What does h stand for in tires?
2 Answers
The h in tires represents the maximum speed the tire can withstand. Tires are one of the important components of a car, and their main functions are: 1. Supporting the entire weight of the vehicle, bearing the load of the car, and transmitting forces and moments in other directions; 2. Preventing severe vibrations and early damage to car components, adapting to the high-speed performance of the vehicle and reducing noise during driving, ensuring driving safety; 3. Transmitting traction and braking torque, ensuring good adhesion between the wheel and the road surface to improve the car's power, braking, and passability, and working with the car suspension to mitigate the impact during driving and dampen the resulting vibrations.
In my years of automotive experience, the 'H' on tires represents the speed rating, indicating the tire is designed to safely sustain speeds up to 210 km/h. In codes like 225/45R17 91H, the 'H' is the most critical letter; if you frequently drive on highways or long distances, choosing the wrong rating such as 'T' (190km/h) may lead to unstable handling or tire overheating. I recommend checking the factory label or manual when purchasing a car to ensure new tires match, which enhances driving safety and fuel efficiency. Remember regular maintenance including checking tire pressure and wear to avoid sudden failures. Consult professional technicians when replacing tires, and never mix different speed-rated tires casually. This is fundamental automotive knowledge that can protect both you and your vehicle for a safe journey.
