power2max NGeco ROTOR ALDHU 24MM Power Meter for GRX Chainrings
The power2max NGeco ROTOR ALDHU 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 ALDHU vs. ROTOR p2m Edition
We offer this power meter with both ROTOR ALDHU crank arms (what you are viewing now) and ROTOR power2max Edition crank arms. Both of these crank arms work and fit the same, however ALDHU version has a nicer finish and is about 40 grams lighter. It is also a bit more expensive.
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 ALDHU 24 mm crank arms come in the following crank arm lengths:
- 155 mm | 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 | GRX |
| 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
Budget Friendly p2m Edition Crank Arm Version: We also sell the power2max NGeco ROTOR p2m Edition 24MM Power Meter for GRX Chainrings which comes with more budget friendly crank arms. The finish on the p2m Edition arms is not quite as nice and they are about 40 grams heavier.
(949) 535-3742
Brian Stoner (verified owner) –
I was very apprehensive about purchasing a power meter for my OPEN U.P. gravel bike. The OPEN website has a table showing lots of popular power meter products, but most will not fit because they’re made for road geometry and mine has GRX DI2 with a wider Q-Factor and chainline. It seemed too good to be true to find the NGECO Rotor ALDHU power meter for GRX chainrings. Same exact geometry as stock GRX, but with the ability for me to run my Shimano chainrings to ensure proper shifting. Power Meter City shipped the same day and my installation went perfectly.
So far I am loving having the power meter data! Thank you guys for a really fantastic purchasing experience.
Brian
Power Meter City –
Hi Brian! We’re so happy the NGECO Rotor ALDHU power meter was the perfect match for your OPEN U.P.! It’s awesome that you can use your Shimano chainrings and still get reliable power data. Thanks for trusting us! We’re thrilled to have been part of your setup. If you need anything else, just let us know! Safe rides!
Romeo Sevilla (verified owner) –
Just what I needed to pace Tadej Pogacar lol
Power Meter City –
Cool! Thank you, Romeo! We are here if there is anything else we can help you with!
David Chan (verified owner) –
Works perfectly!
Power Meter City –
Thank you, David! We really appreciate this! Ride safe!