Tyres, as one of the most important and common components in cars, I think we should not be unfamiliar with them. Speaking of tire parameters, many friends know 215/55 R17 and so on, but whether or not everyone noticed In addition to these parameters, there are many other parameters on the tire. These contents have a very important role in our daily driving and the use of tires. These contents may be easily overlooked by us. Today, I took everyone to understand the "passwords" on these tires.
â—† The role of the tire
The primary function of the tires is to carry the weight of the body, followed by the shock absorption. Whether it is QQ, BMW, or Ferrari, Bugatti, despite the strong performance of the vehicle, if there is no tire, it will only become a mobile "Car model."
In terms of shock absorption and lifting, we may think of a shock absorber in a vehicle suspension system. In fact, the tire is also responsible for reducing and alleviating the effects of vehicle vibration and noise while the vehicle is traveling.
â—†The three parameters are most often seen when purchasing a tire
The wider the width of the tire, the greater the ground contact area. Under the premise of the same pattern and the same material, the tire with wider width will have better grip and traction in the straight driving state, but the fuel consumption level will increase accordingly. Therefore, we must weigh the pros and cons when we regularly replace and upgrade tire specifications.
The flat ratio refers to the ratio of the height from the rim to the tread to the maximum width of the tire's cross-section measurement, expressed as a percentage, that is, the height as a percentage of the width.
R stands for the radial tire. The radial tire refers to the direction in which the inner braid of the tire is aligned with the center line of the tread at an angle of 90 degrees. It is named after the meridian on the globe. Generally, the crown portion of the tire will increase the wire layer, so that it can withstand greater internal pressure stress, with the characteristics of the tread is not easy to deform, better ground grip and stability, more suitable for high-speed driving. Radial tires are now commonly used in cars.
◆Speed ​​grade/load index
Tires are mainly composed of polymer composites, and elevated temperatures will accelerate rubber aging. When the car is driving at a high speed, the temperature of the entire tire will increase, which will lead to increased tread wear. The tires will have critical speeds for their design. When this speed is reached at high speeds, the tire will have a "standing wave" phenomenon. This is the "critical speed" of the tire. If it is used under this condition, there is a danger of the tire bursting.
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