Bike Hub

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The bike hub is the core component of a bicycle wheel, located at the center of the wheel and connected to the rim through spokes to form an integrated structure. Its shell is typically made of steel alloy or aluminum alloy, and an internal bearing system is used to reduce rotational friction. The rear hub integrates a freehub body for mounting the cassette and enabling ratchet-driven power transmission. Modern hubs adopt a modular design and include standardized interfaces—such as six-bolt mounts and center-lock rings—to accommodate disc brake systems.
Based on transmission principles, hubs can be classified into single-speed hubs, derailleur hubs, and internal gear hubs. Among them, derailleur hubs adjust rotational speed by changing gear engagement. Patent technologies indicate that hub assemblies use an internal spline engagement structure to transmit driving force, with surface angle parameters controlled within a range of 0°–60° to achieve optimal transmission efficiency. During maintenance, specialized tools are required for freehub removal and bearing replacement.

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Ningbo Shenglu Bicycle Co., Ltd.
Manufacturing Bicycle Components, Built on Process Control
Ningbo Shenglu Bicycle Co., Ltd. is located in Ningbo City, Zhejiang Province, China. Founded in 1998, our company covers an area of 80,000 square meters. We have always adhered to the corporate culture of "People-oriented, Unity and Progress" and the business philosophy of "providing customers with high-quality products and competitive prices".
After more than 20 years of development, we have grown into a professional manufacturing enterprise with a complete production chain and supporting facilities. Our annual production capacity reaches 15 million pairs of steel hubs and 5 million pieces of freewheels. "SHUNFENG", the core brand of Ningbo Shenglu Bicycle Co., Ltd., has gained a good reputation in the industry.
While providing customers with high-quality services, we also attach great importance to improving our manufacturing capacity. We have a complete in-house production chain, including punching, aluminum forging, CNC machining, cold forging, blackening and phosphating, aluminum oxidation, CP and ED plating, heat treatment, and assembly.

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