power2max NGeco ROTOR p2m Edition 24MM Power Meter for GRX Chainrings
The power2max NGeco ROTOR p2m Edition 24MM Power Meter for GRX Chainrings is a direct replacement for your Shimano GRX crankset. Using the same 24MM spindle as your GRX crankset, this power meter will fit your current bottom bracket without any changes. In addition, it allows you to mount 1x or 2x GRX chainrings and uses an exact GRX Q factor.
Like all power2max power meters, the p2m power meter features dual leg power measurement, ANT+/Bluetooth SMART compatibility and left/right power balance. In addition, the NGeco is accurate to +/- 2.0% in all environmental conditions and is easy to use with features such as auto-zero and accelerometer-based cadence measurement.
ROTOR p2m Edition vs. ROTOR ALDHU
We offer this power meter with both ROTOR power2max Edition (what you are viewing now) and ROTOR ALDHU crank arms. Both of these crank arms work and fit the same, however power2max Edition is a slightly more budget friendly version of the ROTOR ALDHU version. The slightly more expensive ALDHU version has a nicer finish and is about 40 grams lighter.
Key Product Details
Compatibility:
This power meter is a direct replacement for your Shimano GRX crankset. It is compatible with Shimano GRX chainrings and Shimano 24 mm bottom brackets. It uses a GRX chainline and Q factor. 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, 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:
We highly recommend power2max power meters and use them on many of our own bikes. They measure power from both legs, are accurate and very reliable. We believe the price also represents a good value for what you get.
Options For This Power Meter
Crank arms: The ROTOR power2max Edition 24 mm 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).
p2m Gravel NGeco Power Meter Crankset Comparison
power2max makes two similar versions of its gravel power meter crankset. The p2m Gravel Power Meter Crankset and the p2m Power Meter for GRX Chainrings. Please note, each version comes in a variety of different crank arm options, hence the range of prices and spindles, below.
| p2m Gravel Power Meter Crankset | p2m Power Meter Crankset for GRX Chainrings |
| Price | $660 – $1,035 | $690 – $790 |
| Spindles | 24 mm, 30 mm, Praxis M30 | 24 mm |
| BCD | 104 | 110/80 |
| Chainline | GRX 47 mm | GRX 47 mm |
| Q Factor | Narrower | Standard GRX |
| Chainring Configuration | 1x or 2x | 1x or 2x |
| Chainring Included | Yes | No (sold separately) |
| Chainring | Aftermarket (power2max/ROTOR) | Shimano GRX |
| Chainring Sizes | 38T, 40T, 42T, 44T, 46T, 46/30T, 48/31T | 40T, 42T, 46/30T, 48/31T |
Professional Assembly (Optional) 
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
Upgraded ROTOR ALDHU Crank Arm Version: We also sell the power2max NGeco ROTOR ALDHU 24MM Power Meter for GRX Chainrings which comes with nicer, but slightly more expensive, ROTOR ALDHU crank arms. The finish on the ALDHU arms is nicer and they are about 40 grams lighter.
(949) 535-3742
Joel Greenbaum (verified owner) –
This power meter crank set combo is the bomb! Switched from a single sided left, crank arm power meter on my Shimano GRX group set with 172.5 mm cranks to this power2max NGeco ROTOR p2m Edition in a 165 crank arm- what a difference! i’m actually putting out an extra 20 W per ride on average, and now that I’ve gone to the shorter cranks I can get down on the drops without my knees banging into my chest. Amazing tech-support from Power Meter City too.