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CHANGZHOU, China – Changzhou Yongmao Special Fastener Co., Ltd., a manufacturer specializing in cold-headed fasteners and precision components since 1993, has introduced its Hollow Thru-Axle YM12-AH-K for Bicycle – YONGMAO, a lightweight axle shaft engineered for road bikes, mountain bikes, and e-bike platforms. The product joins the company's established thru-axle lineup and addresses growing demand for bicycle components that combine weight savings with structural reliability.

The YM12-AH-K is manufactured from 7075 aluminum alloy and 6066 aluminum alloy, with additional options in 10B21 and 20CrMo alloy steel. The fully hollow, one-piece forged construction reduces unsprung mass while maintaining the stiffness required for disc-brake load transfer. The axle is available with anodized black or natural color finishing, and offers customizable lengths, thread pitches, and end-cap configurations to suit different frame and hub standards. As a cold-headed component, the axle benefits from continuous grain flow through the shank and head transition, a characteristic that supports fatigue resistance in cycling applications where repeated load cycles are routine.

The launch reflects broader growth in the bicycle thru-axle segment. The global bicycle thru-axle and skewer market was valued at USD 0.5 billion in 2024 and is projected to reach USD 1.2 billion by 2034, registering a compound annual growth rate of 8.5%. This expansion is driven by the increasing popularity of cycling as a recreational and fitness activity, rising demand for high-performance bicycles, and the continued shift from traditional quick-release skewers to thru-axle systems. Thru-axles offer a more rigid connection between the wheel and frame, reducing the risk of wheel slip under load and improving disc-brake alignment—advantages that have made them standard on modern mountain, gravel, and road disc-brake bikes.

From an engineering standpoint, hollow thru-axles present a specific manufacturing challenge. Unlike a solid machined axle, a hollow axle must maintain wall thickness consistency and straightness over long slender lengths, while the head and thread ends must withstand torque without deformation. Yongmao's cold heading process is well suited to this task, allowing the company to form the axle in a single piece rather than welding or machining separate sections. The YM12-AH-K benefits from this approach, delivering a component that balances weight, stiffness, and durability for demanding riding conditions.

Changzhou Yongmao Special Fastener Co., Ltd. holds ISO 9001 quality management system certification and was recognized as a National High-Tech Enterprise in 2023. The company operates multi-station cold heading lines, automatic thread rolling equipment, and an in-house laboratory equipped with universal testing machines, salt spray chambers, hardness testers, and torque testing instruments. Its product portfolio spans extra long bolts, slender screws, deep-hole drilled bolts, hollow stem bolts, e-bike axle shafts, and EV battery fasteners, serving automotive, motor, construction, and bicycle industries. The company also provides OEM and ODM services for custom cold-headed components made to drawing or sample.

The Hollow Thru-Axle YM12-AH-K is now available through Yongmao's distribution channels for bicycle brands, aftermarket suppliers, and e-bike manufacturers worldwide.

http://www.yonmach.com
Changzhou Yongmao Special Fastener Co.,Ltd.

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