What does HUB 19 9 5J mean

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 sedans, the wheel size is large, and the tire is flat ratio.

If it is high, it can have a good tension effect visually, and it will also increase the stability of the vehicle's handling, but then there is the 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. For the average car, the ET value.

For positive, on a few vehicles and some jeeps.

is negative. Center hole.

The center hole is the part that is used to be fixedly connected with the vehicle, that is, the center of the wheel hub and the concentric circle of the wheel hub.

The position of the diameter here affects whether we can secure the rim by installing the hub.

The geometric center can coincide with the geometric center of the hub.

The wheel hub 21 inches means that the hub width is inches. Hub width (J-value) refers to the distance between the flanges on both sides of the hub. The "high trace" in the new hub refers to inches, and the "J" represents the shape and height of the hub flange.

The width of the hub determines the width of the tires that can be mounted. The width of the wheel determines the width of the tires that can be installed, and the wheel hub can be equipped with tires of width.

Features of 21-inch wheelsFirst of all, it is good-looking, and Mo Nianshen makes the whole vehicle look very imposing, and gives consumers a strong sense of sport and fashion. In addition, the improvement of handling performance is also effective, especially when driving at high speeds, the grip is stronger. However, the fuel consumption of large wheels will be relatively large.

Flat ratio. The bigger the tyre, the better the comfort and the less noisy the tyre.

Wheels 15 . It means the diameter and width of the hub, respectively.

The types of tires are: the international standard tire code, and the bucket is simply expressed in millimeters to indicate the cross-sectional width and flat ratio.

percentages. Followed by: tire type code, rims.

Diameter (inches), load index (allowable load-bearing mass code), allowable speed code.

For example: 175 70r 14 77h in 175 represents the tire width is 175mm, 70 means that the flat ratio of the tire section is 70%, that is, the section height is 70% of the width, the rim diameter is 14 inches, the load index is 77, and the use of speed empty pants is H level.

Brief introduction. The displacement of the small car is in between, corresponding to its tire specifications.

It is applicable to the range of 155 65R13 73T--175 70 R 14 77H.

Compact car displacement between, the corresponding tire specifications are applicable to the range of 185 60R15 --205 40 R16, the displacement of medium-sized cars is between, the corresponding tire specifications are applicable to 205 55R16--255 35 R 18 in this range, the displacement of medium and large cars is between, the corresponding lead its, the tire specifications are applicable to 225 45R17 --265 30 R19, the displacement of large cars is between, and the tire specifications are corresponding to 255 40 R18-- 295 30R20.

18-inch means that the diameter of the wheel is 18 inches, which means that it can only fit 18-inch tires.

The 8j and 9j worth is the width of the hub. In other words, it is most suitable to install 225 width tires or 245 width tires for this wheel.

8 J and 9 J mainly refer to the width of the wheel, so although they are both 18 inches, the width of the tires is different.

Strictly speaking, the wheel is a combination of the hub, the wheel disc, and the rim, the wheel hub is set on the axle tube or steering knuckle by tapered ball bearings (the brake disc is installed on the wheel), the rim is used to install the tire, and the wheel disc is used to connect the hub and rim, and they are connected by tire screws.

And we usually call the combination of the wheel and the rim the wheel, commonly known as the car wheel, as shown in the picture above, we usually refer to the iron wheel rim and aluminum alloy rim refers to this part, there are many articles to call it the hub, in fact, it is wrong. So, in the following article I use the wheel to represent this part, not the hub.

First, the function of wheels and tires.

The functions of wheels and tires are: to support the whole vehicle; Mitigate impact from the road surface; generation of drive, braking and lateral forces; generate a positive moment; It plays a role in overcoming obstacles and improving passability.

Wheels and tires, also known as wheel assemblies, are mainly composed of two parts: wheels and tires.

Second, the rim. 1) Deep groove rims for sedans and light off-road vehicles;

2) Flat bottom rims for medium-sized trucks;

3) Split rims are used for medium and heavy-duty off-road vehicles.

3. Parameters and significance of wheels:

The main parameters of automobile wheels are: wheel size, PCD, offset ET, and center hole.

Wheel size: consists of two parameters: ring diameter and ring width.

It can be expressed in the following ways; 1565 and so on, there are no hard and fast rules on the format. Front"15"Represents the diameter of the ring, which represents the diameter of the wheel is 15 inches; Behind""(Or maybe it's the bead width, which means the wheel's bead width is inches.) Wheel sizes can usually be found on the engraving on the back of the wheel.

PCD: refers to the pitch diameter of the bolt hole of the hub. It is expressed as follows:"5"It indicates the number of bolt holes, which means that there are 5 bolt holes.

Indicates that the pitch diameter of the bolt hole is . Generally, the larger the model, the larger the pitch diameter will be. Small cars are generally 4x100.

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. The offset is used to adjust the wheel base and ensure that the wheels do not interfere with the car body.

There are positive offset, zero offset, and negative offset. This offset has a great impact on the vehicle, and it will change the vehicle's data such as the wheel base and kingpin ground distance, which will affect the vehicle's handling.

Center hole: It is the big hole in the middle of the hub, note that the size of the center hole is measured from the back to the correct data. Each car is different, such as the wheel rim axle hole is large, be sure to use the middle hole collar, otherwise the wheel will shake at high speed.

This he refers to the silhouette of the car, this and that, what India, and this size.

1. The role is different.

Rims, commonly known as rims, are installed and supported around the perimeter of the wheels.

The parts that support the tire, together with the spokes, form the wheel. Rims and spokes can be monolithic, permanently attached, or removable.

The hub is a barrel-shaped, center-mounted metal part of the tire that supports the tire in the inner rim of the tire. It is also called a rim, a steel rim, a wheel, and a tire bell. There are many types of hubs according to diameter, width, molding method, and material.

2. Different types.

The wheel hub is also called the rim. 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.

There are two main common forms of rims: deep groove rims and flat-bottomed rims; In addition, there are split rims, semi-deep groove rims, deep groove wide rims, flat bottom wide rims, and full inclined bottom rims.

It means that the width of the tires is not the same, the best size is also usable, and the best is also available.

The earliest tires were made of wood, as can be seen from the chariots of ancient China and the carriages of gentlemen abroad. Later, when the explorer Christopher Columbus reached the island of Haiti in the West Indies on his second exploration of the New World in 1493-1496, he was surprised to find rubber lumps that local children were playing with. Later, he brought this wonderful thing back to his homeland, and after a few years, rubber was widely used, and the wheels gradually changed from wooden to hard rubber.

But the rubber tires at this time were still solid, and they were uncomfortable to walk on, and they were also very noisy. The first man to buy an inflatable tyre was named Lorry, a nobleman, and the total price of four tyres was forty-four pounds and two shillings. In 1847, Science USA magazine introduced Thomson's pneumatic tires and called them epoch-making improvements.

However, at that time, Britain paid too much attention to traditional gentrification, and in order to protect horse-drawn carriages and limit the development of steam cars, the speed of automobiles was limited to 2 miles per hour in urban areas and 4 miles per hour in suburbs.

In this way, Thomson's invention had no market and was slowly forgotten. In other words, Thomson's first tire revolution did not bring the same light as the sun to mankind, because the darkness that human beings should experience does not seem to have come to an end.

But the sun always has to come out because it is needed by humans and everything, and more than 40 years later, in 1888, Mr. J. B. Dunlop, an Englishman who worked as a veterinarian in Ireland, patented an inflatable tire.

Wheel hub 18 8J, the former means that the wheel is 18 inches, and the collision needs to be used with 18-inch tires. The rear 8j refers to the width of the tire is 8 inches. 9j is nine inches.

You should use tires with a minimum width of 225 mm, preferably with a wide tire of 235 mm, and a maximum of 245 mm wide tires. In terms of production cost, widened tires and larger sizes are lower at the same time, so generally wide wheels and tires need relatively large sizes.

In fact, in the case of non-essential, it is not recommended that the owner modify the enlarged tires at will, in addition to improving the subjective driving experience, the improvement of the actual performance is mainly high-speed stability, daily use will only increase fuel consumption, and comfort will also decrease. And the wider tires do provide better steering support.

But that's also for extreme cornering, which is still not needed on a daily basis, and widened tires will also reduce the car's starting speed. If there is a need for high-speed stability and extreme cornering and the right environment, then replacing the wheels and tires is a good investment.

The things you need to pay attention to when buying a car are as follows:

1. Confirm the purchasing ability

Determine the purchasing ability, after buying a car does not affect the overall quality of life of the family, generally based on the average income of the family in the past three years, generally take out 20% of the family for three years, but not more than the fixed assets of the family.

10% of the value.

2. Concerns:

The most important thing for a family car is safety, followed by affordability, because the safety of the car carries the life of a family, so safety is the top priority.

3. On-site confirmation:

According to the above two steps, basically determine the several models to buy, and go to the 4S store in person.

On-site confirmation, including test drives, inquiries, loans, repairs and maintenance, etc.

J simply represents the shape and height of the hub flange.

The number represents the width of the hub, and J just represents the shape and height of the hub flange, in addition to J we also have C, JJ, JK, K, etc., mainly for the difference in the height of the bulge, C is the lowest, K is the highest, and J is the most common type of hub. This means that the width is inches.

The wheel is generally composed of three parts: the hub, the spokes and the rim. The hub is an important part that connects the brake drum, spokes, and half shaft, and is sometimes called the wheel core (i.e., the core of the wheel). The wheel hub is encased on the half-shaft sleeve or steering knuckle through the bearing, which transmits the power of the car from the transmission system to the spokes, the rim and finally to the tires to make the car drive.

is the aspect ratio of its position in the car. If the tyre is marked with a speed mark, it means that the maximum speed of the wheel cannot exceed 100 km/h.

The 17 in the wheel 17*8j refers to 17 inches, and the number 8j represents the width of the wheel, and the j only represents the shape and height of the hub flange.

The hub is the rotating part of the wheel core that is connected by the inner profile of the tire steel through the column, that is, the metal part that supports the center of the tire mounted on the shaft. Also known as the rim.

Rims, wheels, tire bells. According to the diameter, width, molding method, and different types of materials, the wheel hall has a variety of gears.

In the past, wheel bearings for passenger cars were mostly used in pairs with single row tapered rollers or ball bearings. With the development of technology, sedans have widely used sedan wheel hub units. The range of use and usage of the hub bearing unit is growing day by day, and it has developed to the third generation:

The first generation consisted of double-row angular contact bearings.

Compose. The second generation has a flange on the outer raceway to secure the bearing, which can be easily sleeved to the axle.

The upper is fixed with a nut. It makes it easy to repair the car. The third-generation hub bearing unit is a combination of the bearing unit and the anti-lock brake system.

The hub unit is designed to have an inner flange, the inner flange is bolted to the drive shaft, and the outer flange mounts the entire bearing together.