What s that one that goes around the top of a car s wheel?

Tile rings in order to press the edge of the tire.

Size. The size of the hub is actually the diameter of the hub, and the 15-inch wheels and 16-inch wheels that people often say are the size (diameter) of the wheel. Generally in cars, if the wheel size is large and the tire flat ratio is high, it can have a good tension effect visually, and the stability of the vehicle handling will also increase, but then there is an additional problem of increased fuel consumption.

Width. The width of the wheel hub is also commonly known as the J value, the width of the wheel directly affects the choice of tires, the same size of tires, the J value is different, the choice of tire flat ratio and width is different.

PCD and hole bits.

The professional name of PCD is called pitch circle diameter, which refers to the diameter between the fixing bolts of the hub, most of the holes in the general hub are 5 bolts and 4 bolts, and the distance between the bolts is also different, so we can often hear the name of 4x103, 5x112, for example, it means that the PCD of this hub is 5 bolts in the hole. PCD is one of the most important parameters when choosing a wheel, for the sake of safety and stability, it is best to choose a wheel that is consistent with the original car for upgrading.

Offset. Offset (also known as offset or ET) is the distance between the mounting surface and the centerline of the hub, and is usually found on the back of the hub. In layman's terms, it is whether the wheel hub is indented or protruding outward after modification.

The ET value is positive for cars in general and negative for a few vehicles and some jeeps.

Center hole. The center hole is the part that is used to fix the connection with the vehicle, that is, the position of the center of the wheel hub and the concentric circle of the wheel hub, and the diameter size here affects whether we can install the wheel hub to ensure that the geometric center of the wheel rim can coincide with the geometric center of the wheel hub.

"Hub" refers to the cylindrical center part of the wheel.

The wheel hub of the car refers to the hard moment of inertia used to carry the car and the tire.

can also be called a rim.

steel rings, etc. The complete hub unit, including the car bearings, i.e. the flanges.

Cooperate with the tires to support the wheels. The main role is to affect the size of the brake specifications, as well as the tire specifications.

The larger the wheel, the wider the wheel, the higher the performance of the widened tires.

Introduction

Early automobiles did not have car wheels, but used simple two-bearing units, using tires close to solid, solid tires in terms of performance, and driving comfort, etc., were extremely poor in all aspects. The result is a combination of the wheel hub and the tire, which is responsible for the direct contact with the ground and the soft pressure of the car's driving inertia, and then the strong wheel hub bears the hard inertia pressure.

In fact, the biggest impact on the braking performance of the car is the tire, a tire with better performance can make the car 100 kilometers per hour, the distance from braking to stationary is reduced by a few meters, for example, from the original braking distance of 39 meters, it is normal to reduce it to less than 35 meters. Larger wheels and larger braking systems are used to brake cars with greater braking inertia, such as large SUVs with high weight, or Ferrari sports cars with a limit speed of more than 300 km/h.

The automobile wheel rim is decorative, and the aluminum wheel hub has the following characteristics compared with the iron wheel

1. Beautiful and generous; Lighter than Tie Xiangqi wheels, reducing the weight of the vehicle; Large ventilation area and faster heat dissipation; It is 2-3 times more expensive than steel drums. The strength is smaller than that of the steel wheel, the impact resistance is worse than that of the steel wheel, and the relative steel wheel is easy to change and combine;

2. Speak with data: the tensile strength of steel wheels can reach 600MPa, while the tensile strength of aluminum alloy wheels does not exceed 300MPa.

3. In addition, the aluminum wheel is easy to break when it collides at high speed, while the steel wheel is only deformed;

4. Finally, Germany uses more steel wheels, the purpose is safety; The United States mostly uses electroplated aluminum alloy wheels for safety. Chinese users love beauty just like American users, so they use aluminum alloy wheels more.

The hub of the car is the part where the axle is installed in the center of the wheel, which means that the tire is mounted on the hub. What people call rims or steel rims in everyday life refers to the wheels.

According to the characteristics of different models and vehicles and the needs of consumers, the surface treatment process of the wheel hub will also take different ways, which can generally be divided into two types: baking paint and electroplating.

In terms of material, it can be divided into steel wheels and aluminum alloy wheels. The manufacturing process of steel wheels is simple, the cost is relatively low, and the ability to resist the fatigue of metal beaters is very strong, very strong and durable, but the appearance of steel wheels is very ugly, its own weight is also very large, the inertia resistance is also large, the heat dissipation is relatively poor, and it is easy to rust.

The aluminum alloy wheel is relatively light in weight, small in inertia resistance, high in production accuracy, and small in deformation at high speed, which is conducive to improving the straight-line driving performance of the car, reducing the rolling resistance of the tire, and saving fuel consumption for the car. The thermal conductivity of aluminum alloy wheels is three times that of steel wheels, and the heat dissipation is very good. It plays a very good role in the thermal attenuation of the vehicle's braking system.

The center of the wheel of the car is installed in the center of the wheel at the part of the front spike axle, that is to say, the tire is installed on the wheel. What people call rims or steel rims in everyday life refers to the wheels.

The hub is a barrel-shaped metal part with the inner rim of the tire supporting the tire, and the center is mounted on the axle. It is also called wheel rim, steel rim, wheel wheel, tire bell. The rim refers to the inner part of the railway wheel profile. The profile of the wheel consists of a tread and rim.

In general, the rim is in contact with the outer rail of the curve only when the curve passes. In mountainous areas with many curves and small radii, the problem of premature wear of the wheel rim and outer rail is often prone to occur, and measures need to be taken to reduce the wear. For example, abrasive tread wheels, rim lubricators, transverse connections between bogies and radial bogies are used.

<> "Nowadays, cars have become a necessity for people's lives, and now the number of cars in China is also very large, so naturally we must have a certain understanding of some knowledge in automobiles. For example, what is the name of the ring inside the car tire?

The ring inside the car tire is called the wheel, which can also be called the rim, steel rim, etc. The complete hub unit, including the car bearings, i.e. flanges, work with the tires to support the wheels; The main role is to affect the size of the brake specification, as well as the choice of tire specifications, the larger the wheel hub can be put down, the larger the brake system, the wider the wheel hub can be used, the higher the performance of the widened tire.

Early automobiles did not have car wheels, but used simple two-bearing units, using tires that were close to solid, and solid tires were extremely poor in all aspects, such as performance, performance, and driving comfort. The wheel hub and the tire cooperate with each other, and the tire is responsible for directly contacting the ground and bearing the soft pressure of the car's driving habitual wear, and then the strong wheel hub bears the hard inertia pressure.

1.Materials are divided into:1.

Aluminum alloy material. 2.Iron and steel materials.

3.Magnesium alloy material. 4.

Carbon fiber composites. The wheel hub used in motor vehicles is a very important part of the motor vehicle, and it is the part that connects the tires of the motor vehicle. Once the wheel hub is damaged, the vehicle cannot be driven.

2.A car hub is an attachment to which a vehicle's tires are mounted, located on the central axle of the wheel. Car wheels can also be called steel rims or rims.

The size of the wheels is set according to the model. If you want to change the size of the wheel hub in the later stage of use, you need to go to the relevant Tsai Chun Li department to go through the filing procedures, and you can't modify it privately.

1. The wheel hub is also called the rim.

2. According to the characteristics and needs of different models, the surface treatment process of the wheel hub will also take different ways, which can be roughly divided into two types: baking paint and electroplating.

3. The wheel hub of the ordinary model is less considered in appearance, good heat dissipation is a basic requirement, and the process is basically treated with baking paint, that is, spraying first and then electric baking, the cost is more economical and the color is beautiful, and the maintenance time is long, even if the vehicle posture is scrapped, the color of the wheel is still unchanged.

4. The surface treatment process of many Volkswagen models is baking paint. Some of the fashion-forward, sporty coloured wheels are also lacquered. This type of wheel is moderate and has complete specifications. Mite.

5. Electroplating wheels are divided into electroplating silver plating, water plating and pure electroplating. Although the color of electroplating silver and hydroplating wheels is bright and vivid, the retention time is short, so it is relatively cheap and liked by many young people who pursue freshness, and the market is between 300 yuan and 500 yuan.

6. Pure electroplating wheels, the color and luster are maintained for a long time, which can be said to be of high quality and high price. Medium and high-end cars mostly use pure electroplated wheels, about 800-900 yuan.

The function of the automobile wheel hub is: the part of the axle is installed to support the tires, and the external impact is cushioned, so as to realize the contact between the tires and the road surface and ensure the driving performance of the vehicle.