Motorcycle tyres are manufactured in a number of different countries with differing requirements in terms of load, dimensions and speed ratings. This has resulted in various size markings. This chart gives a guide to the relationship between various size markings.
NOTE: THIS CHART DOES NOT IMPLY EXACT COMPARISONS
In terms of how the various sizes may be displayed on the tyre sidewall markings the illustration gives an example of the Metric, Imperial and Alphabetical designations.
