A wheel hub includes many parameters, and each parameter will affect the use of the vehicle, so before refitting and maintaining the wheel hub, first confirm these parameters.
size
The hub size is actually the diameter of the hub. Bai and Du inch refer to the size of the hub. Generally, in the car, if the hub size is large and the tire flat ratio is high, it can play a very good visual tension effect, and it will also increase in the stability of vehicle control, but the following is the additional problem of increased fuel consumption.
width
The width of wheel hub is also known as J value. The width of wheel hub directly affects the selection of tires. For tires of the same size, the flat ratio and width of selected tires are different with different J values.
PCD and hole location
The professional name of PCD is pitch circle diameter, which refers to the diameter between the fixing bolts in the center of the wheel hub. Generally, most of the holes in the wheel hub are bolts and bolts, but the distances of the bolts are different. Take xzhi. For example, it represents the diameter of this wheel hub PCDdao.mm , hole location bolt. When choosing the hub, PCD is one of the most important parameters. For the sake of safety and stability, it is better to choose the same hub of PCD and the original vehicle for upgrading.
Offset
English is offset, commonly known as et value. The distance between the bolt fixing surface of the hub and the geometric center line is simply the difference between the screw fixing base in the middle of the hub and the center point of the whole wheel rim. For example, the offset value of a car is, if the hub of ET is replaced, it will shrink into the wheel arch more visually than the original hub.
The ET value not only affects the visual changes, but also relates to the steering characteristics and wheel alignment angle of the vehicle. The excessive offset value may cause the tire to wear abnormally, the bearing is easy to wear, and even can not be installed normally at all. In most cases, the same type of wheel hub of the same brand will provide different et values to choose from. Before refitting, comprehensive consideration should be given to it The most safe situation is to keep the ET value of the modified hub the same as that of the original factory without refitting the brake system.
Central hole
The central hole is the part used to connect the vehicle fixedly, that is, the position of the hub center and the concentric circle of the hub. The diameter and size here affect whether we can ensure that the geometric center of the wheel rim can match the geometric center of the hub when we install the hub.
