What do the letters on tires represent in terms of speed?
2 Answers
The letters on tires represent speed ratings as follows: Q is 160 km/h; R is 170 km/h; S is 180 km/h; T is 190 km/h; H is 210 km/h; V is 240 km/h; W is 270 km/h; Y is 300 km/h; Z indicates a speed rating above 240 km/h. Here is additional information: 1. Functions of tires: (1) Support the entire weight of the vehicle and bear the load of the car; (2) Transmit traction and braking torque, ensuring the adhesion between the wheels and the road surface; (3) Reduce and absorb vibrations and impact forces during driving, preventing severe vibrations and early damage to vehicle components; (4) Adapt to the high-speed performance of the vehicle. 2. Tire maintenance methods: (1) Check whether the tire pressure of all tires is normal; (2) Regularly rotate tire positions to ensure even wear and prevent excessive wear; (3) Reduce sudden braking and rapid acceleration.
The letters on the tires are actually speed rating codes, with each letter representing the maximum speed at which the tire can safely operate under normal conditions. For example, common ones include H for 210 kilometers per hour and V for 240 kilometers per hour. I often notice these symbols while driving because if you exceed this speed, the tire may overheat and burst, compromising safety. These speed ratings are set by international standards, so when driving on highways, you must ensure your vehicle's speed doesn't exceed the tire's marked limit. It's crucial to choose tires that match your car's maximum speed to avoid accidents. Additionally, other numbers on the tire sidewall, such as size, are also important, so it's best to check the specifications before buying or replacing tires to avoid choosing the wrong ones.
