What does 99H mean on a tire?
2 Answers
99 represents the tire's load index of 775KG, and H represents the tire's speed symbol of 210KM/H. The following is a related introduction about tires: 1. Tire introduction: Tires are circular elastic rubber products assembled on various vehicles or machinery for ground rolling. They are usually mounted on metal rims, supporting the vehicle body, cushioning external impacts, achieving contact with the road surface, and ensuring the vehicle's driving performance. Tires are often used under complex and demanding conditions, enduring various deformations, loads, forces, and high and low temperatures during operation. Therefore, they must have high load-bearing performance, traction performance, and cushioning performance. At the same time, they are also required to have high wear resistance and flex resistance, as well as low rolling resistance and heat generation. Half of the world's rubber production is used for tire manufacturing, highlighting the significant rubber consumption by tires. 2. Tire specifications: There are three methods for representing tire specifications: A. Metric (m); B. Mixed metric and imperial; C. Imperial; Imperial tire specifications are commonly represented by a set of numbers, where the first number indicates the tire section width, and the second number indicates the rim diameter, both in inches.
The meaning of 99H on tires is that 99 is the load index, indicating each tire can carry approximately 775 kilograms, and H is the speed rating, meaning the tire's maximum safe speed is 210 kilometers per hour. I notice many friends overlook this when buying a car, but it's crucial for driving safety. If you frequently drive on highways or carry heavy loads, make sure the tire specifications match the vehicle's requirements. Otherwise, the tires may overheat, deform, or even blow out. Remember to check your car's tire size, don't opt for lower-rated tires just to save money. Before changing tires, consult the vehicle manual to understand the manufacturer's recommended values. Also, regularly inspect tire wear during maintenance, and maintaining proper tire pressure can extend their lifespan and prevent accidents.
