Stages Shimano Ultegra R8100 Dual-Sided Power Meter

Stages Shimano Ultegra R8100 Dual-Sided Power Meter

The Stages Shimano Ultegra R8100 Dual-Sided Power Meter features Stages proven performance and dependability on a Shimano Ultegra R8100 crankset. With a power sensor on both crank arms, this Stages power meter measures power from both legs and also provides L/R power measurement, making it a valuable training tool. In addition, its accurate to 1.5%, features dual ANT+ and Bluetooth SMART compatibility and runs off two CR2032 batteries. The Stages R8100 Dual-Sided Power Meter is extremely lightweight, adding only 35 grams to the crankset.

 

Key Product Details

Compatibility:

This power meter is compatible with 2×12 road drivetrains and 24 mm Shimano bottom brackets. Most customers that buy it already have a Shimano R8100 crankset on their bike and therefore, it’s an easy swap. However, it can be used on any road bike as long as its 2×12 with a 24 mm bottom bracket. See Compatibility tab for more information.

Power Measurement:

This Stages power meter has a power sensor on both crank arms and measures power from both legs. It is also able to measure your left vs. right leg power.

Key Features:

Dual-leg power measurement, can measure left vs. right leg power, accurate to within +/- 1.5%, lightweight at only 35 grams of added weight, 200+ hours of battery life, CR2032 user-replaceable battery, ANT+ and Bluetooth compatible. See Specs tab for more information.

Advice From Our Staff:

This is a great option for customers with a Shimano R8100 drivetrain that want to keep an OEM R8100 crankset on their bike but add power. We also like that fact that this crankset measures power from both legs and as well as provides left vs. right leg power.

 

Options For This Power Meter

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

Compatibility

Bottom Bracket: This power meter is compatible with 2×12 road drivetrains and 24 mm Shimano bottom brackets. Most customers that buy it already have a Shimano R8100 crankset on their bike and therefore, it’s an easy swap. However, it can be used on any road bike as long as its 2×12 with a 24 mm bottom bracket.

Check Frame Clearance: Crank-arm based power meters like this one attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance between the left crank arm and the chainstay – and that you don’t have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below.

If you find that you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need.

In the Box

• Stages Crankset Power Meter
• 2 2032 coin cell batteries
• Lifetime access to Stages Link for power meter management and firmware upgrade
• 2 months free access to Stages Link premium training and coaching features
• User Guide

Specs

Name	Stages R8100 Dual-Sided
Bike Type	Road
Location of Power Measurement	Crank arm
Left or Both Legs Measured	Both
Independent Left/Right Measurement	Yes
Installation	More involved (60 min. estimated)
Crank Arm Material	Aluminum
Communication Protocol	ANT+ and Bluetooth SMART
Claimed Accuracy	+/- 1.5%
Active Temperature Compensation	Yes
Weight	35 grams (added weight)
Battery Type	CR2032 coin cell
Battery Life	200+ hours
Method of Cadence Measurement	Accelerometer
BCD	110 4-bolt asymmetric
Spindle Size	24 mm
Q Factor	146 mm
Warranty	1 year

Why Buy from Power Meter City

1. We ship fast! All orders ship on the same day your order is placed!

2. Free shipping on all orders in the U.S.

3. We are an authorized Stages dealer and this product comes with a full warranty.

4. Expert advice and customer service in case you need any help.

5. We offer a free, 30-day return policy on new items.

6. We offer 20% off TrainingPeaks Premium when you buy a power meter.

About our Company

At Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service.

We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.