|Front Tire Size Conversions||Rear Tire Size Conversions|
NOTE: ALWAYS use the exact tire size, type, speed and load rating recommended by the manufacturer of your motorcycle. Never try to second-guess the designers and engineers with regards to tire size, type, speed or load rating! Use the information on this page for general reference only and not for choosing motorcycle tires.
|Tire Speed Rating Chart (New Style Speed and Load Index)|
|Speed Rating||Max. Design Speed (MPH)|
|Note: Reference: Maxxis Tire School (see link for load ratings)|
|Note that modern tires are rated with a speed rating and load index. From Michelin: "This code, when present, appears after the size marking. The code comprises three characters: two numbers and a letter, for example, 67H. The two-digit number is a code for the maximum load carrying capacity of the tire. The letter is a maximum speed rating indicating the maximum speed at which the tire may be used with maximum load when the maximum listed inflation pressure is used."|
|Tire Speed Rating Chart (Old Style)|
|Motorcycle Tire Speed Ratings||Max. Design Speed (MPH)|
|Note: Tires with 2.00, 2.25 & 2.50 nominal section widths are rated for 75 mph.|
|Note that modern tires are now rated with a speed rating and load index. From Michelin: "This code, when present, appears after the size marking. The code comprises three characters: two numbers and a letter, for example, 67H. The two-digit number is a code for the maximum load carrying capacity of the tire. The letter is a maximum speed rating indicating the maximum speed at which the tire may be used with maximum load when the maximum listed inflation pressure is used."|
The load rating corresponds to the total load carrying capacity of the tire at the speed indicated by the speed symbol. The Aspect Ratio equals the height divided by the width times 100.
|Street Tire Size Designations|
NOTE: The information on this page was taken from various motorcycle tire manufacturer websites. It is for general reference only and was originally published in 2001. It is not definitive and it may be outdated. Consider the information here as an estimate only and not proven definitive. It may not be correct; check with your tire manufacturer for the exact tire specifications.
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