As we all know, the tire, as one of the important parts of the car, rubs with the ground every day, and most of the vehicle's performance is also achieved by the tire. However, some knowledge about the tire may not be clear to even veteran drivers. Today, we will give you a good spread of relevant knowledge.
We usually see a series of numbers on the tire, such as 185/55 R15. Among them, 185 indicates that the width of the tire is 185 mm, 55 indicates that the flat rate of the tire is 55 percent, R indicates that the radial tire, and the last number 15 indicates that the diameter of the wheel hub is 15 inches.
In fact, the flattening rate is an important indicator to measure the comfort of tires. The tires with high flattening rate have good comfort due to their strong sidewall thickness buffer capacity, but they have poor perception of the road surface and weak lateral resistance when turning; On the contrary, tires with low flattening ratio have shorter sidewalls, larger contact area between the tread and the ground, more sensitive to the road surface, stronger lateral resistance, and better handling, but their comfort will be correspondingly reduced. Some tyres will be marked with the speed grade after the conventional parameters. At present, most models are of U, H, V, W, etc. If there is no specific speed grade, it is usually the speed grade of 120km. As one of the most commonly used auto parts, tire also has its own service life.
If the tire is worn to a certain extent, it needs to be replaced. According to the requirements of China's highway laws and regulations, when the tire tread wear is less than 1.6 mm, it is necessary to replace the tire. In fact, 1.6 mm is the minimum requirement. Usually, when this limit is reached, the tire's water drainage and grip have been greatly reduced, and the safety will also become worse. After comparing the information about tires at home and abroad, it is suggested that the tread depth of tires should be more than 3mm.