Stages Cycling Dura Ace 9000

The 2016 Stages Cycling Dura Ace 9000 is a power meter. Seamlessly integrated, the meter adds less than 20 grams to the overall crankset, providing a wealth of data wirelessly via ANT+ or Bluetooth. Stages is a devoted manufacturer, specializing in only power meters, taking advantage of its history in indoor cycling to provide a meter that works perfectly out in the world. Information is precise, with a margin of less than two percent.
The meter works standard with 11-speed drivetrains, but can be paired with the CN-9000 chain to work with 10-speed systems. Multiple crankarm lengths and standard/compact ring setups are all available.
A good power meter.