We trust only the best to provide accurate information regarding data, so we recommend adding the ROTOR 2INpower SL Dual Sided Road 2x Power Meter Crankset to your road setup. With 2INpower SL dual measurement technology, the right and left legs are measured independently to provide us with data accurate to /- 1. 5%, showing us power, cadence, balance, torque effectiveness, pedal smoothness, and more right to our connected ANT or Bluetooth device.