Keep your Shimano GRX chainrings and add power: the NG G-X is designed around GRX rings and comes with the extended 24mm axle it needs.

Highlights

  • Designed for Shimano GRX chainrings (110 BCD)
  • Extended 24mm axle included; Hollowtech II bottom brackets
  • Needs Rotor p2m Edition, ALDHU24 or VEGAST24 crank arms
  • ±1% accuracy; L/R balance and pedal smoothness
  • ANT+ and Bluetooth

What you need

Because of the GRX crankset design, the G-X is a system: the NG G-X power meter and extended 24mm axle are included; ROTOR p2m Edition, Rotor ALDHU24 or Rotor VEGAST24 crank arms and Shimano GRX chainrings are not included.

Rechargeable and precise

The NG measures at the spider with ±1% accuracy and adds left/right balance and pedal smoothness to power and cadence. Active temperature compensation and automatic zero-point adjustment mean no manual calibration, and the rechargeable battery runs up to 150 hours per charge.

Compatibility & fit

Designed for Shimano GRX chainrings (110 BCD) and a 24mm axle, compatible with Shimano Hollowtech II bottom brackets. Requires ROTOR p2m Edition, Rotor ALDHU24 or Rotor VEGAST24 crank arms (not included) and Shimano GRX chainrings (not included). Our workshop can fit the power meter to your crankset and pair it with your head unit as a separate service, not included in the price.

power2max covers NG power meters with a 2-year manufacturer's warranty. For warranty support, return the product to Tune Cycles and we'll manage the claim with power2max's Australian distributor.

  • Designed for Shimano GRX chainrings (110 BCD)
  • Extended 24mm axle included; Hollowtech II bottom brackets
  • Needs Rotor p2m Edition, ALDHU24 or VEGAST24 crank arms
  • ±1% accuracy; L/R balance and pedal smoothness
  • ANT+ and Bluetooth
DisciplineGravel
ChainringsShimano GRX (110 BCD), not included
AxleExtended 24mm, included
Bottom bracketShimano Hollowtech II (24mm)
Crank armsROTOR p2m Edition, ALDHU24 or VEGAST24, not included
MeasurementTotal power from both legs (spider-based)
Accuracy±1%
MetricsPower, cadence, left/right balance, pedal smoothness
Power range10–2999 W
Torque range0–250 Nm
Cadence range20–250 rpm
BatteryRechargeable lithium-ion
Battery lifeUp to 150 hours per charge
ConnectivityANT+, Bluetooth Low Energy
Temperature compensationActive
CalibrationAutomatic zero-point adjustment
Water resistantYes
FitmentLoctite 243 or similar threadlocker recommended
In the boxPower meter, magnetic battery charging cable, battery cap, extended 24mm crank axle, quick-start guide
SKU FES-LM-NGG-ROTDM-002.GRX0
Brand Power2Max

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