What does 91W on tires mean?
4 Answers
Tire 91W refers to the load index of the tire, indicating that the maximum load capacity of a single tire is 615 kilograms, and the maximum speed it can withstand is 270 kilometers per hour. The functions of tires are: 1. Transmitting driving force, braking force, and steering force to achieve vehicle operation; 2. Supporting vehicle loads; 3. Reducing and absorbing vibrations and impacts during driving to avoid severe vibrations damaging vehicle components. Tire maintenance methods include: 1. Regularly cleaning stones from tire treads; 2. Minimizing exposure to sunlight; 3. Promptly checking tire pressure; 4. Paying attention to suspension maintenance; 5. Regularly inspecting front wheel alignment; 6. Adopting careful driving habits, choosing smooth road surfaces, avoiding objects that can puncture or scratch tires, and steering clear of chemical spills that may corrode tires.
I've been in the automotive repair industry for many years and have seen too many accident cases caused by ignoring tire codes. 91W refers to the tire's specification parameters - 91 is the load index, indicating the maximum safe weight a single tire can bear is 615 kg, while W is the speed rating, meaning the tire's designed maximum safe speed is 270 km/h. These aren't just random numbers; they're core to driving safety. If you drive an SUV carrying heavy loads exceeding the weight limit, the tires can easily fatigue and burst; when speeding on highways beyond the W rating, overheating tires will wear rapidly or cause accidents. I always remind vehicle owners to match new tires with their vehicle manual's recommended specifications and regularly check tire wear and pressure. Ignoring this could mean needlessly spending more on tire replacements at best, or affecting braking performance and causing disasters at worst. Don't think these small numbers are insignificant - they're crucial for your safety.
As someone who commutes by car every day, I personally experienced a sudden tire blowout that gave me a cold sweat before I started paying attention to these markings. 91W means this: 91 indicates the tire can withstand a load of 615 kilograms, and W means it can handle a maximum speed of 270 km/h. As ordinary car owners, we should try to avoid overloading or excessive speeding, such as when the trunk is fully loaded while climbing a hill or when racing on the highway. I check my tires weekly for any abnormal wear. When buying tires, don’t just look at the price—choose based on your car’s needs. For example, my small sedan isn’t suitable for high-load tires, as they waste fuel and are unsafe. Remember, these small parameters aren’t just for show; ignoring them significantly increases the risk of a blowout, especially during rainy seasons when roads are slippery. Developing good habits saves money and ensures safety, preventing breakdowns that could disrupt your plans.
I create short car knowledge videos, often explaining these markings to young people. 91W on tires is super simple: 91 is the load index, meaning each tire can carry 615 kg; W is the speed symbol, indicating a maximum speed of 270 km/h. Why does this matter? Because if the car's weight changes or you drive too fast, the tires might not hold up. Picture a car packed with luggage speeding down the highway—exceeding these numbers is risky. Why should everyone pay attention? Matching new tires to your needs ensures safety and durability. Easy to understand, worry-free driving.
