Dirt Bike Tire Finder

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Dirt Bike Tire Search

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Dirt Bike tire conversion chart:


Dirt Bike tire measurements:

Dirt Bike tires are commonly measured in millimeters by Width / Aspect Ratio x Rim Diameter (inches).

Dirt Bike tire measurements

    Term definitions:

  • Aspect Ratio: The aspect ratio is the height of the sidewall in relation to the width of the tread. For example, on the tire size above, the aspect ratio is 90% of the tread width (the first number in the tire size), creating a 99 millimeter sidewall height.
  • Radial: Radial constructed tires utilize both ply and breaker (or belt) cords. The Ply cords extend from bead to bead at approximately 90 degree angle to the centerline of the tire. The breaker (or belt) cords are placed on top of the ply cords across the width of the tire. Advantages: Adding breaker (or belt) cords results in a stiffer carcass which helps provide a longer tread and tire life, better steering control and handling, overall smoother ride and ride comfort, and higher tread puncture resistance.
  • Bias: Bias tires typically have the ply cords that extend diagonally from bead to bead at a range of 30 to 60 degree angles from the centerline. Each successive ply is laid at an opposing angle, forming a criss-cross pattern. Advantages: The design allows the entire tire body to flex easily, giving a comfortable ride on rough surfaces.