Stages Shimano XT M8100/8120 Power Meter
March 19, 2023$389.99
Add Stages power to your Shimano XT M8100/8120/8130 crankset!
Stages Shimano XT M8100/8120 Power Meter
The Stages Shimano XT M8100/8120 Power Meter brings Stages power to your MTB bike! Compatible with the XT M8100/8120/8130 cranksets, the Stages power meter is accurate, durable and ready to handle the toughest terrain. Simply remove your current left-side crank arm and replace it with the Stages power meter and you’re done!
The power meter is extremely lightweight – adding only 15 grams to the weight of the crank arm. All Stages power meters are compatible with both ANT+ and Bluetooth SMART devices, which means you can use your favorite bicycle computer as well as a smartphone or tablet.
The 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 new versions also feature improved accuracy (+/- 1.5%) and have an LED indicator light on the housing for improved ease of use.
Key Product Details
Compatibility:
This Stages power meter is compatible with XT M8100/8120/8130 cranksets. It is also compatible with all other Shimano x100/x120/x130 series MTB cranksets such as the XTR M9100/M9120/M9130 or the SLX M7100/7120/7130. 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:
- 165 mm | 170 mm | 175 mm
Other Versions to Consider
Dual-Sided XT M8100/8120 Crankset: We also sell the Stages Shimano XT M8120 Dual-Sided Crankset which is a complete crankset. It is more expensive, however it measures power from both legs.
Right-Side XT M8100/8120 Crank Arm: If you currently have a Stages Shimano XT M8100/8120 left side crank arm, we have the Stages Shimano XT M8120 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 compatible with XT M8100/8120/8130 cranksets. It is also compatible with all other Shimano x100/x120/x130 series MTB cranksets such as the XTR M9100/M9120/M9130 or the SLX M7100/7120/7130.
It is not compatible with x000 series cranks such as the XTR M9000, XT M8000 or SLX M7000.
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 XT M8100/8120 Specs
| Name | Stages Shimano XT M8100 |
| 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.
- Shimano Crank Arm Cap Tool
- 5 mm Allen key
Common Questions and Answers
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.
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THIS PRODUCT IS FREQUENTLY BOUGHT WITH
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Contoured no-slip adjustable strap, ultra-slim sensor pod, Advanced Heart Rate Variability and more!
James (verified owner) –
Could not ask for more. I ordered this on Saturday and it was shipped same day; USPS delivered Monday. That’s about the fastest turnaround I can recall ever. The XT crankarm was well packed and exactly as expected; it works perfectly (I’ve had power meters for many years so no surprises). This is my second Power Meter City purchase and I’d not hesitate to come back for a third.
Power Meter City –
Thank you James – we really appreciate this! We are glad it arrive on time and it looks like you are enjoying them. Please let us know if there is anything else we can do!
Chris (verified owner) –
Excellent customer service and communication. Easy installation and setup. Accurate and useful data from the meter itself.
Power Meter City –
Thanks for this kind review Chris. We hope you will enjoy your new Stages power meter. We are here if there is anything else we can help you with! Ride safe!
Omer mun (verified owner) –
Great service, fast shipping .
The left arm stages power meter unit is a great cost effective option for power data.
Highly recommend.
Power Meter City –
Hi Omer. We are glad you finally have your Stages Shimano XT M8100/8120 Power Meter and it arrived on time! Let us know if there is anything else we can do!
David Williams (verified owner) –
Great product, easy to fit and setup. Accuracy is good and compares well to the double sided meter on my road bike.
Ordered from Australia and it arrived in under a week!
Power Meter City –
Hi David. Thanks for leaving a great review on your Stages Shimano XT M8100/8120 Power Meter. We are glad it arrived on time as expected. We hope you continue to enjoy them and we are here if there is anything else we can help you with!
Emmanuel Coutiño Moreno (verified owner) –
Cheap and reliable. Always agrees with my left side garmin vector 3; and paired with my drive side stages power meter, gives me perfectly consistent numbers, compared with my trainer. It’s a 9.5 out of 10, just because is left only.
Power Meter City –
Hi Emmanuel. Thanks for this review on your Stages. We hope you continue to enjoy them! We are here if there is anything else we can help you with!