First, the spare tire definition and use
1. Definition: most vehicles will have a spare tire, but also most of the standard vehicle. Spare tire is usually stored in the trunk below, vehicle floor or outside the rear of the car, very conspicuous.
2. Categories of spare tires: There are two types of spare tires: full-size and non-full-size spare tires.
3. The use of spare tires.
Full-size spare tire: the specification size is the same as the original tire. This type of tire is more compatible, driving feeling and the original tire, but also can only be used in an emergency. However, it can only be used in an emergency, and because of its large size, it takes up space, weighs a lot, and increases gas mileage.
Non-full-size spare tire: the specification size is smaller than the original tire. It can only be used in emergency, and cannot be used as a normal tire. Although the size is small, but short distance use, will not cause any harm. Tee small, low weight, more space-saving and fuel saving. At present, most vehicles use these tires.

Second, the spare tire inspection and maintenance
1. Form the habit of checking the 4 tires being used before getting into the car, and also form the habit of checking the spare tire on a regular basis.
2. Every time the use of tire maintenance and maintenance of spare tires, check the spare tire tread depth, whether there are cracks, bulging, tire pressure discomfort and so on.
3. The tire pressure of the spare tire should be 0.2par higher than the normal tire pressure.
4. When traveling long distances, it is recommended to check the use of tires and spare tires, and carry good tools.

Third, spare tire precautions
1. Spare tire will be aging and damage even if not used for a long time, especially which is not wrapped with external tires, spare tire problems should also be checked by a mechanic and replaced.
2. Avoid oil stains, corrosive items in contact with the spare tire, causing damage to the spare tire, the trunk should be cleaned up daily, there is no need for things do not put in the trunk, increase fuel consumption at the same time may also corrode to the spare tire.
Spare tire is a spare tire, can only be used for a short time in emergency. There is no opportunity to turn the use of the spare tire, after replacing the spare tire must find a repair store in time to change the normal tire, do not use for a long time.

