SPIRIT Crank Arm / G2

• The SPIRIT Crank G2 takes performance to the next level with a refined approach to design and function. Retaining modular customization and 9 crank arm length options.
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• It is now reinforced with a larger bolt size for enhanced stiffness and durability. Also equipped with an SCM440 spindle for superior strength and long-term reliability.
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• With a sleeker, more aerodynamic shape, the G2 delivers smoother pedaling dynamics and improved efficiency. Its optimized Q-factor, with 150mm, provides greater comfort and a more effective pedaling motion, ensuring every ride feels more confident and precise.
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• ✔9 Size Options: 140/145/150/155/160/165/167.5/170/172.5 mm, adaptable to various fitting theories and cycling needs.
• ✔Modular Approach: Supports the development of more crankset components and chainrings, allowing compatibility with different bike types.
• ✔Tailored Experience: Ensures a personalized cycling experience that can be easily optimized.
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Precision CNC Machining with AL-7075-T6 Alloy

Every SPIRIT crank arm is precision-crafted from a solid block of premium AL-7075-T6, an aerospace-grade aluminum alloy renowned for its exceptional strength and fatigue resistance.

We utilize a meticulous, time-intensive Full CNC (Computer Numerical Control) machining process. Unlike forged alternatives, this method allows for more complex shapes and tighter tolerances, resulting in a crank arm that is both lightweight and incredibly strong. While some carbon fiber products may present long-term durability concerns, our AL-7075-T6 construction offers a proven balance of stiffness, performance, and rock-solid reliability, ensuring that every watt of your power is transferred directly to the road.

Selecting the right crank arm length is crucial for comfort, efficiency, and injury prevention. While a professional bike fitting is always the best approach, you can use your height as an excellent starting point.

Our industry-leading range of shorter cranks (140mm-155mm) is specifically designed to benefit cyclists who require higher cadence, such as triathletes, or female cyclists and riders with shorter inseams looking for a perfect, ergonomic fit.