Every car owner who has had a puncture in their car should have noticed a phenomenon: most car spare tires are one size smaller than the normal tires，And most of them are brightly colored，Why is this？Dedicated spare tire is also called non-full-size spare tire，The biggest seabet appdifference between special spare tires and normal tires is that the tire specifications and sizes are smaller than normal tires。If one of the tires is punctured and the special spare tire is replaced, the vehicle can only drive at low speed。Then，Here comes the problem，Why don’t manufacturers make spare tires the same size as factory tires？

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1.Reduce costs。The material of this spare tire is cheap，Manufacturers can also save money。You must know that if you replace a non-full-size spare tire, the price including the entire wheel hub will only be around a few hundred yuan，Much cheaper than a full-size spare tire。

2.Small size，Small space occupied。Because of the small size，Tire thickness is relatively thin，Barely takes up little space in the trunk。

3.Relatively light weight，Easy to install。The non-full-size spare tire is small，Light weight，Compared with the full-size spare tire, it is much easier to put in and out，It won’t be so laborious during installation。But the whole process of changing the spare tire is still very troublesome。

4.What’s more important，It will remind the car owner，Don’t use the spare tire as a regular tire，Replace normal tires as soon as possible。

Can a full-size spare tire be used as a normal tire?

There are also some cars on the market equipped with full-size spare tires，Many friends will ask that，Can a full-size spare tire be used as a normal tire？

The answer is:Cannot。

Same size does not mean that all other parameters are exactly the same，Such as tire speed rating、Load Index、Tire patterns, etc.。Also，The original wheel hubs are mostly made of aluminum alloy，The spare tire hub is mostly made of steel，This will increase the weight of the spare tire、Heat dissipation、Wind motion, etc. are inconsistent with the other three standard tires，Long term use，It will lead to uneven force and deviation；Furthermore, the four tires have different degrees of wear，This will also cause the car to drive unbalanced，Long-term use may cause safety hazards。

So the spare tire is the spare tire，The spare tire is only used as a temporary tire to cope with emergencies。Regardless of whether the spare tire is full size or not，It is only recommended for temporary use，And pay attention to the speed limit。(The content of the article comes from the Internet, if there is any copyright involved, please contact us to delete it)