What does 91h on a tire mean?

[Albert]

Tire 91h indicates that the maximum load capacity of a single tire is 615Kg, and the maximum speed it can withstand under the specified load is 210KM/h. Here are the relevant details: 1. 91 is called the load index, and the maximum load capacity of 615Kg can be determined by referring to the tire load index chart. 2. H is called the speed rating. Additional information: Whether it's the speed rating or the load index, during daily driving, you should operate within the specified limits of the speed rating or load index. Otherwise, there could be significant safety hazards. Additionally, when replacing tires, it's important to note that you should not mix tires of different types, models, or tire structures.

[MacAndrew]

I've seen many people overlook those small numbers when buying tires, but 91H is actually quite important. 91 is the tire's load index, indicating each tire can bear 615 kilograms. If your car is heavy or you often carry loads, you must choose a sufficiently high index; otherwise, the tires may wear out prematurely or even burst. H is the speed rating, meaning the tire can safely travel up to 210 kilometers per hour, which is especially crucial when driving on highways. I believe choosing tires isn't just about the brand; they must also match the vehicle's manual recommendations. For example, an SUV might need a higher load index. Tire lifespan also affects performance—regularly checking air pressure and wear levels can extend usage, making it worry-free and safe. On rainy or slippery roads, the correct load ensures grip and prevents skidding.

[DelLawson]

Thinking back to my first experience changing a tire by myself, I had no idea what 91H meant. It wasn't until I encountered tire overheating on the highway that I learned my lesson. The number 91 actually refers to the maximum load capacity, with each tire supporting 615 kilograms, while the letter H indicates a speed limit of 210 km/h—both crucial for daily driving safety. Choosing the wrong specifications, such as insufficient load capacity or speed rating, can lead to tire deformation during long trips and increase accident risks. Now, I always recommend checking the original manufacturer's specifications before purchasing and comparing different tire brands to ensure their markings align. These parameters affect braking distance during weather changes, requiring extra caution in summer heat. Keeping tires clean and regularly rotating their positions helps prevent premature replacement, saving money while ensuring family travel safety.

[StAva]

91H is the standard marking for tires, where the load index 91 corresponds to a maximum weight of 615 kilograms, and the speed symbol H indicates a speed limit of 210 kilometers per hour. This design ensures the tire operates safely under specific conditions, and it's crucial to match the vehicle's load and speed requirements. Ignoring this may lead to overload damage or high-speed loss of control, especially on mountain roads or during long-distance driving. I've noticed that choosing tires should consider driving habits—for example, an H rating is sufficient for city commuting, but if you frequently drive at high speeds or carry heavy loads, opting for a higher V rating is advisable. Regularly checking tire pressure and wear can maintain performance and reduce the risk of hydroplaning in rainy conditions.

[JayceFitz]

For families, the 91H on tires is the safety foundation. 91 indicates each tire can bear 615 kilograms, and H limits the speed to 210 km/h, which protects our car's stability during trips. Overloading or speeding will shorten tire life and pose risks. I always remind friends to verify parameters when buying new tires, not to overlook specifications for the sake of saving money. On wet and slippery roads during rain, correct loading ensures traction, keeping children safe during rides. Regular maintenance like checking tire pressure and replacing old tires can prevent sudden failures; it's advisable to refer to the vehicle manual for selection and prioritize routine small checks.