What does 99H on a tire mean?
2 Answers
Tire 99 represents the load index of the tire, which is 775KG, and H is the speed rating, representing 210 kilometers per hour. The combination of numbers and letters on a car tire usually refers to the tire specifications, load index, and speed rating. Taking 225/60R17-99H as an example, the meanings of the numbers and letters in the tire model are explained as follows: 1. 225 represents the section width, indicating the width of the tire tread is 225. 2. 60 represents the aspect ratio, which is the ratio of the tire sidewall height to the tire section width, 70%. 3. R represents the tire type code, where R stands for radial tire. 4. 17 represents the rim diameter, indicating the tire is suitable for 17-inch rims. 5. 99 represents the load index of the tire, indicating the maximum weight the tire can bear. 99 means it can bear a weight of 775KG. 6. H represents the speed rating of the tire, indicating the maximum speed the tire can withstand. H means it can withstand a speed of 210KM/H.
The number 99 in 99H refers to the load index, indicating that a single tire can bear a maximum weight of approximately 775 kilograms. The H is the speed rating, representing the tire's designed maximum safe speed of 210 kilometers per hour. My car is equipped with 99H tires, which gives me peace of mind when carrying loads or driving on highways, as overloading or speeding can cause tires to overheat and blow out, especially during hot summer days when extra caution is needed. When selecting tires, it's essential to refer to the manufacturer's recommendations or the manual's requirements. For instance, since my SUV often carries heavy items in the back seat, I prefer models with higher load capacities. Additionally, tires have full codes like 205/55R16 99H, where R stands for radial construction, and 16 is the rim diameter. Understanding these details helps avoid purchasing incorrectly sized tires.
