I believe many friends don't know much about spare tires before and after buying a car. What are the characteristics of these three emergency measures? What are the advantages and disadvantages? How to use it? Today, Yang Zai will talk to you for your reference.
Full-size spare tire
Full-size spare tire, as its name implies, refers to the spare tire with the same size pattern as the standard tire of the vehicle. Usually the same rims are provided.
Advantages:
1. Theoretically, it can be used as the standard tire with the best emergency effect.
2. The cruising range and weight are closest to the standard tires.
limitations on use
1, large
Moreover, it takes up a lot of space, and it is usually installed under the floor of the luggage compartment, which will take up considerable storage space when designing. There are also plug-ins, but they are easily stolen.
2, heavy
The full-size spare tire is relatively heavy, and it will increase a lot of self-weight and fuel consumption when it is installed in the car every day, which is very wasteful.
The most important thing is that it is difficult to replace heavier tires. If a little fairy with little strength encounters tire damage while driving, changing the tire is a disaster.
3. Full-size spare tire ≠ standard tire
The biggest misunderstanding of some people is that the full-size spare tire is regarded as an "extra tire", but it is still a spare tire and cannot be used as a standard tire. Spare tires are not commonly used, and the degree of pattern wear is very different from that of standard tires, just like wearing old and new shoes on two feet will be awkward, and long-term use will cause damage to suspension and transmission shaft. In addition, there is an important common sense that is often overlooked, that is, as long as the tire is removed, it must be dynamically balanced. So strictly speaking, a full-size spare tire can only be used as an emergency spare tire.
Non-full-size spare tire
Non-full-size spare tire means that the specification is smaller than the standard tire, occupying much less space, and the weight is generally only 2/3 of the standard tire.
Advantages:
1, small
The non-full-size spare tire is narrower, which can make more luggage compartment space and hold more luggage.
2. Cheap
The price is only full-size 1/3 or even lower.
2. Light
Small is natural and light. Generally, the non-full size is lighter than the full size 1/3 or more, and it is easier to replace. It has a positive impact on fuel consumption, but it is subtle. After all, it is only about 10 kg lighter.
limitations on use
1, the speed is not higher than 80 km/h.
This is understandable. After all, it is just a spare tire for emergency use. Wearing shoes of different sizes on two feet is definitely uncomfortable, and using them lightly will definitely cause damage to the chassis and transmission shaft.
2, mileage limit, change as soon as possible.
Similarly, the chassis will be damaged after a long time. The best situation is to change back to the standard tire within 100 km, but if the distance is long, it is necessary to further slow down and change the position of the spare tire every once in a while.
3. It is best used on non-driving wheels.
The non-full-size spare tire has a small load and cannot provide the same grip as the standard tire, so it can't be used on the driving wheel and steering wheel, otherwise it will easily run off.
Similarities between two kinds of spare tires
The spare tire is not left there, but also needs maintenance.
1, check the tire pressure regularly.
If the replacement spare tire is deflated, it will not play a sufficient role. Be sure to check it regularly.
Step 2 avoid corrosion
Many friends like to put lubricating oil, glass water and some sundries in the luggage compartment If they are not tightened, they may flow out and penetrate into the spare tire compartment. People who have wading experience should also clear the accumulated water in the spare tire warehouse as soon as possible and dry the spare tire. Liquid is corrosive to rubber. If it is not cleaned for a long time, it will lead to the aging of some areas of the spare tire, and there are safety hazards when using it.
3, regular replacement
No matter what size it is, even if it is never used, the spare tire must be scrapped after leaving the factory for 6 years. The safety hazard of tire aging is very big.
Even with a more affordable and cheaper full-size spare tire, some consumers are still not satisfied. After all, they still have to change the tires themselves. Is there no solution without a spare tire?
Yes!
Continuous driving with zero tire pressure (explosion-proof tire)
Continuous running with zero tire pressure means that the tires can run for a certain distance, generally at least 80 kilometers, to ensure that the vehicle can reach the maintenance point smoothly. This is not electronic technology, but actually the effect of using explosion-proof tires. It should be noted that a flat tire is not really "explosion-proof", but should be called "flat tire". The support structure is added in the tire wall to ensure that the tire can still play a certain supporting role when deflated by physical means.
superiority
1, tire replacement is not required.
The biggest advantage of an explosion-proof tire is that you don't have to bother to change the spare tire, because there is no spare tire at all. This is the gospel of many fairies. Just drive directly to the nearest repair shop for tea.
Step 2 make more room
Without a spare tire, there is no need to design a spare tire compartment, and the luggage compartment has more space and frees up considerable space.
3, the probability of puncture is greatly reduced
It should be noted that passenger car puncture is not a real puncture used by military vehicles, but because the unique structure of puncture will be stronger, so the probability of large-scale "explosion" will be very low.
limitations on use
1 and driving below 80km/h? 80 kilometers
After all, the tire is broken, so run slowly. It's usually not too serious. It can support driving for 80km, which is enough for ordinary cities.
2. Need to cooperate with tire pressure monitoring.
This is the most easily overlooked, because in the process of air leakage or even when it is completely deflated, it is very likely that there is no obvious sign of tire puncture, which leads to the owner's failure to find the problem in time. Therefore, it is necessary to have real-time tire pressure monitoring to remind car owners to maintain in time.
3. Poor comfort
Explosion-proof tires are thicker and harder because of more structures and the use of special rims, so the shock absorption effect is reduced and the comfort will be worse under the same conditions.
4, the price is high
Explosion-proof tires are obviously higher in technology and cost, and the price is generally about half as expensive as ordinary tires. Most of them are used in luxury cars.
The tire is flat, so I can't change it if I want to.
Seeing so many benefits of a flat tire, many people want to replace their cars with flat tires, which is a misunderstanding. It is said that explosion-proof tires are mostly used in luxury cars, not only because they are expensive, but because they need to be used, not only special wheels, but also special design and adjustment of the chassis.
We should know that the heavy explosion-proof tires will increase the unsprung weight of the vehicle, and the tire wall is hard, so it is necessary to make special adjustments to the chassis, otherwise it will not only affect the comfort, but also accelerate the wear of suspension components such as wear shock absorbers. Chassis adjustment is a relatively expensive project, and generally low-end cars have no cost budget. So in the configuration table, it is not just a "flat tire". If you want to use a flat tire, you need a complete "zero tire pressure continuation" system.
5, the repair technology is high.
Due to the special structure and hard sidewall of explosion-proof tire, it is difficult to remove it from the rim. Improper operation will cause irreversible damage to the tire and seriously affect the tire life.
Summary: Having said that, it seems that zero tire pressure is the best? No, the choice of these three tire repair schemes depends on the use environment.
The full-size spare tire seems to be the most wasteful and laborious, but it is the most reliable and durable. Therefore, it is common sense to bring at least two full-size tires in remote areas with few maintenance outlets or cross-country driving in harsh environments. There's no place to have it repaired in that place.
Non-full-size spare tire is the most affordable choice in towns with many repair shops. It's cheaper, smaller and easier to replace. If something goes wrong, you can go directly to the nearby repair shop for repair.
Zero tire pressure continuation seems to be the most convenient and worry-free solution, but after all, the purchase cost is too high, and I am afraid it is not affordable for civilian cars in recent years. And maintenance is not convenient, in some small counties, I'm afraid not every repair shop can repair it. It is a very good choice to use it in cities.
Therefore, it is correct to choose what suits you.
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This article comes from car home, the author of the car manufacturer, and does not represent car home's position.