Tire Search

    Enter the section width, rim diameter and whether this is a front or rear tire (*all fields are required). If you are unsure what to enter please check out the FAQ’s.

    * Section Width: (e.g. 3.5 if inches, 120 if mm, MH if alphabetical)
    * Rim Diameter: (likely between 10 and 24 inches)
    * Front/Rear:


    How do I read the information on a tire sidewall?

    One of the more common sidewall markings is metric. You might see sidewalls that look like the below. 120/90ZR-17 or 120/90-17 67 ZR

    LabelDescription
    120120 mm. Section width, 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 for the tire when it is on its intended rim size.
    9090%. Aspect ratio, tells you the height of the tire, from the bead to the top of the tread. This is described as a percentage of the tire width. In our example, the aspect ratio is 90, so the tire’s height is 90 percent of its width. The smaller the aspect ratio, the wider the tire in relation to its height.
    ZRZR. Speed Rating, tire can be ridden over 149 mph (240 km/h) for sustained periods of time. Most other speed ratings indicate a maximum sustained speed.
    1717 inches. Rim diameter, this number specifies, in inches, the wheel rim diameter the tire is designed for. This is the diameter of the wheel in inches where the beads of the tire sit on the wheel. This measurement does not include the rim flange, so don’t measure from the outside of the rim.
    6767 load index. The load index indicates how much load the tire can carry.

      Another sidewall marking pattern is alphabetical. M T 90 – 17 Load Range B

    LabelDescription
    MM = Motorcycle code.
    TT = Tire Width code.
    9090%. Aspect ratio, tells you the height of the tire, from the bead to the top of the tread. This is described as a percentage of the tire width. In our example, the aspect ratio is 90, so the tire’s height is 90 percent of its width. The smaller the aspect ratio, the wider the tire in relation to its height.
    1717 inches. Rim diameter, this number specifies, in inches, the wheel rim diameter the tire is designed for. This is the diameter of the wheel in inches where the beads of the tire sit on the wheel. This measurement does not include the rim flange, so don’t measure from the outside of the rim.
    Load Range BThe load range indicates how much load the tire can carry.

      Another sidewall marking pattern is in inches. 4.50 ZR 17 4PR

    LabelDescription
    4.504.50 inches. Section width, the width of the tire in inches, measured from sidewall to sidewall. Since this measure is affected by the width of the rim, the measurement is for the tire when it is on its intended rim size.
    ZRZR. Speed Rating, tire can be ridden over 149 mph (240 km/h) for sustained periods of time. Most other speed ratings indicate a maximum sustained speed.
    1717 inches. Rim diameter, this number specifies, in inches, the wheel rim diameter the tire is designed for. This is the diameter of the wheel in inches where the beads of the tire sit on the wheel. This measurement does not include the rim flange, so don’t measure from the outside of the rim.
    4PR4PR – Casing Strength (Ply Rating). The casing strength or ply rating refers to the tire load index. The PR marking is now only applied by the Japanese standard (JATMA). The Japanese standard can be compared to the European standard as follows: 4PR = normal version, 6PR = reinforced version. The PR number does not refer to the number of plies in the tire.
    What is a tire speed rating?
    The tire speed rating indicates the maximum speed at which a motorcycle can be driven for sustained periods of time. Your motorcycle should have specific speed rated tires that are recommended and you should try and buy the motorcycle manufacturer recommended speed rated tires.

    Speed RatingSpeed Category
    JUp to 62 mph (100 km/h)
    NUp to 87 mph (140 km/h)
    PUp to 93 mph (150 km/h)
    SUp to 112 mph (180 km/h)
    HUp to 130 mph (210 km/h)
    V (with service description)Up to 149 mph (240 km/h)
    WUp to 168 mph (270 km/h)
    Z (with service description)Over 149 mph (240 km/h)
    What is the load rating?

    The load index indicates how much load the tire can carry at a given speed. If you exceed the load index you risk tire failure. To calculate your total load capacity you need to add the load from the front and rear tires together.

    Load IndexPoundsLoad IndexPoundsLoad IndexPoundsLoad IndexPounds
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    2544940865639811019342605041966661821047352675143067677831074362765244168694841102372825345469716851135382915446770739861168393005548171761871201403095649472783881235413205750773805891279423315852074827901323433425953675853911356443536055176882921389453646156777908931433463756258478937941477473866360079963951521483976461780992961565 A related measure is called the load range. The load range can be compared to the specific tire manufacturer chart to determine the correct tire to purchase.