What Does the Tire Model Number Represent?
2 Answers
The tire model number represents the tire's width, aspect ratio, tire type, and the applicable size of the tire. Taking the model 225/60R17 as an example, 225 indicates that the tire section width is 225mm, 60 is the aspect ratio, meaning the height of the tire sidewall is 60% of the tire section width, R stands for radial tire, and 17 means the tire is suitable for a 17-inch wheel hub. Automotive tires are one of the essential components of a vehicle, directly in contact with the road surface. Together with the vehicle's suspension, they help absorb shocks encountered during driving, ensuring good ride comfort and smooth driving; they ensure excellent adhesion between the wheels and the road surface; they improve the vehicle's traction, braking, and off-road capability; and they bear the weight of the vehicle. The crucial role tires play in automobiles is increasingly being recognized by people.
The model numbers on tires are like a code, and it took me changing tires a few times to understand their meanings. For example, 205/55 R16 91V: 205 is the width in millimeters—the larger the number, the wider the tire, which improves grip but increases fuel consumption; 55 is the aspect ratio, meaning the height is 55% of the width—a higher ratio provides a smoother ride but slightly worse handling; R stands for radial construction, which is standard for modern tires and more durable than older types; 16 is the rim size in inches—it must match the original wheel rim, so don’t change it randomly; 91 is the load index—the higher the number, the greater the load capacity, with small cars typically around 600 kg; V is the speed rating, indicating a maximum speed of 240 km/h—don’t exceed this limit when driving fast. Always check your vehicle’s manual when selecting tires—safety comes first. This knowledge has saved me a lot of trouble and helped avoid the risk of blowouts.
