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
2007 KTM
250 XC-F
  • Drive Type: Chain
  • Front Tire Size: 80/100-21
  • Rear Tire Size: 100/100-18
  • Spark Plug: CR9EKB
  • Chain Size: 520
  • Chain Links: 118
  • Front Sprocket/Pulley Teeth: 13
  • Rear Sprocket/Pulley Teeth: 48
  • Battery: GK-ATHBL-0003
For reference only, please consult your owner’s manual to confirm your sizes
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  • exact fit
    Front Bite MX 80/100-21 Tire
    Part #: 644401 Mfg Part #: 2111-376

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