Shimano Dura Ace FC-R9100-P Hollowtech II Power Meter Cranks w/o Chainrings

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Shimano Dura Ace FC-R9100-P Hollowtech II Power Meter Cranks w/o Chainrings - black/172.5 mm
Shimano Dura Ace FC-R9100-P Hollowtech II Power Meter Cranks w/o Chainrings - black/172.5 mm
Shimano Dura Ace FC-R9100-P Hollowtech II Power Meter Cranks w/o Chainrings - black/172.5 mm
Shimano Dura Ace FC-R9100-P Hollowtech II Power Meter Cranks w/o Chainrings - black/172.5 mm
  • 100 day return period
  • Online since 1998
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The Dura Ace FC-R9100-P Power Meter Crankset by Shimano - Real-Time Power Measurement

Shimano presents its first-ever powermeter - the Dura Ace FC-R9100-P crankset. This crankset was developed in collaboration with, Shimano's sister company specialising in bike ergonomics. Power is measured using the crank arm from both the left and right sides. The cadence and other values essential for training (such as B rounds) are part of the functionality of the power meter. It can be paired with bike computers enabled with ANT+ or Bluetooth. The FC-R9100-P cranks harness real-time power measuring and recording, and can aggregate and assess measurement data. Just like „normale“ FC-R9100 without power measuring, the Power Meter crankset is a hollowtech crankset with hollow forged aluminium arms and Hollowtech II construction for an optimum stiffness-to-weight ratio. The chainstays in the present version are not included. Only the chainring bolts are included.

Information regarding the return of batteries and electrical equipment:

Learn more about returning and recycling used batteries and electronic devices here.


Application: Road, Triathlon
Type: power meter cranks (on both sides)
Compatibility: 2-speed
Chainring Mount: 110 mm pitch circle, 4-arm asymmetrical

Technical Information:

Series: Dura Ace R9100
Crankarm Material: aluminium
Axle Material: steel
Crankarm Length: 165.0 mm, 170.0 mm, 172.5 mm, 175.0 mm, 177.5 mm, 180.0 mm
Chainline: 43.5 mm
Q-Factor: 146 mm
Axle Diameter: 24 mm
Compatible BSA Shell Width: 68 mm
Recommended Bottom Bracket: BB-R9100 or SM-BB92-41B Pressfit Hollowtech II (not incl.)
Recommended Chain: HG-EV 11-speed, HG-X11 (e.g. CN-HG901-11)
Tolerance: +/- 2 %
Point of Measurement: crankarm
Power Source: lithium-ion battery, integrated
Battery Life: min. 300 h
Data Collected: cadence, power, right-left balance, pedal stroke uniformity, torque
Data Transfer: ANT+, Bluetooth LE


- integrated design
- water-resistant and designed for use in rainy weather
- integrated, rechargeable battery (charging time 2.5 h)
- fast system start and direct response
- total power and separate measurement of left and right leg (strain gauges in the crankarms)
- simple manual zeroing by pressing a button
- Firmware updates via E-Tube Project
- easy chainring change, because strain gauges are integrated in the crankarms and power meter in the spider
- charging via magnetic adapter
- communication with ANT+ or Bluetooth LE-enabled devices
- anodised crankarms
- FC-R9100 chainrings sold separately


Lightweight cranks reduce the total weight of the bike and above all the rotating mass which is decisive for acceleration. The challenge is to reduce the weight of the cranks without compromising stability and load capacity. Shimano's state-of-the-art forging technology offers an ideal solution with the Hollowtech cranks. Just like a high-quality frame tube, the hollow crankarm is extremely stable and resilient at a very low weight.

Hollowtech II
Hollowtech II technology was developed during the manufacturing process of an optimised crankset, which minimises riders' energy expenditure into the drivetrain. The higher lateral force stiffness guarantees efficient power transmission while pedalling, while the light weight leaves the rider unencumbered especially during longer stretches. The development of the crankset succeeds in regards to an optimal ratio between stiffness, rotational efficiency, low weight and an attractive appearance. Hollowtech Technology allows for an extremely light and hollow crank arm with exclusive forging technology from Shimano to achieve a maximum stiffness. The Hollowtech II crankset also includes a right crank connected to the bottom bracket axle, achieving an optimum balance between maximum stiffness and minimal weight. The external mounted inner bearing offers better weight distribution and stability for more efficient power transmission.

The " brain" of the power meter, the central measuring unit, is housed in the Dura Ace crankset's case, while the strain gauges are integrated into the the crank arm, which measures left and right input power separately. The central measuring unit is compact, and fixed discreetly and inconspicuously behind the chainstays. This makes it the lightest and cleanest integrated system on the market. This construction enables the chainstay to be changed out easily, without compromising the precision of the power meter. Shimano's new E-Tube Platform makes system checks or firmware updates easily possible through Bluetooth-supported communication over smartphones and tablets. To ensure communication and display data across multiple bike computers or GPS devices, the power meter crankset is equipped with Bluetooth and ANT+. An integrated rechargeable battery supplies the power meter with energy. The battery is charged via a small magnetic adapter, eliminating the need for a cap or cover and maintaining weather resistance under all conditions.

Manufacturer Part Numbers:

165.0 mm: I-FCR9100PAXX
170.0 mm: I-FCR9100PCXX
172.5 mm: I-FCR9100PDXX
175.0 mm: I-FCR9100PEXX
177.5 mm: I-FCR9100PFXX
180.0 mm: I-FCR9100PGXX


- 1 x Shimano Dura Ace FC-R9100-P cranks, incl. power meter sensors
- 1 x Shimano crank bolt
- 1 x magnet set
- 1 x 1.5 m charging cable
- 1 x magnet positioning tool
- 1 Shimano TL-FC40 crank installation tool
- 4 x chainring bolts
- not incl. chainrings
- not incl. bottom bracket


in stock 2 to 7 days up to 10 days Out of stock inform me
  • black/165.0 mm
  • black/170.0 mm
  • black/172.5 mm
  • black/175.0 mm

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