Each tire sidewall is engraved with the speed symbol (also known as the speed level) of the tire, and the corresponding speed symbol indicates the maximum speed of the tire.

Let me give another example to illustrate the meanings of numbers and letters in tire models:

225/60 R17 99H

225 represents the cross-sectional width, which can be simply understood as the width of the tire tread.

The flatness ratio represented by 60 can be simply understood as the height of the tire wall.

R represents the tire type code, and R is the radial tire.

17 represents the diameter of the wheel hub, which means the tire is suitable for tires with 17 inch wheels.

99 represents the load capacity index of the tire, which is the maximum weight that the tire can bear. 99 can withstand a weight of 775KG

H represents the speed rating of the tire, which is the maximum speed that the tire can withstand. H can withstand a speed of 210KM/H