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
2008 KTM
530 XCR-W
  • Drive Type: Chain
  • Front Tire Size: 80/90-21
  • Rear Tire Size: 110/100-18
  • Chain Size: 520
  • Chain Links: 118
For reference only, please consult your owner’s manual to confirm your sizes
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  • exact fit
    Rear Surge P 110/100-18 Tire
    5.0 star rating (1)
    Sale $63.79 - $74.59
    $82.88 - 10% Off
    Part #: 643410 Mfg Part #: TM73511500

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