The side of the tire is the weakest part of the tire. In the process of daily car use, if the owner does not pay attention, it will easily cause side injury. Although tyre manufacturers do not recommend the repair of the side of the tire, they replace the new tire directly, but if there are some small breakages on the side of the tire, it is very extravagant for the ordinary car owners to discarded the tires. Then, can the tire side damage be repaired? Next, let's briefly discuss this problem. Why is it difficult to repair? We have looked at the tire auditorium of the major tire manufacturer's official website, and found that all manufacturers do not recommend that the user repair the tire sidewall. Take Michelin for example, their view is that the tire cord has broken after the tire side is damaged and the tire has a hidden danger in the drum, so it is necessary to replace the new tire as soon as possible. Although tire manufacturers do not recommend repairing the sidewall, there is still a service to repair the tire side. At present, the main ways to repair the sidewall are cold patch (adhesive), hot patch (hot melt rubber) and mushroom pin repair. The adhesive is easy to operate, and can repair larger wounds, but it is not durable enough. As time goes on, the glue on the wound will gradually fall off and the wound will leak again. The hot patch is to attach the special raw rubber to the wound, then bake it through the baking machine until the raw rubber is completely attached to the tire. However, the hot patch is easy to damage the tire cord, resulting in the consequences of collapse, but increases the tire risk. Therefore, the hot patch is not very suitable for the patching of the side of the fetus. The puncture hole diameter less than 6 millimeters can be repaired for some small fetal side wounds, because there is no serious damage to the cord layer, so it still has the value of repair, for example, a small hole is pierced by the edge of the fetal side. This kind of perforation usually does not break the cord on the cord, which is equivalent to using the needle to pierced the cloth but not damaging the cloth, so it can be repaired. In view of this small area of fetal side wounds, professional tire service shop will use a special steel needle plug on the side of the tire (commonly known as "mushroom nail") to repair. The whole patching process takes about 7 minutes, and the price depends on the tire size and tire quality. The price ranges from $60 to $200. The advantage of using mushroom pin to repair the side of the tire is that it can not only repair the airtight layer, but also fill the carcass at the perforation to ensure that the repair effect is more durable. The rubber on the side of the tire is missing or cracked, but it can be repaired without air leakage. If the tire has no air leakage, then the rubber missing or cracking on the shallow side of the fetal side can be repaired. In this case, because there is no penetrating injury to the tire, it is only a surface rubber damage, so the hot side can be used to repair the rubber side. When there is a drum on the side of the tyre that does not repair the tire on the side of the tire, it is the result of the serious fracture of the tire cord inside the tire. In this case, the tire has been sentenced to "death penalty", and there is no value for any repair. New tires must be replaced. If repaired, the repaired tire can only be a dangerous product that may burst at any time. When the fetal side is seriously damaged, it is impossible to repair the so-called "serious damage", which means that the rubber on the side of the tire is completely cracked. Rubber cracking means that the airtight layer, ply, protective layer and other structures of the tire have been completely destroyed, and tires can only be scrapped. The tire that has been repaired can be used as a spare tire, but it can be repaired while the side of the tire is not seriously damaged, but the repaired tire has lost its original durability and safety and can not continue to act as the main force. For safety reasons, the tire that has been repaired on the sidewall can only be used as spare tire. It is important to note that when the tire is repaired as a spare tire, the speed of the car must be strictly controlled (it is recommended to keep the speed within 80km/h) so as to ensure the safety of the vehicle. Conclusion: the tire side can be mended, but the premise is that there is no serious damage to the tire cord. Therefore, we should select qualified professional tire service shops for tire damage assessment and sidewall repair, so as to ensure the quality of repair. If the side of the tire is seriously damaged, we still need to change the tire decisively. In order to save money and ignore safety, it will be no gain.