Reimagining the Landscape of Two-Wheeler Drive Components with Magnesium–Lithium Alloys

Major Strategic Partnership Announced: Jiankun Sports Teams Up with Professor Wu’s Team at Beihang University to Redefine the Landscape of Two-Wheeler Drive Components Using Magnesium–Lithium Alloys.

Lightweighting has become a clear growth driver for the global two-wheeler industry. From the constraints imposed by new national standards to the rising demand for premium riding experiences, core drivetrain components such as chainrings, cranks, and freewheels are at a pivotal juncture of material innovation. Shenzhen Jiankun Sports has positioned itself in the ultra-lightweight new‑materials segment, partnering with the Yuanhang Research Institute led by Professor Wu Guoqing of Beihang University to formally establish a strategic collaboration on custom magnesium‑lithium alloy cranks. This move enables the company to pioneer an end-to-end industrial chain—spanning cutting‑edge materials R&D to mass production of precision components—thus seizing the golden opportunity in the emerging field of advanced materials for two‑wheel mobility.

I. The lightweighting trend is sweeping the two-wheeler industry, with magnesium–lithium alloys emerging as the next-generation core material choice.

With the implementation of the new national standard, policies imposing weight and plastic‑usage limits on complete electric two‑wheel vehicles have officially taken effect: plastic components may account for no more than 5.5% of the vehicle’s total mass. Traditional steel and aluminum materials, constrained by their own weight, can no longer simultaneously meet the three critical demands of lightweight design, extended range, and responsive handling. Industry consensus holds that reducing a vehicle’s weight by 10% can boost the range of an e‑bike by 6%–8%; likewise, cutting 1 kg from unsprung components translates into an equivalent 10‑kg reduction in overall vehicle weight, directly enhancing hill‑climbing performance and cornering dynamics.

Following copper (8.9 g/cm³), iron (7.8 g/cm³), and aluminum alloys (2.7 g/cm³), magnesium–lithium alloys, as the fourth-generation lightweight metallic structural material, boast an ultra‑low density of 1.35–1.55 g/cm³, making them a revolutionary alternative for two‑wheel drive components. Their core performance comprehensively outstrips that of conventional aluminum, steel, and standard magnesium alloys:

Ultimate weight reduction, reduced riding fatigue: Compared to aluminum alloy, the same‑spec crankset and chainring weigh 40% less; compared to steel, they’re 75% lighter; and compared to conventional magnesium alloy, they’re 20% lighter—significantly lowering leg‑power input and markedly cutting energy expenditure on mountain off‑road rides and long-distance cycling.

Outstanding shock absorption and noise reduction, with an optimized drivetrain feel: its damping coefficient is more than ten times that of standard aluminum alloy, efficiently absorbing road-induced vibrations, minimizing resonant rattling in the crankset and cassette, and enhancing both smoothness of power transfer and overall vehicle durability.

High thermal conductivity plus robust electromagnetic shielding make it ideal for e‑bike applications: its superior heat dissipation efficiently removes the heat generated by the e‑bike drive system, helping to slow down the aging of bearings and gears; meanwhile, its excellent electromagnetic shielding protects the electronic control components from EMI‑induced malfunctions.

Green and recyclable, aligning with the global low-carbon trend: produced using low‑carbon or zero‑carbon processes, with finished products infinitely recyclable and reusable, meeting the requirements of global ESG supply chains and carbon tariffs, and helping vehicle brands enhance product premium.

High elongation and easy machinability, with versatile shaping: Its ultra‑high elongation accommodates complex crank‑shaped surfaces and intricately hollowed structures, enabling precision forging that transcends the limitations of conventional aluminum alloy forming while balancing lightweight design with structural strength.

Looking at the global market, by 2026, the domestic two-wheeler market—covering mountain bikes, road bikes, e‑bikes, and children’s bicycles—will exceed RMB 165 billion. Demand for lightweight components is surging, and magnesium–lithium alloys are rapidly transitioning from niche aerospace and defense materials to mainstream applications in consumer sports equipment. Over the next three to five years, these alloys are expected to become standard materials for high-end bicycles and electric-assist drive systems.

II. Exclusive Interview with Professor Wu Guoqing of Beihang University: Twenty Years of Dedicated Research on Magnesium–Lithium Alloys, Breaking Foreign Monopolies and Achieving Domestic Mass Production

The technological core of this strategic partnership stems from the Yuanhang Ultra-Light Materials R&D team, led by Professor Wu Guoqing of Beijing University of Aeronautics and Astronautics.

Professor Wu Guoqing has devoted decades to the field of ultralight metallic materials and is a leading figure in the industrialization of magnesium–lithium alloys in China.

Technological Breakthrough: In 2002, the company pioneered rare-earth‑reinforced magnesium–lithium alloy technology, shattering the long-standing technological monopoly held by Europe and the United States. It successfully addressed critical industry challenges—namely, the alloys’ susceptibility to corrosion and insufficient strength—thereby establishing a foundational proprietary formulation system for domestically produced magnesium–lithium alloys.

Industrial Implementation: In 2019, he spearheaded the establishment of Shandong Yuanhang Ultra-Light Materials Research Institute Co., Ltd., successfully commissioning China’s first 400‑kg‑class large‑scale magnesium–lithium alloy smelting production line. This enabled stable annual production of 300 tons of high‑strength, high‑toughness magnesium–lithium alloy, marking a transition from laboratory‑scale technology to industrial-scale deployment.

End-to-end value-chain integration: We have seamlessly connected the entire process—from lithium extraction from salt lakes to alloy smelting, composite processing, and surface treatment—while independently developing core technologies such as YAl₂ particle reinforcement and composite ball-milling modification. Our portfolio includes mature magnesium–lithium alloys under multiple grades, including LA141, LZ91, and LA91. These products are now in mass production, supplying satellite housings, drone structural components, and individual‑soldier military accessories, and have undergone rigorous validation under demanding aerospace operating conditions.

Cross‑industry implementation in the two‑wheel sector: Leveraging aerospace‑grade materials technology to expand into civilian applications, Guangdong Yuanhang Limei has pioneered the development of a 6‑kg‑class all‑magnesium‑lithium alloy concept bicycle, validating the feasibility of lightweighting for frames and drivetrain components, and officially embarking on the path toward industrializing magnesium‑lithium alloy two‑wheel vehicles.

Professor Wu stated: “In the early years, magnesium–lithium alloys were confined primarily to aerospace and defense applications due to high metallurgical barriers and persistently elevated costs. Following our team’s years of process refinement and the establishment of large-scale production lines, we have achieved independent, controllable sourcing by leveraging domestic salt‑lake lithium–magnesium resources, driving down unit production costs. Moving forward, sports equipment and two‑wheel vehicles represent the next trillion‑yuan‑scale application domains for magnesium–lithium alloys. Jiankun’s more than decade‑long expertise in precision manufacturing of drive components precisely addresses the manufacturing gaps that have long hindered the mass‑production rollout of new materials. Strong collaboration among industry, academia, and research institutions is an inevitable path for industrial upgrading.”

III. Jiankun and Yuanhang Limei Officially Sign! Anchoring on magnesium‑lithium crankshafts, they are building new barriers in the drive‑component sector.

Recently, Guangdong Yuanhang Limei Technology Co., Ltd. (a wholly owned subsidiary of Shandong Yuanhang Ultra-Light) and Shenzhen Jiankun Sports Equipment Co., Ltd. officially signed a strategic cooperation agreement for the custom production of magnesium‑lithium alloy cranksets. Simultaneous collaboration with leading industry players on hub and wheel rim development marks the establishment of China’s first closed-loop supply chain for core drivetrain components in magnesium‑lithium alloy two‑wheel vehicles.

Jiankun’s Forward-Looking Strategy: A Visionary Commitment to the Ultra-Light New Materials Sector, Building Three Core Competitive Advantages

As a leading domestic manufacturer of two-wheeled vehicle drive systems, Jiankun has long been dedicated to the R&D and production of cranksets, cranks, freewheels, and belt‑drive systems across all categories, including mountain bikes, road bikes, children’s bikes, e‑bikes, and electric‑assist bicycles. The company is a core supplier to numerous top-tier bicycle brands, both at home and abroad.
 

This foray into magnesium–lithium alloys is by no means accidental; it reflects the company’s forward-looking strategic positioning with a long-term perspective.

R&D Strengths: Proactively positioned in new materials R&D, with substantial investment dedicated to targeted research and development efforts.

As early as the nascent stage of lightweighting in the industry, Jiankun foresaw the development trend of ultra-light alloys and proactively allocated manpower, equipment, and R&D funding to establish a new‑materials laboratory. The company conducted long‑term material‑testing programs on magnesium‑lithium alloy forging, machining, and surface‑corrosion‑protection treatments, overcoming key technical challenges such as crank‑shaft forming, strength matching, and wear‑resistance modification. It has mastered the entire process—from product design and mold opening to forging, precision machining, and…
End-to-end in-house R&D capabilities for finished-product inspection enable rapid transition from small-batch prototyping to large-scale mass production.

Industrial-chain synergy advantages: upstream integration with leading material suppliers, downstream alignment with complete-vehicle resources.

Upstream, we have secured exclusive access to the core materials technology of Professor Wu’s Yuanhang team at Beihang University, granting priority access to mature, mass‑production‑ready magnesium–lithium alloy substrates, aerospace‑grade modification processes, and significant cost advantages. Downstream, leveraging Jiankun’s more than a decade of deep expertise in global automotive OEM client relationships—spanning leading domestic e‑bike brands and premium sports‑bike manufacturers in Europe and North America—we ensure seamless end‑to‑end integration of new‑material components, from R&D through to final market deployment.

Product Category Advantages: Comprehensive coverage of all component categories, with vast potential for industrial implementation.

Jiankun’s product lineup covers all‑scenario, two‑wheel‑drive components. In addition to the magnesium‑lithium cranksets that are being launched this time, the company will gradually introduce magnesium‑lithium chainrings, flywheels, bottom brackets, pulleys, and a full range of children’s bike cranks—spanning high‑end road bikes and professional mountain bikes all the way to consumer‑grade e‑bikes, lightweight folding bikes, and children’s bicycles. Its applications extend far beyond those of a typical component supplier.

Milestone in Collaboration: From Aerospace Materials to Cycling Accessories, Accelerating the Commercialization of New Materials

This signing focuses on the custom development of magnesium–lithium alloy crankshafts, leveraging Yuanhang’s aerospace‑grade material formulation and Jiankun’s precision manufacturing processes:

Performance upgrade: Compared with aluminum‑alloy cranksets, this model is 35%–42% lighter, with tensile and fatigue strength that meet the rigorous standards of professional racing. Shock absorption has been improved severalfold, addressing the traditional crankset’s drawbacks of bulkiness and foot vibration during riding.

Cost Optimization: Through large-scale mass production and the use of domestically sourced, proprietary raw materials, we are gradually reducing the end‑user price of magnesium‑lithium components, thereby disrupting the market landscape in which high‑end lightweight parts have been dominated by carbon fiber and imported titanium alloys.

Ecological Ecosystem Development: By partnering with leading manufacturers in the flower‑drum and bicycle‑rim sectors, we have established a closed-loop supply chain for core magnesium‑ and lithium‑based components. Moving forward, we will jointly develop industry group standards for magnesium‑ and lithium‑based bicycle components, helping domestically produced lightweight parts gain traction in the global market.

IV. Future Outlook: New Materials Empower Two-Wheeler Upgrades, with Jiankun Leading the Way in a New Era of Lightweight Design

Driven by the triple dividends of policy, consumer demand, and technological advancement, the era of industrial-scale production for magnesium–lithium alloy components in two-wheeled vehicles has arrived.

Going forward, Jiankun will collaborate with Yuanhang Limei and Professor Wu Guoqing’s research team to:

Phased product rollout: In the first phase, mass‑production delivery of magnesium‑lithium alloy cranksets for mountain and road bikes will be completed; in the second phase, a full range of magnesium‑lithium‑based drive components for e‑bikes and children’s bicycles will be launched; in the third phase, we will collaborate with vehicle manufacturers to develop fully magnesium‑lithium‑based, lightweight production models.

Continuous process iteration: Leveraging Yuanhang’s fourth-generation melting technology and the YAl₂ strengthening and modification process, we are steadily enhancing product strength and corrosion resistance, while expanding the application of magnesium–lithium alloys to new categories such as belt‑drive systems and motor housings.

Enhancing Global Footprint: Leveraging Jiankun’s existing domestic and international sales channels, we will introduce domestically produced aerospace‑grade magnesium‑lithium lightweight components to the global cycling markets of Europe, North America, and Southeast Asia, establishing a benchmark brand for China‑made lightweight parts.

From cutting-edge weight‑reduction technologies in aerospace vehicles to the bicycle cranksets beneath everyday riders’ feet, magnesium–lithium alloys are sparking a materials revolution in two‑wheel mobility. Riding the wave of new‑material innovation, Jiankun Sports leverages forward‑looking vision, robust manufacturing expertise, and world‑class R&D resources to lock onto the ultra‑lightweight “golden track,” continuously harnessing advanced materials to drive the global cycling industry’s upgrade.