Every road and mountain bike’s riding efficiency, stability and service life hinge entirely on its drivetrain. For bike brands building mid-to-high-end cycles, generic low-end crank and flywheel parts become a fatal bottleneck limiting product competitiveness.
As a professional two-wheeler drivetrain manufacturer, Shenzhen Jiankun Sports specializes in CNC-machined crankset, chainring and flywheel assemblies for road and mountain bikes. Our whole series adopts aerospace-grade high-tensile alloy raw materials and full CNC precision cutting, delivering three core advantages that mass-produced standard parts cannot match: ultra-smooth zero-jitter shifting, minimal power loss during pedaling, and outstanding anti-impact performance.
For road cyclists chasing high-speed cruising, our precisely matched chainring and flywheel combinations reduce friction loss during acceleration; for mountain bikers tackling bumpy off-road trails, the reinforced crank arm structure resists heavy impact and avoids deformation on rugged terrain.
All Jiankun drivetrain assemblies pass rigorous fatigue cycle and abrasion resistance lab tests before delivery. We support full customization: custom tooth counts, crank arm lengths, anodized surface finishes and logo engraving to fit entry, mid-range and professional-grade bike lines. With stable mass production capacity, strict QC procedures and cost-effective factory-direct pricing, we have become the long-term OEM partner for dozens of global bicycle brands. If you want to upgrade your bike’s core transmission performance, Jiankun’s crankset and flywheel series is your reliable one-stop solution.