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Shimano FC-R9100-P Dura Ace Power Meter Hollowtech II Crankset -172.5mm (53/39)

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The Shimano FC-RC9100-P power meter: the essential performance tool for every cyclist who wants to achieve their true potential. By gathering real-time accurate and reliable power output data, you can track and analyse every detail of your ride. You can then use this potent information to tune your training and racing for maximum results.
Power meters are one of the fastest growing technologies in cycling. In just a few years, they have moved from being pro-only equipment to affordable training aids for amateur racers and keen recreational riders.


Application: Road (power meter)
Compatibility: Shimano 2×11-speed
Chainring Mount: 110 mm bolt circle diameter, 4-arm asymmetrical

Technical Information:

Series: Dura Ace R9100
Crankarm Material: aluminium
Chainring Material: aluminium, CFRP / aluminium
Axle Material: steel
Gradation: 34-50, 36-52, 39-53
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 (Hollowtech II)
Compatible BSA Bottom Bracket Shell Width: 68 mm
Recommended Bottom Bracket: BB-R9100 or SM-BB92-41B Pressfit Hollowtech II (not included)
Recommended Chain: HG-EV 11-speed, HG-X11
Battery: rechargeable
Charge Time: 2.5 h
Battery Life: at least 300 h
Measured Values: cadence, power, right-left-balance, pedal stroke uniformity, torque
Measurement Technology: strain gauge
Power Measurement Accuracy: +/- 2 %
Protocol: ANT+, Bluetooth® LE


– integrated design
– waterproof in all conditions
– integrated rechargeable battery
– possible to start quickly
– direct response
– both left and right side connected with cable
– simple zero reset with switch on transmitter
– wireless firmware update system (E-Tube Project)
– easily change chainrings without affecting power meter performance
– anodized crankarms and chainrings
– aluminium chainring bolts, anodized


A lightweight crankset not only reduces the bikes weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. Shimano’s advanced forging technology has solved the problem tough the Hollowtech crank. Just like the high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very low weight.

Hollowtech II
The concept of Hollowtech II technology is focused on producing a superior crankset, which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedalling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank.
Outboard Bearings: For most frames with 68 mm bottom bracket shells, Hollowtech II with 24 mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.
High Precision Sealing: Hollowtech II cranksets have a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.

Highly rigidity hollow structure cuts down on weight yet maintains strength. Better power transfer and more precise front shifting.

Power Meter
The Shimano FC-R9100-P power meter guarantees reliability. It boasts a completely sealed, crank-integrated design that is waterproof in all conditions. The built-in battery is recharged by a small magnetic adapter, so there is no cover to open. The direct instant response system ensures accurate data collection for stable power measurement at various stepping positions. Plus a simple reset by a switch on the transmitter. It is compatible with third party displays as well as Bluetooth and ANT technology.

Factory Numbers:

170.0 mm 34-50: I-FCR9100PCX04A
172.5 mm 34-50: I-FCR9100PDX04
175.0 mm 34-50: I-FCR9100PEX04
170.0 mm 36-52: I-FCR9100PCX26
172.5 mm 36-52: I-FCR9100PDX26
175.0 mm 36-52: I-FCR9100PEX26
170.0 mm 39-53: I-FCR9100PCX39A
172.5 mm 39-53: I-FCR9100PDX39
175.0 mm 39-53: I-FCR9100PEX39


– 1 x Shimano Dura Ace FC-R9100-P crankset (34-50, 36-52 or 39-53 tooth), power meter included
– 1 x Shimano crank bolt
– 1 x magnet set
– 1 x 1.5 m charging cable
– 1 x magnet positioning tool
– 1 x Shimano crank installation tool TL-FC40
– bottom bracket not included


Chainset Type

Crank Arm Length

Bolt Circle Diameter - BCD

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