What does 91V and 91W mean on tires?
3 Answers
Tire markings 91V and 91W indicate the maximum speed they can sustain. Below are detailed explanations about tires: 1. Definition: A tire is a circular elastic rubber product mounted on various vehicles or machinery for ground rolling. Typically installed on metal rims, it supports the vehicle body, absorbs external shocks, ensures contact with the road surface, and maintains driving performance. Tires operate under complex and demanding conditions, enduring various deformations, loads, forces, and temperature extremes during use. Therefore, they must possess high load-bearing capacity, traction performance, and shock absorption. Additionally, they require excellent wear resistance, flexibility, low rolling resistance, and heat generation. Half of the world's rubber consumption is used in tire production, highlighting their significant rubber usage. 2. Primary Functions: Tires are one of the most critical components of a vehicle. Their main roles include supporting the vehicle's entire weight and bearing its load; transmitting traction and braking torque to ensure wheel-road adhesion; reducing and absorbing vibrations and impacts during driving to prevent severe vibrations and premature damage to vehicle parts; adapting to high-speed performance while minimizing noise for safety, handling stability, comfort, and fuel efficiency.
The markings 91V or 91W on a tire refer to its specifications. The number 91 indicates the load capacity, meaning the tire can support a maximum weight of 615 kilograms. The letters V or W denote the speed rating. A V rating corresponds to a maximum speed of 240 km/h, while W is 270 km/h, indicating that the tire is designed to operate safely at these speeds. I remember from years of driving that on rainy highways, if the tire's speed rating is too low, the car is more prone to skidding or blowouts. Therefore, it's crucial to match the tire specifications with those recommended in the vehicle's manual. Additionally, in daily use, avoid overloading or speeding, and regularly check tire pressure and tread wear. If the tread is worn shallow, replacing the tire promptly ensures safer driving. The tire rating affects handling performance, so when buying new tires, don't just focus on price—choosing the right rating can enhance driving stability.
These markings indicate the basic specifications of the tire. The number 91 represents the load-carrying capacity, equivalent to 615kg. The letters V or W denote the maximum permissible speed, with V standing for 240km/h and W for 270km/h. In reality, based on my experience driving different vehicles, choosing tires depends on the specific needs of the car model. For ordinary family cars, a V rating is sufficient, but if you frequently drive on highways, a W rating is recommended to prevent tire deformation due to overheating at high speeds. Additionally, tire size is also related to the season, as summer tires are prone to heat buildup, so don't overlook the speed rating for safety. Before purchasing new tires, consult the manual or seek advice from the store to avoid selecting the wrong specifications, which could shorten tire lifespan or increase accident risks. Regular checks on tire pressure and maintenance can enhance safety, a point I highly emphasize.
