Why spare tyres are smaller than regular tyres?

08/07/2019

If you have ever wondered why spare tyres are smaller than regular tyres, then you are at the right page for answers! check the reasons out in this article

When you buy a new vehicle or even the Tokunbo cars, you might notice that they come with small spare tyres. These tyres known as the 'donut' are usually also lighter than your regular tyres. You  might be wondering why they are smaller and have minimal weight. Even when you get those that are full-sized, they tend to still be slightly lighter too. This article is meant to address why spare tyres are smaller than regular tyres. Some of the reasons will surprise you.

1. The smaller they are, the more space you have in your trunk

Asides the Toyota RAV4 which has its spare tyre hanging on the door of the trunk (and maybe a few other SUVs), spare tyres usually are kept inside the trunk of the car. Some cars come with specially carved out space for the tyres. However, the boot isn't meant for just the tyre alone.

If the spare tyre is same size or even bigger, how will you get other cargo into your boot? On an average your boot is about 17 cubit feet, you won't want a tyre that takes about 1/5 of that volume. The donut spare tyres are more shallow, narrow and have less diameter than the regular ones. The width too is a lot less. So in the area where the tyre is kept, you can still keep your spanner, wrench, spare nuts and other tools while still maintaining enough room for any extra luggage in the boot.

tyre

The spare tyre should not run for over an hour

2. The smaller they are, the lighter the car is

You know how heavy your regular tyres are especially when you want to install them. Maybe that's even why you hardly carry them, you roll them instead so your back won't hurt. Now imagine all that weight on your car. Regular tyres are made to carry all the weight of your car for a very long time. Spare tyres on the other hand aren't meant to hold such weight for more than 50 miles.

Due to all of this, it is made to be lighter and not cause extra drag on the car. There's already enough weight from the engine and the occupants, you now add that of a regular tyre. Your car will not only go lower, but you will email up burning extra fuel just to ensure your vehicle maintains the acceleration you want for it. So instead of your fuel economy car to go on 25 miles per gallon, it goes on 18 miles per gallon - that is less fuel efficiency.

>>> More facts about spare tyres: 4 essential things you need to know about a spare tyre

3. The smaller they are, the less they are used

Spare tyres are made to be smaller, as a reminder that you should not drive on them for too long. As stated earlier, the average distance for you to drive your car with the spare tyre on is 50 miles. This means it should not be on the car for more than an hour. It is expected that you should be able to find a vulcaniser or a mechanic shop so you can get your flat one fixed and installed back.

Even if you can't find a tyre repairer, you should get a tyre seller after driving for an hour. Anything more than this stipulated time and distance, you'll have to get the tyre checked for wears, tears, air pressure and puncture.

spare-tyre-in-comparison-with-regular-tyre

The spare tyre is being produced to save more & more space

4. The smaller they are, the easier they can be fixed

You won't want to expend all the energy from the rice or akpu you have eaten on lifting a tyre out of your car trunk. Therefore, automakers and tyre manufacturers tend to make the spare tyre lighter and smaller. A flat tyre shouldn't be an issue that needs a professional to help you fix, or a multitude of people. Since it's a small tyre, you can remove the lug nuts, jack up the vehicle, fix the tyres and move on - with little or no hassle. In fact, some spare tyres are made specifically for some cars. So you can look at your car manual for more on the specs.

5. The smaller they are, the less they cost

Finally, to explain why spare tyres are smaller than the regular ones, it's important to note that they are also cheaper. The materials used in making them are lighter and therefore doesn't incur the same cost as the regular ones. From the rims to the rubber, you can notice the significant difference in weight as compared to regular ones.

Just to add, as at the time of writing this article, a brand new regular tyre goes for 16,000 naira while the compact spare tyre goes for 10,000 naira. However, this doesn't mean you should replace all your four wheels with spares. Kindly read through the reasons for why you shouldn't. You wouldn't want your car to lose traction by the way.

>>> Check out more on driving and car maintenance tips right here on Naijacarnews.com!

Kennedy Ilediagu
  • Jenny: While this might be fine for city drivers and people who live close to a larger town, for people who live 2, 4 or 6 hours away from a town with a business that sells and services tyres it is a real problem.

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