limits. These labels indicate the vehicle manufacturer’s information including:

    • Recommended tire size
    • Recommended tire inflation pressure
    • Vehicle capacity weight (VCW–the maximum occupant and cargo weight a vehicle is designed to carry)
    • Front and rear gross axle weight ratings (GAWR– the maximum weight the axle systems are designed to carry).

    Both placards and certification labels are permanently attached to the vehicle door edge, door post, glove-box door, or inside of the trunk lid. You can also find the recommended tire pressure and load limit for your vehicle in the vehicle owner’s

  • Understanding Tire Pressure and Load Limits

    Understanding Tire Pressure and Load Limits

    Tire inflation pressure is the level of air in the tire that provides it with load-carrying capacity and affects the overall performance of the vehicle. The tire inflation pressure is a number that indicates the amount of air pressure– measured in
    pounds per square inch (psi)–a tire requires to be properly inflated. (You will also find this number on the vehicle information placard expressed in kilopascals (kPa), which is the metric measure used internationally.)

    Manufacturers of passenger vehicles and light trucks determine this number based on the vehicle’s design load limit, that is, the greatest amount of weight a vehicle can safely carry and the vehicle’s tire size.The proper tire pressure for your
    vehicle is referred to as the “recommended cold inflation pressure.” (As you will read below, it is difficult to obtain the recommended tire pressure if your tires are not cold.)

    Because tires are designed to be used on more than one type of vehicle, tire manufacturers list the “maximum permissible inflation pressure” on the tire sidewall. This number is the greatest amount of air pressure that should ever be put in the
    tire under normal driving conditions.

  • Checking Tire Pressure

    It is important to check your vehicle’s tire pressure at least once a month for the following reasons:

    • Most tires may naturally lose air over time.
    • Tires can lose air suddenly if you drive over a pothole or other object or if you strike the curb when parking.
    • With radial tires, it is usually not possible to determine underinflation by visual inspection.

    For convenience, purchase a tire pressure gauge to keep in your vehicle. Gauges can be purchased at tire dealerships, auto supply stores, and other retail outlets.

    The recommended tire inflation pressure that vehicle manufacturers provide reflects the proper psi when a tire is cold. The term cold does not relate to the outside temperature. Rather, a cold tire is one that has not been driven on for at least
    three hours. When you drive, your tires get warmer, causing the air pressure within them to increase. Therefore, to get an accurate tire pressure reading, you must measure tire pressure when the tires are cold or compensate for the extra pressure in
    warm tires.

  • Steps for Maintaining Proper Tire Pressure

    Steps for Maintaining Proper Tire Pressure:

    Step 1:

    Locate the recommended tire pressure on the vehicle’s tire information placard, certification label, or in the owner’s manual.

    Step 2:

    Record the tire pressure of all tires.

    Step 3:

    If the tire pressure is too high in any of the tires, slowly release air by gently pressing on the tire valve stem with the edge of your tire gauge until you get to the correct pressure.

    Step 4:

    If the tire pressure is too low, note the difference between the measured tire pressure and the correct tire pressure. These “missing” pounds of pressure are what you will need to add.

    Step 5:

    At a service station, add the missing pounds of air pressure to each tire that is underinflated.

    Step 6:

    Check all the tires to make sure they have the same air pressure (except in cases in which the front and rear tires are supposed to have different amounts of pressure).

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