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What are the parameters in the wheel hub model size chart?

1 Answers

JacksonLynn

07/29/25 2:05pm

The main parameters of automobile wheel hubs include: 1. Wheel hub size: Composed of two parameters, the rim diameter and rim width. The representation can be 15*6.5; 15*6.5JJ; 15*6.5J, etc., with no strict requirements on the format. The "15" at the front indicates the rim diameter, meaning the diameter of the wheel hub rim is 15 inches, and the "6.5" (or 6.5J, 6.5JJ) at the back indicates the rim width, representing the wheel hub rim width of 6.5 inches. 2. PCD: Refers to the pitch circle diameter of the wheel hub bolt holes. The representation is like 5*114.3, 10*100/114.3, where "5" indicates the number of bolt holes, meaning there are 5 bolt holes. "114.3" indicates that the pitch circle diameter of the bolt holes is 114.3mm. 3. Offset: This is the distance between the mounting surface and the centerline of the wheel hub, usually found on the back of the wheel hub. The offset is used to adjust the wheel track and ensure that the wheels do not interfere with the vehicle body. 4. Center bore: This is the large hole in the middle of the wheel hub. Note that the center bore size is correctly measured from the back. If the wheel hub's axle hole is large, a center bore ring must be used; otherwise, the wheel will shake at high speeds. Modified wheel hubs are generally designed with a larger center bore to fit all vehicles, while the original vehicle's center bore is usually smaller. If there is a gap, a hub-centric ring should be added.

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