The speed rating of the tire is indicated by English letters on the sidewall of different tires, indicating the maximum speed at which the tire can carry the specified load under specified conditions.
Cavity: The mold cavity that constitutes the contour of the tyre mold product
Centripetal mechanism: a group of parts that form the mold shell and drive the opening and closing of the pattern blocks
The higher the speed rating of the tire, the greater the extreme speed it can withstand. During the process of driving the car, the grip of the tire will be stronger.