The knowledge of car tyres you need to know
Oct 09, 2024
1. You need to be able to check the production date of the tire and also be able to prevent counterfeiting. Rubber products have a service life, that is, a shelf life. For example, the sealing strip of a car door may crack or seal poorly over time. As a type of rubber product, tires also have a shelf life, usually 4-5 years. After the tire is out of warranty, it may experience aging, cracking, surface hardening, and other phenomena, which affect the safety of driving. When tires leave the factory, the production date is marked on the side. As a car owner, you should learn to check the production date of your car's tires. Not only can you grasp the time when your car changes tires, but you can also distinguish whether they are in stock when buying new tires. The DOT in the red box in the above picture represents some information about this tire, and the four-digit "3311" after it represents the production date of the tire. The one in the picture was produced in the 33rd week of 2011, which is mid-August 2011. When buying tires, you need to check the production date, but you cannot completely trust it. Some unscrupulous merchants use tools to modify the production date markings on tires and sell inventory tires as new tires. This type of tire mainly depends on whether the area marked on the tire is integrated with the tire, whether there are seams or unevenness at the edges. Unscrupulous vendors mainly polish off the original production date and stick a new production date to achieve the purpose of refurbishing.
2. When installing tires, pay attention to the installation direction and inner and outer sides. During normal use, car owners may encounter situations such as tire puncture or replacement. At this time, it is necessary to remove the tire and detach it from the wheel hub. But when installing the good tire onto the wheel hub, it may be installed backwards. There will be markings on the outside of the tire, indicating that it should be installed towards the outside.
3. The lightest point on the tire, I believe, most car owners don't know about it. As a rubber product, the quality distribution of tires cannot be completely uniform. Therefore, manufacturers will label the lightest point on the tire, which usually corresponds to the valve on the contour. Because the valve is installed on the contour, this position has the highest mass, and the lightest point of these two tires corresponds to the most important point of the contour, which can play a balancing role. The lightest point of a tire is usually marked with a yellow dot. The lightest point of the tire can also correspond to the counterweight added during dynamic balancing, achieving the effect of balance.
4. The maximum vibration point of the tire is marked with the maximum point of longitudinal rigidity of the tire. During one rotation of the tire, the point of maximum vibration is located at the position marked by the maximum vibration point, which is called RFV. When the RFV is too large, the driver will feel the vibration inside the car, affecting comfort.
However, consumers do not need to worry about the RFV label on the tires of their cars. This indicates that the manufacturer has tested the vibration points, and the significance of this label to consumers is not significant.
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