What Does a 90/90-18 Rear Tire Size Mean for Motorcycles?

Learn what the 90/90-18 motorcycle rear tire size means, including width, aspect ratio, and rim diameter for optimal bike performance.

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The tire size 90 90 18 refers to the width, aspect ratio, and rim diameter of the tire. The first '90' stands for the tire's width in millimeters. The second '90' indicates the aspect ratio, meaning the height of the tire's sidewall is 90% of its width. The '18' denotes the diameter of the wheel rim in inches. This measurement is commonly used for motorcycles, providing crucial information for matching tires to specific bikes for optimal performance and safety.

FAQs & Answers

  1. What does each number in a motorcycle tire size represent? The first number indicates the tire's width in millimeters, the second is the aspect ratio (sidewall height as a percentage of the width), and the last number is the rim diameter in inches.
  2. Why is knowing the tire size important for motorcycles? Correct tire size ensures proper fit on the rim, optimal handling, safety, and performance of the motorcycle.
  3. Can I replace a 90/90-18 tire with a different size? It's best to use the manufacturer-recommended tire size to maintain handling and safety, but some variations are possible if carefully matched to your bike's specifications.

Watch More

For a deeper understanding of motorcycle tire specifications and maintenance tips, check out our related videos on tire pressure, tread patterns, and how to choose the right tires for your bike to ensure safety and performance.

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