Skip to main content

power2max NGeco Praxis DOON Carbon Gravel Power Meter Crankset

Niel Ubod June 19, 2024


power2max gravel power on a Praxis DOON carbon crankset!

Clear selection

power2max NGeco Praxis DOON Carbon Gravel Power Meter Crankset

The power2max NGeco Praxis DOON Carbon Gravel Power Meter Crankset is a lightweight carbon crankset designed to tackle any trail. The NGeco is the newest model in the power2max line-up. It offers dual leg power measurement, ANT+/Bluetooth SMART compatibility and left/right power balance. The NGeco is also accurate to +/- 2.0%, has an auto-zero feature so your data is always accurate and accelerometer-based cadence measurement. This power meter also uses a CR2450 replaceable battery that provides 300-400 hours of battery life. This is perfect for long adventures where rechargeable power meters may not provide long enough battery life.

Praxis DOON carbon crank arms are lightweight at only 342 grams (172.5 mm) and use a 30 mm spindle. This makes these crank arms compatible with a range of bottom brackets. The DOON cranks also have an updated preload collar which ensures reliability and easy adjustment.


Key Product Details


This power meter fits 30 mm bottom brackets. It comes with power2max gravel chainrings and features a GRX 47 mm chainline. See Compatibility tab for more information.

Power Measurement:

The power2max power meter measures power at the spider and is therefore able to measure power from both legs.

Key Features:

Dual-leg power measurement, carbon fiber crank arms, accurate to +/- 2.0%, 300-400 hours of battery life, CR2450 user-replaceable battery, left/right power balance with system upgrade, ANT+ and Bluetooth compatibility, auto-zero (automatic calibration). See Specs tab for more information.

Advice From Our Staff:

The power2max NGeco Praxis DOON Power Meter Crankset is an excellent crankset for gravel adventures. The power2max NGeco provides accurate data and a replaceable battery means you can change it on the side of a trail, removing the issue of battery life. The Praxis DOON cranks are Praxis’ premier cranks. They are very lightweight and unlike most of Praxis’ lineup, use a 30 mm spindle. This makes for a very versatile crankset.


Options For This Power Meter

Chainrings: You can order this power meter in a 1X or 2X chainring configuration.

  • 1x chainring sizes are: 38 | 40 | 42 | 44 | 46
  • 2x chainring sizes are: 46/30 | 48/31

Crank arms: The Praxis DOON carbon crank arms come in the following crank arm lengths:

  • 165 mm | 170 mm | 172.5 mm | 175 mm

Please note – this power meter ships with a Black decal. Please let us know if you would like us to include a different color instead (Red, Blue, White, Green).


Professional Assembly (Optional) power2max Build Checklist

We are happy to professionally assemble your power meter crankset if you select this option when ordering. This ensures your crankset is correctly built and saves you time. Professional assembly includes:

  • Mount the power meter to the cranks and tighten to factory specifications
  • Apply multi-purpose bicycle grease where necessary
  • Install chainrings on the power meter (if chainrings are ordered)
  • Apply power2max decal

Please note – while we tighten everything to factory specs, it is still your responsibility to routinely check your power meter crankset to make sure all bolts and nuts remain securely fastened.


Other Versions to Consider

power2max NGeco Praxis Zayante: We also have the power2max NGeco Praxis Zayante Carbon Gravel Power Meter Crankset which uses Praxis Zayante carbon crank arms and an M30 spindle. This version is slightly more affordable.



  • 1x chainrings: Compatible with 11- and 12-speed drivetrains (not compatible with SRAM 12-speed chains).
  • 2x chainrings: Compatible with 9-, 10- and 11-speed drivetrains as well as with 12-speed Shimano, SRAM and KMC chains.

Bottom Bracket: This power meter fits 30 mm bottom brackets. If you currently use a crankset with a 30 mm spindle, you should be able to re-use your existing bottom bracket. However, if you are changing spindle sizes, you will need to replace your bottom bracket.

power2max NGeco Praxis DOON Specs

NameNGeco Praxis DOON Gravel Crankset
Bike TypeGravel
Location of Power MeasurementSpider
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes - Power Balance (available via upgrade)*
InstallationMore involved (60 min. estimated)
Crank Arm MaterialCarbon Fiber
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 2.0%
Active Temperature CompensationNo (however features Auto Zero)
Weight477 grams (power meter and cranks)
Battery TypeCR2450
Battery Life300-400 hours
Method of Cadence MeasurementAccelerometer
BCD104 4-bolt
Spindle Size30 mm
Q Factor147 mm
Praxis Warranty2 years
power2max Warranty2 years

*Power Balance Upgrade

The power2max NGeco measures power from both legs right out of the box. However, with power balance, you can see how much power each leg is generating individually. If this information is important to you, you can choose to upgrade the power meter at any time. (Please note, you can also purchase the NG version of the power2max which comes with this feature unlocked, along with a rechargeable battery and a longer 5-year warranty.)

You can upgrade your NGeco using the power2max app once you receive the power meter. The cost to upgrade is 50 euros.

In the Box

  • power2max power meter
  • Praxis DOON carbon crank arms and spindle
  • power2max gravel chainrings
  • CR2450 battery
  • User's manual

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

Common Questions and Answers

Question: Can I use this power2max Gravel power meter on a Shimano road drivetrain?

  • Great question! This power2max Gravel power meter features a GRX 47 mm chainline. This is wider than the 44 mm chainlines used on Shimano road drivetrains such as 105, Ultegra and DURA-ACE. However, the chainline on this gravel crankset can be converted to the narrower 44 mm road chainline by use of a power2max MTB Adapter Plate. The adapter plate is placed between the power meter and the gravel chainring, which moves the chainring closer to the bike and gives you a Shimano road chainline.

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 “power2max NGeco Praxis DOON Carbon Gravel Power Meter Crankset”

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