Custom Precision Metal Parts for Bicycle Internal Gear Systems

Dongguan Chenyuan Trading Co., Ltd., backed by our self-owned manufacturing plant Fengyu Precision Electronics (Dongguan) Co., Ltd., specializes in custom precision metal components for bicycle internal gear systems. Founded in Taiwan in 1971 and established large-scale production in Dongguan in 1995, our factory boasts over 50 years of professional experience in precision metal fabrication.

Different from ordinary hardware manufacturers that only process parts according to drawings, we provide early-stage R&D collaborative support. We have established in-depth strategic cooperation with China’s leading developer of bicycle internal gear systems, participating in joint development from project initiation instead of passive production. Our professional engineering team assists clients in multi-round raw material screening and surface finishing optimization. We complete rigorous tests on hardness, yield strength, salt spray resistance and fatigue performance to fully meet the strict durability standards of bicycle internal gear modules.

Our components feature excellent wear resistance and fatigue resistance. They resist plastic deformation and jamming under repeated pedaling impact. With superior flatness, stable tensile strength, yield strength, fatigue life and torque resistance.

We provide one-stop mass production of full-range core machined metal parts for bicycle internal transmission systems:

These core hardware components determine the shifting stability, load-bearing capacity and service life of internal gear hubs. Unlike suppliers offering single products only, we support the full process including prototype development, material trial verification, in-house mold design and mass delivery. All parts are produced with unified tolerance and processing standards, eliminating matching errors from multiple suppliers and greatly reducing customers’ procurement and quality control costs.

Our independent quality laboratory is equipped with high-end inspection instruments, including Mitutoyo CNC coordinate measuring machines, roundness testers, optical projectors, hardness testers and XRF analyzers. All tests (dimensional precision, mechanical properties, salt spray corrosion resistance) are completed in-house to ensure accuracy and stability of every batch.

We hold ISO9001, ISO14001 and IATF16949 certifications, adopting automotive-grade quality standards far exceeding ordinary bicycle accessory industry norms. Standardized production and inspection procedures eliminate quality fluctuations, reduce supply chain risks and ensure high consistency in mass production.

We support the entire project lifecycle, from prototype validation and material trial runs for new internal transmission R&D to stable mass production of custom precision parts. Our professional team provides one-on-one technical docking services.

We can provide complete material certificates, performance test reports, salt spray test documents and dimensional inspection reports to support customers’ product certification and market promotion. Feel free to contact us with your drawings, material requirements and performance specifications for customized cooperation.