The size of the hub is actually the diameter of the hub. The 15-inch and 16-inch hubs that people often say are the size (diameter) of the hub. Generally on a car, a large wheel hub and a high tire flatness ratio can have a good visual effect of tension, and the stability of vehicle handling will also increase, but the fuel consumption will increase with it. Such additional problems.
The width of the wheel hub is also commonly known as the J value. The width of the wheel hub directly affects the choice of tires. For tires of the same size, with different J values, the aspect ratio and width of the selected tires are also different.
PCD and hole position
The professional name of PCD is pitch circle diameter, which refers to the diameter between the fixing bolts in the center of the hub. Generally, the large holes of the hub are 5 bolts and 4 bolts, but the distance of the bolts is also different, so we can often listen to it. To the name 4X103, 5X114.3, 5X112, taking 5X114.3 as an example, it means that the PCD of this wheel hub is 114.3mm, and the hole position is 5 bolts. When choosing a wheel hub, PCD is one of the most important parameters. For safety and stability considerations, it is best to choose a wheel hub with the same PCD as the original car for upgrading. Huiru Spinning Technology can tailor the wheels for your car models to suit your PCD.
Offset (also called offset or ET) is the distance between the mounting surface and the center line of the hub, and this parameter can usually be found on the back of the hub. In layman’s terms, it is whether the wheel is retracted inward or bulged outward after modification. For ordinary cars, the ET value is positive, for a few vehicles and some jeeps, it is negative.
The center hole is the part used to fix the connection with the vehicle, that is, the position of the hub center and the concentric circle of the hub. The diameter size here affects whether we can install the hub to ensure that the geometric center of the rim can be consistent with the geometric center of the hub (although the hub shifter The hole pitch can be changed, but this modification is risky, netizens need to try it carefully).