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Tyre Sizes Explained

Want to understand tyre dimensions? Below you'll find a quick guide which explains as to what the different numbers and letters on your tyre's sidewall mean.

  • Width - width of the tyre in millimetres.
  • Aspect ratio - the relationship of a tire's sidewall height to its section width, expressed as a percentage. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.
  • Rim size - the diameter of the tyre's inner rim in inches.
  • Load index – a number relating to the load-carrying capacity of a tyre. The higher the tire's load index number, the greater its load carrying capacity.
  • Speed Rating - indicates the maximum speed for the tyre when at full load.
Tyre Sizes Explained

Michelin provides a range of high quality tyres in most sizes. To find the best tyres available in the right size simply click on one of the links below or browse our complete MICHELIN tyre catalogue.