What does the 'H' on car tires mean?

[FaithFitz]

Car tire 'H' represents the speed rating of the tire. The speed rating indicates the maximum speed at which the tire can carry a specified load under defined conditions. Here is relevant information about tires: Tires are circular elastic rubber products assembled on various vehicles or machinery to roll on the ground. Mounted on metal rims, they support the vehicle body, cushion external impacts, maintain contact with the road surface, and ensure the vehicle's driving performance. Here are the steps for replacing a tire: 1. After parking and turning off the engine, engage the handbrake; 2. Place heavy objects in front of and behind the wheels to prevent sliding, and set up a triangular warning sign behind the vehicle; 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 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 tire or new tire and tighten the lug nuts in a diagonal pattern; 7. Lower the vehicle by releasing the jack and ensure all nuts and bolts are securely tightened.

[DelJosiah]

I've seen this H mark several times when changing tires myself. It actually refers to the tire's speed rating, meaning this tire can safely handle speeds up to 210 km/h. I remember when I first bought my car, I didn't pay attention to this, and ended up flooring the accelerator on the highway. The tires started humming and heating up. Later, when I took it to the repair shop, the mechanic checked and said the tires couldn't handle such high speeds, making them prone to blowouts or faster wear. Luckily, nothing bad happened that time. So now when choosing tires, I always check the speed rating. The H rating is suitable for most family cars for everyday driving, but if you're someone who often drives on race tracks, you might need to consider higher ratings like V or Z. I recommend friends to regularly check tire tread wear and air pressure, keeping safety as the top priority.

[Rosemary]

I believe driving safety is the top priority. The H symbol on this tire indicates its maximum speed limit is 210 km/h. You know what? If you force the tire to exceed its speed rating, the rubber material will heat up and soften, reducing friction and making it prone to skidding or losing control, especially in rainy conditions or during sharp turns. I personally experienced this once when driving at night on the highway—I pressed the accelerator too hard, and the tires started making strange noises. I immediately slowed down and pulled over to check. Later, when replacing the tires, the mechanic emphasized that the tires must match the vehicle's original speed requirements. For general city driving, H-rated tires are sufficient, but long-distance speed enthusiasts should consider upgrading. Also, as tires age, their performance deteriorates, and even H-rated tires may no longer meet the standard. Therefore, it's best to have a comprehensive inspection at a professional shop every year or so to avoid sudden accidents.

[MacDallas]

Oh, this 'H' is one of the tire speed ratings, simply put, it means the tire can handle a maximum speed of 210 kilometers per hour. Those combinations of letters and numbers on the sidewall of the tire are crucial, such as the common 195/65 R15 91H, where 'H' indicates the speed rating. I recommend paying extra attention to this marking when buying a car or changing tires, as it relates to the vehicle's performance and safety limits. Don't underestimate it—even if you might not exceed this speed in daily driving, choosing the wrong tires can easily increase wear or the risk of a blowout. Developing a habit of regularly checking your tires can save you a lot of trouble.