Wheel Bearing Kit

Dirt Bike tire measurements:

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

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)