What is the meaning of tire specifications?
2 Answers
Tire specifications are commonly represented by a set of numbers. Here is an explanation of the relevant content: 1. Meaning of the numbers: The first number indicates the tire section width, and the latter one represents the rim diameter, in inches. 2. Example: For instance, 205/55R19 denotes a radial tire with a width of 205 millimeters, an aspect ratio of 55, and a rim diameter of 19 inches. Below is extended information about car tires: 1. Impact absorption: Car tires are one of the essential components of a vehicle, directly in contact with the road surface, working together with the car suspension to absorb shocks encountered during driving. 2. Comfort: They ensure good ride comfort and smooth driving, maintain excellent adhesion between the wheels and the road surface, enhance the vehicle's traction, braking, and off-road capability, and bear the weight of the car.
I've been driving used cars for over a decade and have a thorough understanding of tire specifications. Take the common 205/55R16 as an example: 205 represents the tread width in millimeters—the larger the number, the wider the tire, which improves stability at high speeds but may increase fuel consumption. The 55 is the aspect ratio, indicating that the tire's height is 55% of its width. A lower number means a flatter tire, which offers better cornering but a harsher ride, while a higher number provides more comfort, ideal for city driving. The R stands for radial construction, which is standard for most modern cars. 16 is the wheel diameter in inches—when changing wheels or tires, this must match. Also, don’t overlook markings like 91V: 91 is the load index, meaning each tire can handle 615 kg, and V is the speed rating, with a maximum of 240 km/h. Using the wrong specifications can lead to faster wear and poor handling—I once put the wrong tires on my old car and nearly skidded in the rain. So, always check the manual for the factory specs before buying or replacing tires.
