Can the spare tire be used as a regular tire?

As one of the most important parts of the car, the tire is in direct contact with the ground, and together with the car suspension, it can relieve the impact of the car when driving, so as to ensure a good ride and ride comfort, the spare tire of the car is used for emergency replacement after the tire fails; however, when it comes to the use period of the spare tire, I believe that many car owners are not very clear. Can it be used for a long time?

First of all, as for how long it can be used, in fact, there are clear instructions in the maintenance manual of many models. Generally speaking, it is four years, that is to say, even if you have not used it once, put it in the trunk for four years, the spare tire needs to be replaced; although the spare tire is not worn, but it belongs to the rubber products, and it will be aging after a long time.

Tire rubber aging, intermolecular cohesion will be worse, tensile strength will naturally become worse; although the spare tire front with steel wire, spare tire side with a cord fabric layer can play a reinforcing role, but the strength of the spare tire will still be greatly reduced in the normal driving on a flat road in the probability of failure is very small, but if the spare tire is driven in the pothole or gravel road, it is very easy to be impacted and puncture, like a rubber band in our lives! The new rubber band has a strong stretching ability and high elasticity, but after a few years of being placed there, it will randomly break. The same is true of tires, aging badly, a little external force is easy to burst.

In practice, however, many family cars are used for commuting and driving in urban areas; even the old spare tire from 1978 is used infrequently and does not crack enough to warrant changing it. This is because the probability of using a spare tire for driving in urban areas is very low; even if a spare tire is used, a repair shop can usually be found within a few kilometers. In addition, many cars now have tire pressure monitoring, even if the tire is flat, it can be found in time and repaired in time; of course, if you often run long distances or go on road trips, it is safer to replace the spare tire according to the normal life of the spare tire.

Generally speaking, whether to change the spare tire depends on the vehicle environment; it should be noted that if the spare tire has been used for one day, the speed must not be too fast. If you can find a repair shop, be sure to have the tire repaired in a timely manner; do not use the spare tire as the original tire.

Since the spare tire has not been used, the unworn tire is different from the worn tire, which can easily cause the car to run out of alignment; and the spare tire is different from the original tire in terms of production, its aging, hardening degree, service life, deformation and so on are not the same.

In short, the spare tire can be used as a temporary emergency tire, and should never be used as a regular tire, otherwise not only the driving experience is not good, there is a great possibility of accidents, very dangerous.