SRM's time-tested powermeter is matched to Rotor's stiff triple-hollow 3D crankset for precise power measurement on every ride. The Rotor 3D is compatible with BB90 and traditional bottom bracket styles. Accurate to +/- 1.5%, the SRM Power System includes the PowerControl 7 computer, speed & cadence sensor and heart rate strap for real-time data during your ride that you can download later for a thorough post-ride analysis.
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