SRM's time-tested powermeter is matched to Rotor's ultra-stiff triple-hollow 3D+ crankset for precise power measurement and power transfer on every ride. And, Rotor's Q-Rings let you dial-in your pedaling for maximum output. 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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