What Does 80 90 17 Mean on a Tire?

The numbers on a tire, such as 80/90-17, indicate the tire’s width, height, and rim diameter. The first number represents the width of the tire in millimeters.

The second number represents the height of the tire’s sidewall, measured as a percentage of the tire’s width. The third number represents the diameter of the rim in inches.

For example, a motorcycle tire with the code 80/90-17 has a width of 80 millimeters, a sidewall height of 90% of the width (72 millimeters), and a rim diameter of 17 inches.

Another example is the alphanumeric designation MT90 17, which represents the same tire size as 130/90 17. The “M” in MT90 17 indicates that the tire is for motorcycle use, while the “T” represents the tire width code.

The “90” in MT90 17 represents the aspect ratio between the tire’s width and height, and the “17” represents the rim diameter.

It is important to note that different tire manufacturers may use slightly different codes to indicate tire size. It is also important to choose the right tire size for your motorcycle to ensure safety and optimal performance.

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