What does the number 91v on car tires mean?

[CarmenAnn]

Car tire 91v indicates that the tire has a load index of 615kg and a speed rating of 240km per hour. The following are the effects of overloading on tires: 1. Severe overloading or uneven loading of the vehicle: This can cause the tire to operate under extreme load, increasing the bending deformation of the tire sidewall, expanding the contact area with the ground, accelerating tire wear and damage, and making it prone to tread blowout when encountering obstacles. 2. Hazards: Overloading and exceeding limits of vehicles seriously endanger the lives and property safety of the country and the people, induce a large number of road traffic accidents, and cause huge losses to people's lives and property due to overloading and exceeding limits in transportation.

[MacElliot]

Last time when changing tires, the mechanic specifically taught me to recognize these codes. The combination of numbers and letters '91V' is crucial. 91 represents the tire's maximum load capacity of 615 kg, which is the limit for a single tire. With four tires on my SUV, it can carry nearly 2.5 tons in total. V is the speed rating letter, corresponding to a maximum speed limit of 240 km/h. It's particularly important to ensure that the load index is consistent on the same axle for rear-wheel-drive vehicles when replacing tires, otherwise, the car may easily skid when turning in the rain. A friend of mine once mixed tires with different load indices to save money, and the steering wheel shook like a phone vibrating when driving on the highway. In the end, he had to come back and replace the whole set.

[DeJune]

The 91V marking is like an ID card for tires, recording their performance limits. The load index of 91 means each tire can carry three to four adults plus luggage, specifically 615 kilograms. The letter V indicates the tire is designed for speeds up to 240 km/h, but experienced drivers know it's best not to push it that hard. Some tires have H or T on the sidewall, which lowers the speed limit to 210 or 190 km/h respectively. When choosing tires, consider your vehicle's needs—performance cars require higher speed ratings, while family cars should focus more on load indexes to ensure safety when fully loaded.

[GenesisMarie]

The 91V rating essentially serves as a performance ID for tires. The number 91 represents the standard load index, corresponding to a maximum load capacity of 615 kg. The letter V ranks in the second tier of tire speed ratings, permitting sustained speeds up to 240 km/h. Critical considerations: an axle load index differential exceeding 3 grades may cause braking deviation, while each downgrade in speed rating (e.g., V→H) reduces maximum speed by 30 km/h. Recent auto repair shop statistics show that 31% of abnormal wheel wear cases result from mixing tires with different rating specifications.

[MadisonAnn]

The 91V is like a tire's size label and proof of athletic ability. 91 means it can withstand a load of 615 kilograms, while the letter V indicates it can accompany you at speeds up to 240 km/h on the highway. When choosing tires, I always double-check these two parameters. Last time, when helping my best friend pick tires, I found that her station wagon originally came with 94V tires, but she wanted to switch to cheaper ones. The 91V tires she found had nearly 100 kilograms less load capacity. In the end, I convinced her to stick with the original specifications, especially since when the trunk is fully loaded with camping gear, the tires need to handle the weight to ensure a worry-free trip.