What is the wheel bolt pattern?
3 Answers
Wheel bolt pattern is 5×100. The wheel hub of a motor vehicle is a very important part that connects the vehicle, tires, and body. If there is an issue with the wheel hub, the motor vehicle cannot operate, posing a safety hazard during driving. Normal modifications to the wheel hub, such as changing the style or color, are allowed, but altering the size is not permitted. Relevant details about the wheel hub are as follows: Introduction 1: The wheel hub is a cylindrical metal component that supports the tire from the inside, mounted centrally on the axle. It is also known as the rim, steel rim, or wheel disc. There are various types based on diameter, width, manufacturing method, and material. Introduction 2: Depending on the characteristics and requirements of different vehicle models, the surface treatment process of the wheel hub may vary, generally divided into painting and plating. For ordinary vehicles, the appearance of the wheel hub is less of a consideration, with good heat dissipation being a basic requirement. The process typically involves painting, i.e., spraying followed by baking, which is cost-effective, provides vibrant colors, and ensures long-lasting durability. Even when the vehicle is scrapped, the color of the wheel hub remains unchanged.
The wheel hub bolt pattern, commonly referred to as the PCD (Pitch Circle Diameter), is the diameter of the circle formed by the centers of the wheel's bolt holes. For example, many cars are labeled with 5×114.3, indicating a 5-bolt hub where the circle diameter formed by the bolt holes is 114.3 mm. This specification is crucial! If you get the bolt pattern wrong when replacing wheels, the new wheels simply won't fit, and forcing them on can cause severe vibration while driving. Measuring it isn't difficult—last time I changed wheels, I just counted the number of bolt holes and used a tape measure to find the straight-line distance between the centers of diagonal holes, then converted it to get the PCD. Each car model has a different bolt pattern; Japanese cars often use 114.3, while German cars commonly use 120. It's best to check the factory specifications before replacing tires.
Simply put, the wheel bolt pattern refers to the size of the circle formed by the fixing screw holes. For example, if my car is marked with 4×100, it means that the four screw holes are distributed on a circumference with a diameter of 100 millimeters. This parameter is crucial when changing wheels. Last time, my friend bought wheels online without paying attention to the bolt pattern, and only realized they didn't match when they arrived. To measure, you can count the number of screw holes, measure the center distance between two adjacent holes, and then apply a formula to calculate. Nowadays, many modification shops have bolt pattern measuring tools, resembling a small fork-like device that can give a reading when inserted into the holes. When changing wheels, besides the bolt pattern, you also need to pay attention to the center bore size and the ET value, as these will affect the installation outcome.
