Can long-term storage of tires be used

Maintenance personnel sometimes encounter the user to ask such a question: When I buy a new car, I will replace all the original car tires. These tires have been placed for 2 years and they are all new tires. Are these tires reusable? Anyone who sells tires will also have tire storage issues. How to store tires is correct?

Tires are made of rubber and other raw materials.

It has the best use period. In general, tires should be used within five years of production, and the specific production time can be found on the tire's sidewall. After this period, even if the tire looks good, there is a danger of breakage during use. When buying a tire, you should check the production time of the tire. If the tire has not been left for more than 5 years and the visual appearance is not damaged, it can be used continuously.

The correct way to store tires The new tires or remove the tires that are not in use temporarily are not simply placed. If they are not stored properly, the service life of the tires will be affected. How tire storage environment, it should also be used as a study of whether the tire shop management is perfect.

(1) The tires should be stored in a dry warehouse, avoid sun and rain, and should not be excessively ventilated. Large-scale tire warehouse should be equipped with a thermometer and hygrometer, the temperature should be controlled at -10 ~ +30 °C, relative humidity of 50% ~ 80% is appropriate. Place the tire away from sources of heat, power generation equipment, and where ozone can be generated to prevent tire oxidation. Tyres should not be placed together with flammable substances and chemicals such as oils, acids, and alkalis. (2) Tires packaged should be placed vertically on shelves. Long-term placement of tires should be periodically rotated to change the fulcrum, so as not to cause tire deformation.

(3) When the tire and the rim are stored together, they should be slightly inflated so that the tire can withstand a certain amount of pressure.

(4) During the storage of the tires, they should be stored in batches according to the time of production or storage, first-in, first-out, and in order.

After a long period of storage, tires are prone to some problems. For example, some users report that when the tires are removed and left unused for a period of time, there is an increase in driving noise. This is indeed a manifestation of improper storage of tires. However, there are many reasons for the increased tire noise. Let's analyze the causes of the tire noise.

Tyre Noise There are many types of noise generated during vehicle driving, such as engine noise, transmission noise, body noise, and tire noise. On dry roads, when the car is driving at high speed, tire noise becomes an important source of noise for the vehicle. On wet roads, even if the vehicle speed is low, the noise generated by the tires will exceed the noise as the main source of noise. Tire noise comes from the pumping effect and tire vibration. The so-called pumping effect refers to the deformation of the tire caused by the high-speed rolling of the tire, which causes the air between the tire tread and the road surface to be squeezed. As the tire rolls, the air is released when the tire leaves the contact with the ground. “Squeeze release”, the air will make a sound, and the faster the speed, the louder the sound, and the heavier the sound of the vehicle (Figure 2). Tire vibration is related to the stiffness and damping of the tire. As the stiffness increases (for example, the number of tire plies increases), the damping decreases, the vibration of the tire increases, and the noise increases. In order to reduce the tire noise can be used in many ways, such as the tread can use a variety of pattern spacing, the use of high damping rubber material, adjust the tire dynamic balance to reduce the self-excited vibration.

In addition to the noise generated in the normal use of the tire, if the tire maintains a posture for a long period of time, the tire's pressured side will be deformed and the tire noise will increase. This situation also occurs on vehicles parked for a long time. The part of the tire that touches the ground is deformed by pressure for a long time, and the noise during driving increases. Therefore, when the vehicle needs to be parked for a long time, it should be parked for a period of time while parking. Inaccurate tire inflation pressure or abnormal tire tread wear, tire noise will increase, so we must pay attention to the tire's daily maintenance.

In order to prevent various noises from being introduced into the vehicle during driving, in addition to minimizing noise sources, it is also possible to work on the sealing structure of the cabin, in particular, to improve the sealing and sound insulation performance of the body cowl and the floor.