What is the reason why tires are always flat?

I believe many car owners will encounter this situation: the tires were inflated only a few days ago, and then they became flat in a few days. The problem of this kind of tire running flat slowly is really worrying. After all, it is not a bicycle, and it is really time-consuming and laborious to inflate it at intervals. Tire is one of the important components to ensure driving safety. If there is a problem, the owner will not be safe to drive. Here, talk about how to self-check the hidden leakage of tires so as to replace them in time!

1. The tire side and inner edge are damaged

Some car owners have a poor sense of position, and often let the tire side rub against the curb, which will wear the tire side over time. The damage of the inner edge of the tire is caused by the wrong operation when assembling and disassembling the tire to the hub, which basically occurs in the process of replacing the tire with a new one or installing the tire after repairing the tire. Damage to the side and inner edge of the tire will cause hidden leakage of the tire, and there will be a high risk of puncture.

inspection method: the damage degree of the tire side can be directly observed, and cracking and bulging will occur in severe cases. As long as this situation is found, it is necessary to replace the tire with a new one as soon as possible to avoid the accident of puncture. Whether the inner edge of the tire is damaged or not can only be checked after the tire is disassembled, so the owner should carefully supervise the operation mode of the repairman when disassembling the tire in the repair shop.

2. The foreign body is stuck in the tire

It is the most common damage of the tire. Foreign objects that are easy to penetrate into tires include nails, screws, iron wires, glass fragments, sharp stones, tiles, etc. Among these foreign objects, nails and screws are the most likely to puncture the tire, causing the tire to leak, and they will also be inserted in the damaged part of the tire. If they are not cleaned in time, the damage degree of the damaged part of the tire may be aggravated.

inspection method: the tire sticks to a foreign body, and we can find it by carefully observing the tire surface. If the place where the foreign body is stuck is hidden, we can also sprinkle water on the tire surface to find the place where bubbles come out, and sometimes we can even hear the "hissing" deflated sound.

3. The hub flange is deformed

After the automobile tire is filled with gas, the outer edge of the tire will be closely attached to the hub flange to prevent the gas in the tire from leaking. If the hub flange is deformed by collision, it will affect its tightness with the outer edge of the tire, resulting in hidden leakage of the tire.

inspection method: if the hub flange is seriously deformed, we can find it with naked eyes; If the flange deformation of the hub is not obvious, it is necessary to remove the wheel first, and then sprinkle water on the joint between the tire and the hub, and the place where bubbles are generated is the place where the hub deformation causes hidden leakage.

4. The wheel hub is broken

It is rare that the wheel hub is broken. When the wheel hub is broken, the gas inside the vacuum tire will leak from the crack, and small cracks will also become the hidden danger of the wheel hub fracture. It can be said that although this situation is rare, it is extremely dangerous.

inspection method: it is necessary to remove the wheel, and then check whether there are cracks on the surface and inner wall of the wheel hub. If the wheel hub is unfortunately cracked, don't expect to repair it. It is safe to replace the wheel hub quickly.

5. The tire valve is damaged

If no abnormality is found on the tire, then we can turn our attention to the valve. Family cars are basically equipped with vacuum tires, and the valve is installed on the wheel hub, and its material is mostly rubber. After being used for a period of time, the rubber valve will slowly age, its texture will gradually harden and eventually crack and leak under the attack of sun, rain and air pressure in the fetus.

inspection method: check the valve. Besides checking whether there are cracks on its surface, you can also touch the rubber of the valve by hand to feel its softness. Since the rubber valve is easy to age and crack, the owner may wish to try to replace the metal valve. Although the money for a metal valve can buy several rubber valves, a more durable metal valve will make people feel more at ease and worry-free.