What Do the Numbers 110 90 18 Mean on Tyres? Explained

Learn what the tyre size numbers 110 90 18 represent and how they affect your vehicle's tyre compatibility and performance.

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The numbers 110 90 18 on tyres represent their size specifications. The first number (110) indicates the tyre's width in millimeters. The second number (90) is the aspect ratio, showing the height of the tyre sidewall as a percentage of its width. A higher number means a taller sidewall. The last number (18) denotes the diameter of the wheel rim in inches that the tyre is designed to fit. This sizing is crucial for ensuring compatibility and optimal performance of your vehicle.

FAQs & Answers

  1. What does the number 110 on a tyre mean? The number 110 represents the tyre's width in millimeters across its tread.
  2. What is the significance of the aspect ratio number on a tyre? The aspect ratio, such as 90, indicates the tyre's sidewall height as a percentage of its width.
  3. Why is the tyre diameter important? The diameter number, for example 18, shows the wheel rim size in inches that the tyre fits, ensuring proper compatibility.

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