【The owner's family car knowledge】Recently, the editor has learned some neglected tyre knowledge, and I want to share it with you.
The tire production date will be distinguished, but also anti-counterfeiting:
Tires are rubber products, so rubber aging will also occur. The shelf life of tire rubber is generally 4-5 years. Tire rubber will accelerate aging after the shelf life and cause tire performance to decline.
As shown in the figure above, "9MCR0810" is the tire production date code. Among them, the last 4 digits "0810" indicate that this tire is a product produced in the "8" week of the "10" year.
Reading the production date of tires does not mean that the tires you buy must be new. Some unscrupulous businessmen modify the production date markings on tires through special molds, and sell tires with expired inventory as brand new tires, earning a high price difference. Generally speaking, unscrupulous businessmen achieve the purpose of tampering with the production date of the tire by polishing or removing the production date mark on the original tire, and then attaching a new mark. Therefore, the production date markings of these "rescheduled tires" and the tires are not a whole, and there are usually seams or unevenness on the edges of the markings. When buying
【The owner's family car knowledge】Recently, the editor has learned some neglected tyre knowledge, and I want to share it with you.
The tire production date will be distinguished, but also anti-counterfeiting:
Tires are rubber products, so rubber aging will also occur. The shelf life of tire rubber is generally 4-5 years. Tire rubber will accelerate aging after the shelf life and cause tire performance to decline.
As shown in the figure above, "9MCR0810" is the tire production date code. Among them, the last 4 digits "0810" indicate that this tire is a product produced in the "8" week of the "10" year.
Reading the production date of tires does not mean that the tires you buy must be new. Some unscrupulous businessmen modify the production date markings on tires through special molds, and sell tires with expired inventory as brand new tires, earning a high price difference. Generally speaking, unscrupulous businessmen achieve the purpose of tampering with the production date of the tire by polishing or removing the production date mark on the original tire, and then attaching a new mark. Therefore, the production date markings of these "rescheduled tires" and the tires are not a whole, and there are usually seams or unevenness on the edges of the markings. When buying tires, consumers should pay attention to whether there are seams or unevenness on the edge of the tire's production date marking position, so as to avoid buying inferior "rescheduled tires".
Pay attention to the inner and outer directions when installing the tire:
The reverse installation of the inner and outer sides of the tire will greatly reduce the drainage performance and grip performance of a single-guide or asymmetric tire. If you find that the tires are reversely installed inside and outside, please go to the repair shop to reinstall the tires immediately.
The outside of the tire will generally be printed with the words "OUTSIDE", the date of manufacture or the "DOT" mark. The outside of the tire can be judged by one of these three types of marks.
The lightest point mark on the tire wall:
As a composite rubber body, the mass distribution of tires is difficult to achieve absolute uniformity. Therefore, some manufacturers will mark the lightest point of the tire on the sidewall of the tire. The wheel is mainly composed of three parts: wheel hub, tire and valve. The position where the valve is installed on the wheel hub has the greatest quality. Therefore, when installing the tire, the lightest point of the tire should be installed corresponding to the valve, which plays a complementary role to balance the overall mass distribution of the tire.
The mark of the maximum vibration point on the tire sidewall:
The maximum vibration point of the tire identifies the maximum point of the tire's longitudinal rigidity. When the tire rotates one circle, the point of maximum vibration is at the position marked by the point of maximum vibration. When a tire rotates on the ground once, the vibration force it bears at every angle it passes through is not equal. This phenomenon is called RFV (Radial Force Variation). When the RFV is too large, the tire will produce vibrations that can be perceived by the driver, which affects the driving comfort of the vehicle. Generally, large tire manufacturers will mark the position of this point on the tire during product inspection. If the vibration value of the tire product is found to exceed the standard, it will be treated as a waste product. The tire maximum vibration point mark is of little significance to consumers, so you will not see such a mark on all products in the market. However, RFV parameters are an important criterion for the uniformity of tire material. RFV testing is a product quality inspection process that tire companies must carry out during production.
Summarize:This article introduces 4 little-known tire tips. These include: modified tires, tire outside markings, lightest point markings, and maximum vibration point markings. Observe carefully when buying tires to avoid buying "rescheduled tires." When installing tires, pay attention to the lightest point that corresponds to the valve on the wheel hub. At the same time, the outside of the tire must face outwards when installing. Do the above 3 points and maintain the tires in a reasonable way to ensure your tire safety.
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