The second number, 90, is the aspect ratio of the tire, which represents the height of the tire as a percentage of its width.
In this case, the tire height is 90% of the width, or 117 millimeters high. The third number, 17, is the diameter of the wheel in inches.
The markings on a motorcycle tire are important in determining which tires are right for a particular motorcycle. It is crucial to have the right size and style of tire for a motorcycle to ensure safety.
The load and speed index is also indicated on the tire. The load index represents the maximum weight that the tire can carry, while the speed index represents the maximum speed that the tire can handle.
For example, a tire with a load index of 67 and a speed index of H can carry a maximum load of 677 pounds and can handle a maximum speed of 130 mph.
In addition to the numbers, there may be letters on the tire that indicate its construction and purpose.
The letter “M” indicates that the tire is for motorcycle use, while the letter “T” represents the tire width code. The letter “S” represents the speed rating, and the letter “Z” indicates that the tire has no maximum speed rating.
The letter “R” indicates that the tire is of radial construction, while the letter “B” indicates that the tire is belted.
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