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Stages Cycling
Shimano Dura-Ace R9100 R Power Meter Crank Arm

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Why We Like The Shimano Dura-Ace R9100 R Power Meter Crank Arm

Deciding what power meter to get can be a difficult decision, but if your running Shimano's current top-tier road group, with choices like the Shimano Dura-Ace R9100 R Gen 3 Power Meter Crank Arm with Chainrings from Stages Cycling, it helps us make up our minds pretty quickly. This driveside crank gets big marks in our books as it allows you to run a complete Dura-Ace drivetrain so you don't have to part with those precise shifting rings and excellent stiffness of the 4-arm asymmetric design. Sure, there are other options on the market that utilize the 9100 crankset, but none offer quite the simplicity and come in at a price that compares to this Stages model. Now you can train like the pros with power while choosing something that comes in at a price that's affordable in the powermeter world. This driveside crankarm transmits power data from a pod near the spider for accuracy and doesn't suffer from clearance issues with the frame as the non-drive side crankarms sensors and chainstays were prone to do, all while maintaining the beauty of a complete Dura-Ace R9100 group with its wide and stiff crank arms and precisely shifting rings.

As we mentioned above, this Stages crankarm is an ideal option if your bike is currently outfitted with a Dura-Ace 9100 group. That way, the crank perfectly matches the aesthetic of the complete group, providing you with all of the engineering bestowed by the Shimano engineers, with power measurement readings courtesy of the Stages engineers. The power meter is tiny and only adds a nominal 20-grams to Dura-Ace's base weight. Tucked inside this little pod are strain gauges and an updated accelerometer that measures force and rotation delivering the power readings to your head unit with a claimed accuracy of +/- 1.5%, which is right in line with other quality power meters on the market.

The meter also incorporates Stage's Active Temperature Compensation (ATC), which compensates for the natural expansion and contraction of the strain gauges and adjusts the readings depending on external temperature. ATC accounts for those temperature changes without requiring you to stop pedaling in order to zero the system. Other weather factors to consider are the rain and wet, and Stages protects the power meter with a water resistance rating of IPX7, keeping the internal electronics dry during rainy rides and bike washes. Stages meters are mountain and 'cross bike tough even through creek crossings and Team Sky post-race power washings, and the IPX7 rating gives the meter protection from the wet in 1-meter deep water for up to 30 minutes. The power meter is powered by a readily available CR2032 battery and offers up to 175 hours of riding with data, with an easy to replace and simple Philips head screw access point. Gen 3 models receive upgraded Bluetooth LE and ANT+ radios which offer a 6-time improvement of data transmission strength so your head unit never misses a watt. Additionally, wireless firmware downloads are available to keep the power meter up to date.


  • Drive side only Dura-Ace crankarm and chainrings to measure power
  • Measures power with a +/-1.5% accuracy
  • Data is sent to your computer via ANT+ and Bluetooth LE signals
  • Active Temperature Compensation adjusts readings with temp swings
  • Upgraded accelerometer improves accuracy
  • New radios enable stronger wireless communication
  • Pairs with Stages Power App for firmware updates and zero resets
  • 175+ hour battery life with user serviceable CR2032 coin cell battery
  • Item #SGC001B
Arm Material
Arm Length
165mm, 170mm, 172.5mm, 175mm
Chainring Sizes
50/34t, 52/36t, 53/39t
Bolt Circle Diameter
110mm asym
BB Type
Hollowtech II
Q Factor
Compatible Components
Shimal 11-speed road
Claimed Weight
[53/39t] 696g, [52/36t] 695g, [50/34t] 685g
Manufacturer Warranty
1 year