Hollow Thru-Axle YM12-J-K Lightweight – YONGMAO

The Hollow Thru‑Axle YM12‑J‑K (Lightweight Version) is a precision‑engineered bicycle axle produced by Changzhou Yongmao Special Fastener Co., Ltd. under our brand YONGMAO. This model features a hollow core design that reduces unsprung mass while maintaining the rigidity needed for secure wheel mounting. As a dedicated Bicycle Thru‑axle solution, the YM12‑J‑K is well‑suited for performance‑oriented bicycles where every gram counts, without compromising clamping force or axle stiffness.

Our manufacturing process leverages advanced cold forming technology to achieve consistent dimensional accuracy. We apply the Cold Heading Process to produce axle blanks with superior surface finish and uniform grain flow, which is critical for threaded and shoulder sections. In‑house deep‑hole drilling and concentricity testing ensure each axle meets tight geometric tolerances, verified by projection meters and hardness testers in our laboratory.

We recognise that bicycle frame designs vary across brands and standards. Therefore, we offer flexible adaptation through our Custom Non‑standard Fasteners service – the YM12‑J‑K platform can be adjusted in overall length, thread pitch, head style, flange configuration, and drive type to match your specific drawings. Surface treatments such as anodising or anti‑corrosion coatings are also available upon request. Our engineering team collaborates closely with customers to translate concepts into production‑ready solutions, from prototypes to high‑volume orders.

Quality assurance is embedded in every stage of production. As an ISO9001 Certified Manufacturer, we maintain documented procedures for raw material incoming inspection, in‑process monitoring, and final release. Each batch is tested for dimensional conformity, hardness, and torque resistance using our universal testing machines and thread gauges, ensuring consistent performance across deliveries.

While the YM12‑J‑K is specifically tailored for bicycle applications, our expertise extends to other industries as well. However, this lightweight hollow axle remains our focused offering for cycling enthusiasts and manufacturers seeking a reliable, customisable wheel retention component. Partner with YONGMAO for competitive lead times, flexible order quantities, and dedicated technical support from initial enquiry to final delivery.

Specification Comparison of Various Bicycle Through Axles