What does 84H on a tire mean?
4 Answers
Tire 84H indicates the load index and speed rating of the tire. The meaning of tire 185/60R15 84H is: 1. 185: Refers to the tire width of 18.5 cm. 2. 60: Indicates the aspect ratio, which is the ratio of the sidewall height to the tread width. 3. R: Means the tire is a radial tire (constructed with radial ply cords). 4. 15: Represents the rim diameter of 15 inches. 5. 84: The load index, where 84 means the tire can carry a maximum load of 500 kg. 6. H: The speed rating of the tire, indicating the maximum speed the tire can sustain under specified conditions with its rated load, with H representing a maximum speed of 210 km/h.
I just researched tire parameters last week. The 84H actually contains two important indicators: 84 is the load index, indicating that a single tire can bear a maximum load of 500 kilograms. H is the speed rating, meaning this tire can withstand speeds up to 210 km/h. Common combinations for regular family cars are like 91V, while 84H is mostly used on compact or micro cars. A reminder to everyone: when changing tires, it's best to have all four tires with the same parameters to avoid uneven load distribution, which could cause veering or abnormal braking.
Last time a relative asked about tire replacement, I specifically checked the string of letters and numbers on the sidewall of the tire. In '84H', the '84' indicates that the tire can bear a maximum load of 500 kilograms, while 'H' represents a speed limit of 210 km/h. This rating is commonly used for compact cars, such as the older Honda Fit which often comes with this type of tire. If the load capacity is insufficient, climbing steep slopes can easily lead to a blowout, and exceeding the speed limit can cause the tire to overheat and deform. I recall a car owner who switched to tires with a different rating, and the grip during high-speed cornering was significantly worse.
Explanation of this common parameter: 84 is the load index code, corresponding to a maximum load capacity of 500 kg; H is the speed symbol, supporting speeds up to 210 km/h. This combination is commonly seen in compact cars, such as vehicles the size of a POLO. It's crucial to avoid overloading - the actual load should preferably not exceed 82% of the marked capacity, leaving sufficient safety margin. Last time I saw a cargo van that blew a tire precisely due to overloading.
