The SRM Wireless Professional Rotor 3D Compact (8 strain gauges) has an accuracy of ±2%. The Wireless PowerMeter has a 130/110BCD and a 24mm steel axle. It comes with standard chainrings 50/34 (NO-Q Rings) and includes the Rotor bottom bracket BB1.

Note: If you want to mount Q-Rings they need to have two different BCD - big ring 130mm BCD, small 110mm BCD!

Includes:

• SRM Wireless PowerMeter
• SRM PowerControl
• Heartrate belt
• Speed sensor
• Handlebar clip
• Software
• Manual
• Multi-charger (works with both 110V and 220V)
• USB download cable
• Rotor bottom bracket BB1 (96g)