What Our Gearhead(R) Experts Are Saying: "This is hands-down the easiest way to add reliable power data to my Force AXS setup. Installation is clean, and the battery lasts forever. It's been totally dependable through weather and hard miles."Push your training further with the Force E1 Left Arm and Power Meter Spindle, designed to blend seamlessly into your existing Force AXS crankset. This spindle-based system accurately captures left-side power and doubles it for total watt output-providing the insights you need to ride smarter and stronger. Built on Quarq's proven power meter platform, it's waterproof, dependable across weather conditions, and powered by a long-lasting AAA lithium battery that keeps you riding for a full season before needing a change. The integrated design adds minimal weight and is optimized for use with SRAM's Road WIDE DUB bottom bracket systems.