As the "four legs" of a car, tires play a very important role in our driving process, and also have a certain impact on our driving safety. Therefore, before we go on the road, we must first check the tire pressure and the degree of tire wear. In fact, many friends have doubts about the service life of tires. So, how long is the service life of tires?
Tires have a service life. When buying a car normally, 4S stores will remind you that tires need to be replaced every three years. However, when many car owners actually use it, it is common for them to use it for 5 or 6 years without loss. Why do 4S stores choose 3 years as the replacement cycle? For this reason, the editor specially consulted a professional maintenance master.
Tires are made of rubber, cord, steel wire, carbon black and other additives. After the manufacturer makes them, they will be stored for 8 months to 2 years, waiting for the oil to be completely released, giving the rubber molecules a stable period, and waiting until they are wear-resistant. After the temperature reaches the standard, it can leave the factory, and consumers don't have to wait any longer, they can pick it up and change it at any time.
The reason why tires have a useful life is actually because rubber, the core material that makes up tires, will age. Once the rubber ages, it is undoubtedly fatal to driving safety. However, the tire companies are currently making more and more advanced formulas, and the delay of rubber aging is also getting stronger. Therefore, it is not possible to absolutely set a time, but to observe the aging of the tire surface to judge whether it is necessary to replace the tire. Of course, damage caused by driving behavior is not included, such as bumping, bulging, scratching, and crashing.
The maintenance master said that when the tire leaves the factory, there will be various marks on the tire, including the service life of the tire. This is a fixed value, which comes from the value selected by the manufacturer according to the test. Normally, 3 years and 5 years are more. It may be conservative, car companies will set up relatively small, and the same is true for 4S stores. In addition, the profit of buying a car in a 4S shop is not high, and maintenance and repairs are the big part. Therefore, the sales of a 4S shop will choose a shorter period of 3 years instead of 5 years.
It is also very easy to understand the service life of tires. There are many tire marks on the rim. Normally, the last four numbers of DOT, the first two represent the week, and the last two represent the year. For Dunlop tires, look for the bead position carefully. The four numbers together are relatively large. The first two represent the week and the last two represent the year. Some tires will have their production dates changed, so pay attention when buying them.
The maintenance master said that normally, it is more appropriate to replace the tires in 6 years. At this time, after long-term use of the tires, coupled with the oxidation of sunlight and air, the aging degree of the tires will be obvious. Watch the edge for rubber cracks, if no obvious cracks are found, you can continue to use it. If the cracks are dense, continued use will increase the chance of a flat tire. Even if the time is not up, it can be replaced.
Generally speaking, if you often drive on the road and the road conditions are average or good, you will need to replace it after driving about 150,000 kilometers. If you often drive 80,000 to 100,000 kilometers on gravel roads, dirt roads and other poor road conditions, you can consider replacing tires. Although the tires can be used for a long time, for the sake of safety, friends, they should be replaced in time. How often do you change tires?