4iiii Precision Shimano Dura-Ace 9000 Single Sided Power Meter
Whether you’re a pro or simply training hard, PRECISION Powermeters deliver industry-leading accuracy, highly dependable cadence data and 3D powermeter technology capable of measuring tri-axial strain on your crank arm. Designed to be durable and lightweight, compatible with ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.
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