What does 91w tire mean?
3 Answers
91w tire indicates that the load capacity rating of the tire is 615kg, and the maximum speed rating is 270km/h. Under the corresponding load capacity of the relevant load index, each letter represents the maximum speed allowed by the tire. These two factors together are referred to as the service description, and they are interdependent. For various information parameters of tires, international standards require them to be marked on the tire sidewall, including the basic model parameters, load capacity rating, and speed rating of the tire. The basic model parameters of the tire can be directly interpreted through the marked numbers, but the load capacity rating and speed rating need to be checked against a reference table for corresponding parameters.
The 91W in tire specifications actually refers to two key indicators. 91 is the load index, indicating that the maximum load capacity of this tire is 615 kilograms, suitable for general passenger vehicles. W is the speed rating symbol, representing a maximum speed capability of 270 kilometers per hour, which is more oriented towards high-performance vehicles. When selecting tires, it's important to refer to the recommended specifications in the vehicle's manual, as mismatches can increase risks. For example, using the wrong speed rating can lead to overheating of the tire during high-speed driving, increasing the likelihood of a blowout or reduced grip, which is quite dangerous. From my experience, it's crucial to pay attention to tire maintenance during regular driving, including periodic checks on tire pressure and wear. In summer, when temperatures are high, the demands on the speed rating increase in hot environments, so it's advisable to choose tires that match the vehicle model. When replacing tires, don't just go for the cheapest option; high-quality tires, though more expensive, offer better safety.
Seeing the 91W tire marking reminds me of my last tire replacement experience. The 91 in 91W indicates the load index, with a standard load capacity of 615 kg, suitable for most family sedans. The W represents the speed rating, allowing a maximum speed of 270 km/h, which is useful for highway driving. I often tell my friends not to overlook tire specifications, as choosing the wrong ones can affect handling and safety. For example, if the load index is too low, the tires can easily get damaged when the vehicle is overloaded. In winter, insufficient grip can lead to skidding on slippery roads. Before changing tires, it's best to check the manual or consult a professional to understand the recommended specifications for your vehicle. Regular checks of tread depth and tire pressure during daily driving can extend tire life and reduce accidents. Safety comes first—don’t skimp on costs.
