The numbers on a tire sidewall indicate the size and type of the tire. The first number in the sequence represents the tire’s width in millimeters or inches.
The second number is the aspect ratio, which is the height of the tire’s sidewall measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.
For example, if a motorcycle tire has a size of 120/80V-16, the “120” is the nominal width of the tire in millimeters, and the “80” is the aspect ratio expressed as a percentage of the width.
The aspect ratio is an important factor in determining the tire’s performance. The higher the aspect ratio, the taller the tire’s sidewall, which provides a smoother ride and better handling. The aspect ratio also affects the tire’s load-carrying capacity and fuel efficiency.
The last letter in the tire size sequence represents the speed rating, which indicates the maximum speed at which the tire can safely operate. The speed rating is important for high-performance vehicles that require tires capable of handling high speeds.
In summary, the numbers on a tire sidewall indicate the tire’s size, type, width, aspect ratio, and speed rating.
The aspect ratio is the height of the tire’s sidewall expressed as a percentage of tire width, and the speed rating indicates the maximum speed at which the tire can safely operate.
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