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INPEAK POWERCRANK-E TWiN2 Shimano GRX RX820 Power Meter

Power Meter City September 11, 2025

$1,044.99

INPEAK’s dual-sided rechargeable power meter on a Shimano GRX RX820 crankset

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INPEAK POWERCRANK-E TWiN2 Shimano GRX RX820 Power Meter

The INPEAK POWERCRANK-E TWiN2 Shimano GRX RX820 Power Meter is a dual-sided power meter crankset for Shimano 12-speed GRX drivetrains. This is one of the only power meter cranksets that uses a Shimano GRX RX820 crankset to provide you with accurate and reliable dual-sided power data. This INPEAK power meter replaces your current GRX crankset and features two rechargeable sensors. It measures the power generated by both legs independently, with left/right information gathered. Data transmits via ANT+ or Bluetooth Smart, ensuring seamless connectivity with your preferred head unit or training app.

Designed in Poland, INPEAK engineered the POWERCRANK-E TWiN2 sensors to handle whatever the Polish climate threw their way. As a result, the INPEAK POWERCRANK-E TWiN2 is IP67-rated for water and dust resistance. Alongside water and dust protection, it features active temperature compensation from 23°F to 122°F. While the INPEAK can withstand any adventure, it is one of the lightest options available and adds only 20 grams to the crankset. With USB charging there is no more searching for a spare battery, just charge and ride.

 

Product Details

Key Features of the INPEAK POWERCRANK-E TWiN2 GRX Power Meter

  • Robust Durability: The IP67 water and dust sealing and wide operating temp range means training in the snow or desert is not off the cards.
  • Compact Design: The sensors, at only 6 mm thick and 10 grams, fit most frames and add minimal weight.
  • Rechargeable Battery: Gaining a full charge in only 2 hours, the rechargeable Li-Po battery eliminates the disposable coin-cell frustrations.
  • Dual Sided Power Data: With sensors on both crank arms, the INPEAK POWERCRANK-E TWiN2 can measure independent left/right leg power information.

Power Measurement

This INPEAK power meter has a power sensor on both crank arms and measures power from both legs. It is also able to measure your left vs. right leg power.

Compatibility

The INPEAK POWERCRANK-E TWiN2 GRX RX820 Power Meter is compatible with Shimano 12-speed gravel drivetrains and 24 mm bottom brackets. See Compatibility tab for more information.

Considerations

The INPEAK power meter is +/- 2.0% accurate, which is slightly lower than some alternatives. While some riders may want a power meter that is +/- 1.0% accurate, the difference usually amounts to only a few watts.

Advice From Our Staff

We recommend this power meter for riders who want a dual-sided power meter while still using a Shimano GRX RX820 crankset. The POWERCRANK-E TWiN2 GRX is one of the only options for dual-sided, rechargeable power meters that allows you to still use a Shimano crankset. In addition, installation is simple assuming you already have a Shimano 12-speed drivetrain.

 

Options

  • Crank arm lengths: 170 mm | 172.5 mm | 175 mm
  • Chainrings: 40T | 42T | 48/31T

Compatibility

Drivetrain: This INPEAK power meter is compatible with Shimano 12-speed GRX drivetrains.

Bottom Bracket: Works with 24 mm bottom brackets.

Check Frame Clearance: Crank-arm based power meters attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 8 mm of clearance for the INPEAK POWERCRANK. Also, make sure that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below.

If you find that your clearance is close but not quite sufficient, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame). This should provide you with the clearance you need.

A top-down diagram view of the non-driveside of a bicycle showing an 8 mm hex wrench fitting between the bike frame and the crank arm.

INPEAK POWERCRANK-E TWiN2 GRX Specs

NameINPEAK POWERCRANK-E TWiN2 GRX
Bike TypeGravel
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes
InstallationMore involved (60 min. estimated)
Crank Arm MaterialAluminum
Communication ProtocolANT+ and Bluetooth Smart
Claimed Accuracy+/- 2.0%
Automatic Temp. CompensationYes
Weight660 grams (170 mm, 40T)
Battery TypeRechargeable LiPo
Battery Life90 hours
Method of Cadence MeasurementAccelerometer
BCD110/80 4-bolt
Spindle Size24 mm
Q-Factor151 mm
Warranty2 years

In the Box

  • INPEAK POWERCRANK-E TWiN2 Shimano GRX RX820 Power Meter
  • USB charging cable
  • 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.

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