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Stages Cycling Gen 3 Ultegra FC-R8100 LR Power Meter Crankset
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Stages Cycling Gen 3 Ultegra FC-R8100 LR Power Meter Crankset


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Mfg PartNum:
$864.99 set
MSRP: $864.99
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Bilateral Stages Power On An Ultegra 8100 Platform

Stages power is now available on Shimano's newest FC-8100 series groupset. The Stages Cycling Ultegra FC-R8100 Power Meter replaces your Ultegra 8100 series crankset, providing balanced, left and right-specific dual-sensor bilateral power measurement and data tracking. Like all Stages power meters, this unit features +/- 1.5% accuracy, 200 hours of battery life and is extremely lightweight. In addition, the power meter is compatible with both ANT+ and Bluetooth SMART devices. This means you can use a bicycle computer with ANT+ or your smartphone or tablet with Bluetooth SMART.

The new Stages Generation 3 power meter features radio antennas that are 6x more powerful than the previous version. This means better compatibility with both bike computers and watches. The Gen 3 also features improved accuracy and has an LED indicator light on the housing for improved ease of use.


  • Stages dual-sensor Ultegra 8100 series crank arm-based power meter
  • Dual-sided bilateral power measurement
  • Aluminum construction
  • ANT+ and bluetooth SMART compatible
  • Accuracy within +/- 1.5%
  • Automatic temperature compensation
  • CR2032 coin cell battery
  • 200+ hours battery life
  • Accelerometer cadence measurement
  • Available in 170-175mm crankarm length options
  • Chainring combinations are available in 50/34t and 52/36t options

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Please note: This product ships signature required.


160mm - 50/34t

Mfg PartNum: U81-Z4 

165mm - 50/34t

Mfg PartNum: U81-A4 

170mm, 50/34t

Mfg PartNum: U81-C4 

172.5mm, 50/34t

Mfg PartNum: U81-D4 

175mm, 50/34t

Mfg PartNum: U81-E4 

165m - 52/36t

Mfg PartNum: U81-A6 

170mm, 52/36t

Mfg PartNum: U81-C6 

172.5mm, 52/36t

Mfg PartNum: U81-D6 


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Reviewed 8/5/2023
by Bruce C.
Boynton Beach, Fl
Overall Rating
Power Meter

8100 power meter is an awesome tool for training and riding.

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