The model number of a car tire represents a variety of parameters for the tire, including width, aspect ratio, hub size, load index, and speed class. Here's a specific explanation of each parameter:
Width: The width of the tire's tread, expressed in millimeters (mm). For example, 205 represents a tire width of 205 mm. The size of the width has an impact on the performance of the tire, and wider tires usually have better grip and stability.
Aspect ratio: The ratio of tire height to width, usually expressed as a percentage. For example, 55 means that the tire height is 55% of the width. Tires with a lower flat profile generally have better handling and responsiveness, while a higher flat ratio provides better comfort and shock absorption.
R: The letter R stands for radial tire, which is a common type of tire. The structure of radial tires is characterized by the cords inside the carcass arranged in a radial direction, which can provide good stability and handling performance.
Hub size: Indicates the diameter of the hub for which the tire is applicable, generally expressed in inches (inch). For example, 16 represents a hub diameter of 16 inches. Wheel size has an impact on the appearance and handling of a vehicle.
Load index: indicates the maximum weight capacity of the tire, it is a code that corresponds to the specific load weight. For example, 89 represents a tire with a maximum weight of 580 kg. The load index of the vehicle needs to match the load index of the tires to ensure safe driving.
Speed Rating: Indicates the maximum speed that the tire can withstand, and is also a code name. For example, the letter V stands for tires for a top speed of 240 km/h. The speed rating also needs to match the top speed of the vehicle to ensure safe driving.
When choosing car tires, you need to consider the above parameters as well as your own driving needs and vehicle type and other factors. At the same time, it is also necessary to pay attention to choosing formal channels to purchase tire products with guaranteed quality.
Take 225 60 r17 99h as an example:
225 means that the width of the tire tread is 225 mm.
60 is the percentage of the tire section height divided by the tire width, i.e. the tire to-flat ratio is 60%.
r indicates that the tire is a radial tire.
17 means that the rim diameter is 17 inches.
99 indicates the load index (the load capacity corresponding to this index is 775kg).
h indicates that the maximum speed is 210 km/h.