Skip to main content

Stages Shimano Ultegra R8100 Right Side Power Meter

Niel Ubod April 12, 2024


Stages power on a Shimano Ultegra R8100 right side crank arm

Clear selection

Stages Shimano Ultegra R8100 Right Side Power Meter

If you currently have a Stages Shimano 8100 left side crank arm, this Stages Shimano Ultegra R8100 Right Side Power Meter allows you to upgrade to a dual-sided power meter. With power sensors on both crank arms, you can measure and record total as well as independent L/R power measurement.

In addition, some bike frames cannot fit a left side crank arm-based power meter due to clearance issues with the chainstay. In these situations, this Stages right side power meter is a perfect solution. It allows you to quickly and easily add power to the right side of your crankset where clearance and compatibility issues don’t exist.

This power meter combines Shimano’s award-winning Ultegra R8100 groupset with Stages Cycling’s proven performance and dependability. The result is an accurate, lightweight, durable power that comes ready to ride on a Shimano R8100 right crank arm. The Stages power meter runs off of a CR2032 battery and features 200 hours of battery life. In addition, the power meter is extremely lightweight – adding only 20 grams to the weight of the crank arm. All Stages power meters are compatible with both ANT+ and Bluetooth SMART devices. This means you can use your favorite bicycle computer as well as a smartphone or tablet.


Key Product Details


This power meter is compatible with Shimano R8100 cranksets. It can also be installed on other Shimano road cranksets, as long as they use Shimano’s Hollowtech II interface. See Compatibility tab for more information.

Power Measurement:

This Stages power meter measures right leg power and doubles the value to account for both legs (assumes both legs are generating the same force).

Key Features:

Affordable, accurate to within +/- 1.5%, lightweight at only 20 grams of added weight, 200+ hours of battery life, CR2032 user-replaceable battery, ANT+ and Bluetooth compatible, easy to install. See Specs tab for more information.

Advice From Our Staff:

This right side power meter is a great option for those with a Stages R8100 Left Side Power Meter that want to upgrade to a dual-sided crankset. It’s also a perfect option if your frame doesn’t allow you to install a left side crank arm.


Options For This Power Meter

  • Crank arm lengths: 160 mm | 165 mm | 170 mm | 172.5 mm | 175 mm
  • Chainring sizes: 50/34 | 52/36


Other Versions to Consider

Dual-Sided R8100 Crankset: We also sell the Stages Shimano Ultegra R8100 Dual-Sided Power Meter which is a complete crankset. It is more expensive, however it measures power from both legs.

Left Side R8100: We also sell the Stages Shimano Ultegra R8100 Power Meter which is a left side crank arm only. It is more affordable, however it doesn’t come with chainrings.


This power meter is compatible with Shimano Ultegra R8100 cranksets.

Stages R8100 Right Side Power Meter Specs

NameStages R8100 Right Side
Bike TypeRoad
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredRight only
Independent Left/Right MeasurementNo
Crank Arm MaterialAluminum
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.5%
Automatic Temp. CompensationYes
Weight20 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life200+ hours
Method of Cadence MeasurementAccelerometer
Warranty1 year

In the Box

  • Stages Right Side Power Meter
  • Shimano Ultegra R8100 chainrings
  • 2032 coin cell battery
  • Quick Start guide

Left crank arm not included.

Tools Needed for Installation

You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.

  • 5 mm Allen key
  • Shimano Crank Arm Cap Tool
  • Phillips screwdriver

Common Questions and Answers

Question: Does this power meter come with a left crank arm too?

  • No, this power meter is a Stages right side crank arm only. Assuming you currently have a Shimano Ultegra R8100 crankset on your bike, you swap out your right side crank arm for this power equipped version, and you keep your current left side crank arm on the bike.

Question: How do I pair my new Stages right side power meter with my current left side?

Question: How do I determine what length my current cranks are so I can make sure I get the same size?

  • Your crank arm length should be printed or stamped on the inside of the left crank arm, usually near the pedal end.

End of crank arm showing crank arm length


There are no reviews yet.

Be the first to review “Stages Shimano Ultegra R8100 Right Side Power Meter”

The maximum upload file size: 5 MB. You can upload: image, audio, video, document, spreadsheet, interactive, text, archive, code, other. Links to YouTube, Facebook, Twitter and other services inserted in the comment text will be automatically embedded. Drop file here



Shopping Cart