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 reliable, durable and lightweight, compatible with ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.
PRECISION Ride Ready comes installed on a new Shimano left crank arm (105, Ultegra, Dura-Ace, Deore XT or XTR). These crank arms will fit bottom brackets using the Hollowtech II interface.
Choose the Shimano left crank arm you want at checkout, and you’ll receive it with PRECISION installed. The crankset can be installed easily with the use of a Shimano crank installation tool, hex bits and a torque wrench. Install the 4iiii app, pair, update, calibrate and ride.