What does the 'H' on small car tires mean?

[DelJaxson]

Automobile tire 'H' refers to the speed rating of the tire, which indicates the speed at which the tire can carry a specified load under defined conditions. Tires are circular elastic rubber products assembled on various vehicles or machinery, mounted on metal rims to support the vehicle body, cushion external impacts, achieve contact with the road surface, and ensure the vehicle's driving performance. The steps to replace a car tire are: 1. After parking and turning off the engine, use the handbrake to secure the vehicle; 2. Place heavy objects in front of and behind the wheels to prevent sliding, and set up a triangular warning sign behind the car; 3. Use a wrench to loosen the lug nuts of the tire to be replaced in a diagonal pattern; 4. Position the jack on the side of the vehicle where the tire needs to be replaced and lift the vehicle to a certain height; 5. Remove the lug nuts and take off the tire; 6. Install the spare or new tire, tightening the lug nuts in a diagonal pattern; 7. Lower the vehicle by releasing the jack and ensure that all lug nuts and bolts are securely tightened.