Tire knowledge

 As an important component of a car, the performance and parameters of tires have a significant impact on driving safety and comfort. The following is a detailed interpretation of common tire parameters:
Functions and characteristics of tires
Carrying the weight of the vehicle: The primary function of tires is to support the weight of the car, enabling it to travel steadily.
Shock absorption effect: Tires can reduce and alleviate vibrations and noise during vehicle operation, improving ride comfort.
Handling performance: Through different patterns and formulations, tires can affect the acceleration, braking, and steering performance of the car.
The three most commonly encountered parameters when choosing tires
Tire width: The wider the tire width, the larger the contact area, and the better the grip and traction when driving in a straight line, but the fuel consumption will increase accordingly.
Flatness ratio: Flatness ratio is the ratio of tire height to width, expressed as a percentage. Tires with a larger flat ratio provide higher comfort, but have poorer feedback on the road surface; Flat tires with smaller ratios have stronger handling and are commonly used in sports style vehicles.
R represents radial tires: Radial tires have the characteristics of less deformation of the tread, better ground grip and stability, and are suitable for high-speed driving.
J value
Definition: The J value represents the width of the wheel rim, which matches the width of the tire.
Upgrade suggestion: Without replacing the wheels, the tire width upgrade should not exceed 10% of the original factory width and should be matched with suitable J-value wheels.
Speed level/load index
Speed level: The tire has a designed critical speed, exceeding which may cause standing waves and tire blowouts. When driving at high speeds, it is best to control the speed at around 100km/h and regularly reduce the speed to cool down.
Standing wave phenomenon: When driving at high speeds and the tire's recovery speed cannot keep up with the speed, it can cause standing wave phenomenon, resulting in rapid heating and peeling of the tire, leading to tire blowout.
Load index: Refers to the maximum load capacity of a tire at its maximum air pressure.
Special parameters on tires
Three "T" indices:
Treadwear: The larger the number, the more wear-resistant the tire is, but the grip performance may be poor.
Wetland Traction: Expressed as AA/A/B/C, AA represents excellent wetland grip.
Temperature index: It reflects the tire's heat dissipation ability, and the higher the level, the better the stability during high-speed driving.
Tire wear identification: Identify the degree of tire wear and the timing of replacement.
Other important information
Production date/certification mark: Understand the production date and certification status of the tire to ensure its quality and safety.
Tire structure description: Understand the structural characteristics of tires, such as single directional patterns, asymmetric patterns, etc.
Snow tire identification: Identify whether the tire is suitable for snow driving.
Tire direction: Ensure that the tire is installed in the correct direction. Single directional pattern tires and asymmetric pattern tires have specific installation directions.
matters needing attention
Tire rolling direction: Ensure that the tire rolling direction is correct to avoid affecting handling performance and safety.
Internal and external installation reversed: If the tire is found to be installed reversed, it should be corrected in a timely manner to avoid affecting the handling and braking performance.
Reverse installation of rolling direction: Single directional tires should be installed in the direction of the arrow to avoid affecting vehicle performance and safety.
By understanding these parameters and information of tires, car owners can choose and use tires more reasonably, improving driving safety and comfort.