How big is the difference between 18 inch wheels and 20 inch wheels?

    At present, each model of car companies will launch different configurations, the purpose is to attract a wider range of people, careful people will find that low-profile cars use small aluminum alloy wheels, such as 18 inches, and high-profile cars, often Will use larger aluminum alloy wheels, such as 20 inches. From this point of view, the large aluminum alloy wheels seem to be better. Isn't that true? How big is the difference between 18 inch wheels and 20 inch aluminum alloy wheels? The auto mechanic said bluntly: the greater the comfort, the lower.

1. Size difference

The size of the aluminum alloy wheel is the diameter of the outermost ring of the aluminum alloy wheel. One inch is equal to 2.54 cm, so 18 inches is equal to 45.72 cm, and 20 inches is equal to 50.8 cm, which is a difference of 5 cm. Said that this difference does not have much impact, but for large aluminum alloy wheels, the impact is quite obvious, and 18-inch and 20-inch aluminum alloy wheels are already larger aluminum alloy wheels.

2. Cost and price

There are many ways to produce aluminum alloy wheels for automobiles, but most of the current automobiles use aluminum alloy wheels of 18 inches and below. Therefore, under the effect of output, the price of a single aluminum alloy wheel is naturally reduced. The production volume of inch aluminum alloy wheels is less, so the cost is higher and the price is higher. For example, for an 18-inch aluminum alloy wheel, if the unit price is 700 yuan, then the same type of 20-inch aluminum alloy wheel may cost as much as 2,000 yuan. Therefore, the higher the car, the larger the aluminum alloy wheels are also very impressive.

3. Comfort

Luxury cars have no absolute relationship with driving comfort. The same is true for aluminum alloy wheels. The larger the aluminum alloy wheel, the thinner the sidewall and the larger the contact surface. Therefore, when driving on the road, the real situation of the road is Can reflect on the body, comfort will also decline.

4. Fuel consumption

The larger the aluminum alloy wheel hub will also lead to higher fuel consumption, because the large aluminum alloy wheel requires the width of the tire to increase, and the sidewall becomes thinner, which causes the contact area between the tire and the ground to increase, and the friction force increases, so the fuel consumption naturally increases. Taller.

5. Security and stability

Of course, large aluminum alloy wheels also have advantages. There are aluminum alloy wheels on the car, which are more atmospheric and attractive in appearance, and can attract more attention. Moreover, the large aluminum alloy wheels mean that the flatness ratio will be smaller, so the car will be safer to drive. , The stability should also be stronger. Simply put, the car's handling ability will be better under special circumstances, such as cornering, flat tires, wet road driving, etc., and the surface will be better.

Whether a car needs high-quality large aluminum alloy wheels or not depends entirely on its own needs. Compared with small aluminum alloy wheels, large aluminum alloy wheels have both outstanding advantages and obvious disadvantages. The bigger is not the better. However, any aluminum alloy wheels are actually inseparable from good maintenance, which is certain.

Aluminum alloy wheels, like tires, are actually in direct contact with the external environment. They may encounter scratches, squeezing, etc., resulting in damage to the aluminum alloy wheels. If the aluminum alloy wheels are broken or deformed, they must be replaced in time. , But if it is scratched, it may cause rust. At this time, the cost of repairing will be very high, because the paint or electroplating on the aluminum alloy wheel is similar to the car paint, and the cost of complete repair is also very high. , Sometimes it is better to buy a new one, in addition, you can also use self-painting for simple treatment.

Now most of the aluminum alloy wheels are mainly painted and not electroplated, so self-painting can also be used for treatment. Protect the aluminum alloy wheels and isolate the tire surface, and then use self-painting to align the aluminum alloy The wheel hub is sprayed so that it evenly covers the entire aluminum alloy wheels, which can protect the scratching position and avoid the problem of rust in the future.

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