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 picture above, “9MCR0810” is the tire production date code. Among them, the “0810” in the last 4 digits of * indicates that this tire is a product produced in the “8” week of the “10” year.
will look at the tire production date does not mean that the tire 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 marks of these “rescheduled tires” and the tires are not a whole, and there are usually seams or unevenness on the edges of the marks. When buying tires, consumers should pay attention to whether there are seams or unevenness at the edge of the tire’s production date marking position to avoid buying inferior “rescheduled tires”.
When installing the tire, pay attention to the inner and outer directions:
Tire inner and outer reverse installation will greatly reduce the drainage performance and grip performance of single-guide or asymmetric tires. 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 is usually printed with the words “OUTSIDE”, the production date or the “DOT” mark. The outside of the tire can be judged by one of these three types of marks.
The *tap mark on the tire wall:
As a composite rubber body, the mass distribution of tires is difficult to be absolutely uniform. Therefore, some manufacturers will mark the tire * lightly 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 highest quality. Therefore, when installing the tire, the tire * should be lightly marked corresponding to the valve installation, which plays a complementary role and makes the overall mass distribution of the tire tend to be balanced.
The maximum vibration point mark on the tire wall:
The maximum vibration point of the tire indicates the maximum point of longitudinal rigidity of the tire. When the tire rotates one circle, the maximum vibration point is at the position marked by the maximum vibration point. 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 generate 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 standard for the uniformity of tire materi al. RFV testing is a product quality inspection process that tire companies must carry out during production.