[Basic knowledge of car]Note that car spare tires cannot be used for a long time

According toTiresAccording to the inspector, some car owners use the spare tire as a common tire for a long time, and the consequences are very serious.Under normal circumstances, the size of the spare tire is smaller than the size of the normal tire, and its flatness, tire width orTiresThe diameter of the tire is different from that of a normal tire. The purpose is to distinguish the spare tire from the normal tire, so as to remind and prompt the owner to replace the used spare tire with a normal tire as soon as possible. The brighter colors are meant to remind the car owner to replace the spare tire in time. 1. The spare tire should not be used for a long time. It is not used to replace the normal tire for a long time. It is used less frequently, so there is relatively less chance of friction with the ground. For example, after replacing the spare tire, due to the friction coefficient of the four tires Different, the ground adhesion is different, the air pressure is different, long-term use will affect the vehicleBrake system,Steering systemAnd the suspension system have a certain impact on the drivingSeat beltThere is a great hidden danger. At the same time, other tires in the same direction will have uneven friction. The spare tire is an emergency tire and should not be used for a long time. The spare tire runs on the car for a long time and is not subject to wear, so it is different from the common tire. In addition, if the spare tire is improperly lifted, it is unsafe. There are strict requirements for lifting tires in specialty stores. 2. Always check the air pressure of the spare tire, because if you do not pay attention, you will find that the air pressure of the spare tire is insufficient when the spare tire needs to be replaced, which will cause trouble. 3. The spare tire should be protected from oil corrosion. The spare tire is a rubber product, and it will age if stored for too long, so please check for damage or cracks before using it. The main component of tires is rubber, and rubber is most afraid of the erosion of various oils. After the tires are exposed to oil, they will quickly bulge, which will greatly reduce the service life of the tires, and they are often stored in the trunk. Try not to put the oil and the spare tire together. If the tire has been stained with oil, use a neutral detergent to wash off the oil in time. Tip: Before the tire pattern wears to the wear mark line, the tire should be replaced as soon as possible, and when the sidewall of the tire has small cracks, it is not possible to run long distances or high-speed driving in this situation. Because the sidewalls of the tires are very thin, punctures are prone to occur when driving at high speeds.In addition, due to the front tire punctureCarThe direction of the tire is more difficult to control. If there is a crack on the front tire sidewall, then it must be moved to the rear wheel or replaced. 4. To understand the tire model. These figures are very important to driving safety, especially the load index and tire speed. If any of these regulations are exceeded, it will bring hidden dangers to driving safety.For example, 185/70r13 86t tire, 185 represents the section width (mm), 70 represents the aspect ratio, r represents the radial structure, and 13 representsWheel hubFor the diameter, 86 represents the load number, and t represents the tire speed. 5. When replacing tires, tighten the bolts at the corners, so that the bolts will be evenly stressed and the tires will not swing when driving. When a vehicle uses a spare tire, pay attention to the speed, and it is best not to exceed 90 kilometers per hour. 6. The pressure of the spare tire is different from that of the main tire In order to ensure the shape and use of spare tires during storage, the air pressure selection is different from that of common tires. Generally, low-pressure tires are between 2.0 and 2.5, while spare tires are between 2.5 and 3.0. The air pressure of the spare tire is unqualified. Because the owner does not have a barometer, there is no way to adjust the air pressure? Therefore, after changing the spare tire, you should find a professional to adjust the air pressure before normal use. Generally, it is safe for the spare tire pressure to reach 2.7. 7. The spare tire cannot be used as a common tire. After the car has ran 100,000 kilometers, some car owners use the spare tire as a common tire and use the original tire as a spare tire. This is also impossible. Because the production time is different, the tire aging degree is also different, so it is very unsafe. 8. The repaired tires should be placed on the non-driving wheels. Some tires should be repaired after being punctured. The repaired tires must be placed on the non-driving wheels, because the driving wheels and non-driving wheels are not the same in heat, so the front wheels There are more flat tires and fewer rear tires, otherwise it will be very dangerous. How can I be anxious to change a spare tire Everyone felt very difficult to change the spare tire after the normal tire punctured, and they did not know how to change the tire; especially some female drivers were unable to do anything about it. Technicians generally believe that to change a car's tires, it is necessary to understand some conditions and master the correct method, generally according to the following procedures: 1. In most cars, the spare tire is fixed horizontally on the floor of the trunk. In some cars, the spare tire is fixed on the sidewall of the trunk upright. 2. UseJackHold the car up slightly and loosen the fastening nuts of the wheels before the tires are off the ground.But sometimes the nut is too tight, rusted or other reasons, so that it is difficult to remove it with all the strength, even due to excessive force.SpannerDamaged. Here is a trick to teach you. Dip a rag or glove with a little flammable grease, put it on the hard-to-unscrew nut, and ignite it. When it is hot, use a wrench to gently pull the nut to unscrew the nut. Of course, this method can also be used for other nuts that are difficult to disassemble. However, this method is limited to emergency use, and pay attention to fire prevention. 3. After loosening the fastening nut, continue to support the car with a jack. After the tire is completely off the ground, remove the original tire. 4. Install the spare tire and fasten all the fastening nuts evenly according to the diagonal order. 5. Lower the jack and replace the tires. 　 Tip: Always remember to inflate the spare tire. Once the front tire bursts, it can be an emergency; in addition, after replacing the spare tire, you must repair the tire as soon as possible, remove the spare tire, and reinstall the repaired tire. Related: ·Do you know the 6S shop?
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