Bigger is not necessarily better, a "big wheel hub" with both beauty and risk.

The ancients said, "Clothes make the man, and gold depends on the Buddha." This sentence is the same for cars. In order to make the car look better, in addition to changing the color of the car body, large-size wheels can be said to be an essential factor. However, just like beautiful clothes are not necessarily comfortable to wear, although the wheel hub belongs to the appearance component, in fact, beauty and "risk" coexist. Today, the staff will tell you about the winding in the "big hub".

Just like buying clothes depends on the size table, before talking about the wheel hub, the staff will tell you the size of the wheel hub: R and flatness.

R stands for Radial, which means radial tire. The number after R indicates that the diameter of the hub directly determines the size of the tire.

Flatness refers to the percentage of tire cross-sectional height to its maximum cross-sectional width, which is simply the height-width ratio of tire. When changing cars into "shoes", we all like to choose tires with small flatness, because the smaller the flatness, the stronger the visual impact, the thinner the tire, the higher the hardness of the tire wall, the higher the pressure the tire can bear, the stronger the lateral resistance when turning, and the stronger the handling of the vehicle, but the poor vibration reduction ability. Conversely, the greater the flattening ratio, the smaller the visual impact and the thicker the tire. However, due to the long sidewall, low sidewall hardness, strong cushioning ability and high comfort, but the road feel is poor and the lateral resistance is weak when turning.

Knowing the most basic "size", let's talk about the "beauty and danger" of big wheels.

Advantage 1: enhance aesthetic feeling

There is no doubt that the big wheel hub looks more imposing and fashionable. The big wheel hub makes people feel full of movement and feel that the car can ride into the dust all the time.

Advantage 2: Improved handling performance.

On the premise of constant tire diameter, a large hub means that the flat rate of the tire must be small, and the corresponding tire width will be wider. Of course, it will also make the vehicle more stable and have stronger grip when driving at high speed, and at the same time, the roll of the vehicle will be smaller when turning. Therefore, the large wheel hub is not only more beautiful, but also makes the vehicle more maneuverable.

This is why many super sports cars use large-size wheels and low-flat sports tires to improve the handling of the whole car.

Disadvantages 1: Impacting acceleration and braking performance.

You may be surprised to hear this shortcoming for the first time. Does the large hub actually affect acceleration and braking? The influence is inevitable, but it is on the premise of not modifying the power system and brake system. Only refitting the large-size wheel hub means that the wheel hub mass increases, the tire width increases, and of course the contact area between the tire and the ground also increases. Accordingly, the increase of friction means that more power is needed to push the vehicle forward, which affects the acceleration performance.

At the same time, replacing the large-size wheel hub with the same material as the original factory will undoubtedly increase the unsprung weight, make the feedback of the suspension system to the road conditions dull, increase the moment of inertia, increase the pressure of the braking system, and require a longer braking distance to stop the vehicle.

Therefore, if you plan to replace the large-size wheel hub, it also means that you need to modify the power system and braking system with stronger performance to match it. Of course, you can also choose to install large-size lightweight wheels to make up for the increase in weight, but it also means higher modification costs. Even if the lightweight and large-size hub is replaced at a high price, it is necessary to consider whether the output shaft can withstand such a strong torque and whether the gear of the axle can withstand such a large stress.

Disadvantage 2: the ride comfort is reduced.

When introducing the "size" of the tire, it is known that the outer diameter of the tire is a constant value, that is, the larger the rim, the smaller the thickness of the tire. Therefore, the big wheel hub must be matched with tires with low flattening rate, and the thinner tire thickness has poor filtering effect on road bumps and slight vibrations. If you want to be beautiful, one of the costs is that the vibration reduction performance is greatly weakened and the "road feeling" is more obvious.

Disadvantage 3: Increased fuel consumption?

Most big wheels also mean wider tires to some extent. Within the range of tires allowed by the vehicle, the wider tires have stronger grip, but the resistance will also increase, and the fuel consumption will certainly increase.

Disadvantage 4: Will the use cost increase?

If nothing else, the price of beauty must be to spend more money. How many things can only be done at cost, and it makes no difference where they are put.

Just like the tire in the above picture, take golf Lv Jia as an example. 19' s 280TSI automatic watch model is 225/45? R 17 tire, low 1.6L? 205/55 was adopted by automatic innocence type? R 16 tire. We choose the same brand, and the price difference between the two tires is almost double, which is only the price of 17 inch tire, and the price of replacing a larger tire is even higher.

Disadvantage 5: refitting the wheel hub will affect the annual review and transfer.

According to the current relevant laws and regulations, the owner of a licensed motor vehicle must apply to the vehicle management office for registration of change if he changes the body color, model, performance, purpose and structure, or replaces the frame, body or engine. In principle, it is not allowed to install the tail wing, modify the large enclosure and exhaust pipe, and replace the original wheels and tires with different sizes and specifications.

The appearance of large-size rims is inevitably different from the appearance of vehicles when they are registered, which directly affects the annual inspection, transfer and even insurance claims of vehicles. Moreover, most users not only modify the big wheel hub, but also involve the modification of other parts such as the power system, which also does not comply with the laws and regulations that limit the line.

Write at the end:

As the saying goes, the most suitable is the best. In fact, automobile manufacturers will consider these issues when developing vehicles. The parameters of the original wheel are well matched with the vehicle to seek the balance between economy, aesthetics and comfort. Performance cars or sports cars use more large-size wheels for performance services. In order to install a larger brake disc to improve the braking ability, get better grip and clearer road feeling, because the performance car does not pursue ride comfort.

Many users choose to replace the big wheel hub just to make the vehicle look better, without considering whether it is legal or not and its impact on vehicle performance. However, now all major automobile manufacturers are aware of this, and the wheels equipped for vehicles will be as beautiful as possible to meet the needs of users from the source.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.