From the perspective of vehicle performance and driving experience, they can indeed have different effects. Usually, large wheels usually have a more domineering appearance, making the entire body appear more calm and powerful. At the same time, large wheels can also improve driving stability and reduce the tilt of the vehicle when turning, thereby enhancing handling and safety.

In addition, large wheels can also improve the load capacity and grip performance of the vehicle. When the tire size is larger, the flattening rate of the tire is relatively small, which means that the contact area between the tire and the road surface is larger and the friction force is greater. This is particularly important for high-speed driving and curve driving, because it will make the vehicle more stable and provide stronger support.

But it is worth noting that the big wheels are not perfect. Large wheels will affect the acceleration and braking performance of the vehicle, because the weight and resistance of the wheels will increase. And large wheels are usually noisier than small wheels, which means they produce more tire noise and affect ride comfort.

Therefore, when choosing the size of an automobile hub, it is necessary to balance the needs of various aspects and weigh different advantages and disadvantages. And according to the adaptability of the model, choose the appropriate size of the wheels to ensure the stability and comfort of the vehicle.

When it comes to wheels, the termssize,PCD,ET, andCB refer to important specifications that ensure proper fitment and performance on a vehicle. Here's a breakdown of each term:

1.Size of the Wheel

The size of a wheel typically refers to two key measurements:diameter andwidth.

Diameter: The overall diameter of the wheel, usually measured in inches. Common sizes include 15-inch, 16-inch, 17-inch, 18-inch, and so on. This measurement corresponds to the distance from one end of the wheel to the other, from edge to edge.

Width: The width of the wheel is also measured in inches and refers to the distance between the inside edges of the wheel's rim, where the tire sits. For example, you might see a wheel labeled as 18x8.5, which means the wheel has an 18-inch diameter and an 8.5-inch width.

Example: A wheel size of 18x8.5 means:

· 18 inches in diameter

· 8.5 inches in width

2.PCD (Pitch Circle Diameter)

· Definition: PCD refers to thediameter of the circle formed by the centers of the wheel’s bolt holes.

· Format: It's represented by two numbers: the number of bolt holes (studs) and the diameter of the circle (in mm). For example,5x114.3 means:

o 5 bolt holes

o 114.3 mm diameter of the circle passing through the center of the bolt holes.

Example:5x114.3 means:

· 5 bolt holes

· A bolt circle diameter of 114.3 mm

3.ET (Offset)

· Definition: ET, oroffset, is the distance from the wheel’s mounting face (the part that contacts the hub) to the wheel’s centerline.

· Types:

o Positive Offset (ET +): The mounting face is towards the front (towards the wheel's outer side), pushing the wheel inward.

o Negative Offset (ET -): The mounting face is towards the back, pushing the wheel outward.

o Zero Offset (ET 0): The mounting face is aligned with the centerline of the wheel.

Example:ET40 means:

· The mounting face is 40 mm towards the outside of the wheel centerline.

4.CB (Center Bore)

Definition: Thecenter bore is the diameter of the hole in the middle of the wheel, which fits over the hub of the vehicle. It’s crucial for the wheel to match the hub size to ensure the wheel is properly centered.

Common Sizes: Center bore sizes vary based on the vehicle make and model. For instance, common center bore sizes are56.1 mm,66.1 mm, or70.3 mm.

Example:CB 66.1 means:

· The center bore is 66.1 mm in diameter.