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Sigeyi AXO Shimano MTB Power Meter

Josh Matthew July 11, 2024
5.00 out of 5 based on 2 customer ratings
(2 customer reviews)


Accurate, affordable, dual-sided power for your Shimano direct mount MTB crankset!

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Sigeyi AXO Shimano MTB Power Meter

The Sigeyi AXO Shimano MTB Power Meter is a spider-based power meter that is compatible with Shimano direct mount MTB cranksets. The Sigeyi power meter measures power from both legs, is accurate to +/- 1.0% and is lightweight at only 83 grams. In addition, it easily bolts up to your existing Shimano crankset. Therefore, there is no need to buy new cranks or replace your bottom bracket.

The power meter also features a rechargeable battery with 300 hours of ride time, auto-zero functionality (so your data is always accurate), left and right leg power balance and a 2-year manufacturers warranty. Of course, you also get Bluetooth SMART. This allows you to use the power meter with your favorite indoor training program or app.

Important Tool Needed

If you are purchasing the 1X 100×8 version, you will need the Sigeyi Chainring Bolt Tool for Shimano 100×8, unless you already have the same type of tool. The bolts on the these chainrings require a specific hollow tip tool for removal and installation.


Key Product Details


This Sigeyi is compatible with Shimano MTB direct mount cranksets using a 1x chainring. This includes the M9100, MT900-1, M8100, M7100, M6100 and MT610. Regarding chainrings, it requires a 104 BCD 4-bolt MTB chainring (which is different than the direct mount chainrings found on many Shimano MTB cranksets). If you don’t already have a 104 BCD 4-bolt chainring, we offer several to choose from. See Compatibility tab for more information.

Power Measurement:

The Sigeyi power meter measures power at the spider and is therefore able to measure power from both legs.

Key Features:

Dual-leg power measurement, accurate to +/- 1.0%, 300 hours of battery life, rechargeable battery, very lightweight, left/right power balance, ANT+ and Bluetooth compatibility, auto-zero (automatic calibration). See Specs tab for more information.

Advice From Our Staff:

The Sigeyi is a great way to add power to Shimano MTB direct mount cranksets. It measures power from both legs, is accurate and affordable. In addition, since it bolts on to your existing crankset, there is no need to buy new cranks or change bottom brackets. It is also lightweight which makes it a great option for cyclists looking to minimize added weight.


Options For This Power Meter

BCD: This power meter is available in the following versions:

  • 1X 104×4 (For 104×4 Chainring)
  • 1X 100×8 (For Shimano Chainring)

Please see Compatibility Tab for more information on these two versions.


Crankset: The Sigeyi Shimano MTB Power Meter is compatible with Shimano MTB direct mount cranksets such as the M9100 series, MT900-1, M8100 series, M7100 series, M6100 series, MT611-1 and MT610.

Chainrings: This power meter requires either a 104 BCD 4-bolt MTB chainring or a Shimano 100 BCD 8-bolt chainring, based on the version ordered. If you don't already have a compatible chainring, we have several to choose from.

The smallest 104x4 chainring you can use on a Sigeyi MTB power meter is a 30T round or 32T oval.

The smallest Shimano 100x8 chainring you can use on a Sigeyi MTB power meter is a 32T.

Sigeyi AXO Shimano MTB Specs

NameSigeyi Shimano MTB Power Meter
Bike TypeMTB
Location of Power MeasurementSpider
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes - Power Balance
InstallationMore involved (60 min. estimated)
Chainring Configuration1X or 2X
Speeds11- or 12-speed
Chainline SpacingStandard, Boost or Super Boost
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Active Temperature CompensationNo (however features Auto Zero)
Weight83 grams
Battery TypeRechargeable
Battery Life300 hours
Method of Cadence MeasurementAccelerometer
BCD104 or 100
Warranty2 years

In the Box

  • Sigeyi power meter
  • Charging cable
  • User's manual
  • Decals: Black, Red, Green, Silver, Blue

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.

For Shimano 100x8 chainrings

For Shimano XTR 9100

  • 8 mm Allen key
  • Shimano Direct Mount Lock Ring Tool

For Shimano XT 8100/Shimano SLX 7100

  • 5 mm Allen key
  • Shimano Direct Mount Lock Ring Tool
  • Shimano Crank Arm Cap Tool
2 reviews for Sigeyi AXO Shimano MTB Power Meter
  1. Jim Messer (verified owner)

    This is my second Sigeyi power meter. Why did I buy another? My other bike is my fun bashing bike- and I wanted an affordable, dead on power meter. I got just that- again. I took off the 8 security bolts- which was a pain, but I was able to do it. It’s super easy to strip them, so bring your patience and don’t rush them. I got the new spider on with my 34t and on my bike it went. I charged it to 100% and paired it easily with my Garmin 840. Super happy with this meter. And of course- even more important- I am happy with power meter city. Great people to deal with.

    • Power Meter City

      Hi Jim, thanks for the kind words! We’re happy to hear this power meter is working well enough you’ve added to your collection. Thanks for the detailed response, we’re here if you need anything else. Happy riding!

  2. Scott (verified owner)

    This is not a long term review since I’ve only had this a couple weeks and done a few rides with it. Overall very happy so far. I was a little skeptical not having ever heard of this company before, but after reading some credible reviews online I decided to try it out. The setup was very simple once I had the proper security torx bit and spider tool to remove the stock spider and then separate it from the chainring. FWIW, the spider tool can be had for less than $10 and I found the right torx security bit at my local Ace for $4. Accuracy was my big concern but after having done some testing of this vs my Assioma Duo pedals as well as on the Saris H3 trainer, both indicated this power meter was well within 1% of the readings from both of those other sources for any interval over 30 seconds (accuracy measurement on intervals less than 30 seconds always shows more variation across all power meters in my experience) so I haven’t even needed to adjust the power scaling on this, but I’m glad I have that option via the app in case it ever becomes necessary. That’s actually quite impressive accuracy in my experience and I’ve had quite a few power meters over the years, most quite a bit pricier than this. Its worth noting that even though this is dual sided measurement, the power balance metric accuracy has its limits because its trying to measure left side power sensing the strain registered on the spider which is on the right side: some calc adjustments are involved there. I think this makes the overall power measurement even more impressive really, but you can very quickly see where the balance calculations fall apart if you try pedaling with just one leg: the result is not 100%/0%. But as long as you’re pedaling with both legs and don’t have a balance skew worse than maybe 65/35 this thing tends to be right on point so from a practicality standpoint there’s really nothing to criticize here. I also like the design of this power meter for MTB purposes because its almost entirely out of harm’s way. And for the price, is there a better value out there? If you want power on your MTB then I would not hesitate to suggest this option. If I had to pick all over again, I’d go right back and buy this same thing.

    • Power Meter City

      Hi Scott, thanks for providing this valuable insight into the Sigeyi AXO Shimano MTB Power Meter! We’re glad this product has been working well for you, it’s quickly become one of our staff favorites! We’re stoked to see all the data comparison too! Enjoy the riding!

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