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Stages Shimano XTR M9100/M9120 Power Meter
November 14, 2025Add Stages power to your Shimano M9100 or M9120 model crankset
This product has been discontinued. We suggest customers consider the 4iiii PRECISION 3+ Shimano XTR M9100 Power Meter.
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Stages Shimano XTR M9100/M9120 Power Meter
The Stages Shimano XTR M9100/M9120 Power Meter brings power to M9100 and M9120 MTB cranksets. Simply remove your current left-side crank arm and replace it with your Stages power meter and you’re set!
This Stages power meter features +/- 1.5% accuracy, 200 hours of battery life and is lightweight at only 15 grams of added weight. The power meter is compatible with both ANT+ and Bluetooth SMART devices. This means it’s compatible with your favorite bike computer, smart phone or tablet.
Key Product Details
Compatibility:
This Stages power meter is only compatible with XTR M9100/9120/9130 cranksets. See Compatibility tab for more information.
Power Measurement:
This Stages power meter measures left 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 15 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:
Stages left side crank arms are some of our best-selling units. They work with most Shimano cranksets, are affordable and easy to install. The one consideration is they only measure left leg power compared to some other power meters that measure power from both legs (those versions usually cost more however).
Options For This Power Meter
Crank arm lengths: This power meter is available in the following crank arm lengths:
- 170 mm
Other Versions to Consider
Dual-Sided XTR M9100/M9120 Crankset: We also sell the Stages Shimano XTR M9120 Dual-Sided Crankset which is a complete crankset. It is more expensive, however it measures power from both legs.
Right-Side XTR M9100/M9120 Crank Arm: If you currently have a Stages Shimano XT M8100/8120 left side crank arm, we have the Stages Shimano XTR M9120 Driveside Power Meter which allows you to upgrade to a dual-sided power meter. Or, some bike frames cannot fit a left side crank arm-based power meter due to clearance issues with the chainstay. In these situations, the Stages right side power meter is a perfect solution.
Compatibility
Crankset: The Stages power meter is only compatible with XTR M9100/9120/9130 cranksets. It is not compatible with any other Shimano cranksets, including M9200 cranksets, due to a different design. Please contact us if you have any questions on compatibility.
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.
Stages Shimano XTR M9100/M9120 Specs
| Name | Stages Shimano XTR M9100 |
| Bike Type | MTB |
| Location of Power Measurement | Crank Arm |
| Left or Both Legs Measured | Left only |
| Independent Left/Right Measurement | No |
| Installation | Easier |
| Crank Arm Material | Aluminum |
| Communication Protocol | ANT+ and Bluetooth SMART |
| Claimed Accuracy | +/- 1.5% |
| Automatic Temp. Compensation | Yes |
| Weight | 15 grams (added weight) |
| Battery Type | CR2032 coin cell |
| Battery Life | 200+ hours |
| Method of Cadence Measurement | Accelerometer |
| Warranty | 1 year |
In the Box
- Stages Power Meter
- 2032 coin cell battery
- Quick Start guide
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.
- 8 mm Allen key
Q&A
Have a question about this? Ask the staff.
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