how to measure

Width is measured in a straight line from the furthest point on one sidewall, across the tread, to the furthest point on the opposite sidewall.

The aspect ratio is the height of the tire sidewall. A smaller number means a lower profile, and the height-to-width ratio is shown as a percent.

Rim diameter is the diameter of the rim/wheel on which the tire will be mounted, in inches.

tire width
tire aspect ratio
rim diameter
2017 Triumph
Thruxton 1200
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  • Front M1A 90/90-21 Tire
    Ride Specific
    Part #: 540032 Mfg Part #: 102251

  • Front VX-40 80/100-21 Tire
    Ride Specific
    Part #: 644547 Mfg Part #: T10570

  • Front VX-30 90/90-21 Tire
    Ride Specific
    Part #: 644433 Mfg Part #: T10554

Viewing Results 1 - 3 of 3