INPEAK POWERCRANK-E Shimano GRX RX820 Power Meter

INPEAK POWERCRANK-E Shimano GRX RX820 Power Meter

The INPEAK POWERCRANK-E Shimano GRX RX820 Power Meter is a power meter crank arm for Shimano GRX RX820 and RX810 cranksets. This INPEAK replaces your non-drive side crank arm. It measures the power generated by your left leg and doubles it to determine your total watts. Data transmits via ANT+ or Bluetooth Smart, ensuring seamless connectivity with your preferred head unit or training app. It features a rechargeable and offers 90 hours of battery life.

Designed in Poland, INPEAK made the POWERCRANK sensor to handle whatever the Polish climate threw their way. As a result, the INPEAK RX820 power meter is IP67-rated for water and dust resistance. Alongside water and dust protection, it has active temperature compensation from 23°F to 122°F. In addition, it is one of the lightest options available as it adds only 10 grams to the crank arm. Rain or shine, the INPEAK Shimano RX820 Power Meter will dutifully record your stats ride after ride. 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 RX820 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: Only 6 mm thick and 10 grams means the sensor fits most frames and adds minimal weight.
• Rechargeable Battery: Gaining a full charge in only 2 hours, the rechargeable Li-Po battery eliminates the disposable coin-cell frustrations.
• Data Multiple Ways: ANT+ and Bluetooth Smart connects to head units such as a Garmin Edge and a variety of training apps such as Zwift.

Power Measurement

This INPEAK power meter measures left leg power and doubles the value to account for both legs (assumes both legs are generating the same force).

Compatibility

This power meter is compatible with Shimano GRX RX820 and RX810 cranksets. See Compatibility tab for more information.

Considerations

The INPEAK POWERCRANK-E RX820 Power Meter measures power only from your left leg. This means total power is estimated by doubling the left leg’s output. While this works well for many riders it may be less accurate if there is a strength difference between your legs. This is common with single-sided power meters and worth considering if precise total power is your priority. In addition, the +/- 2.0% measurement accuracy is less than other options, although for many riders this is only a few watts in either direction.

Advice From Our Staff

We believe this power meter is great for riders who want reliable power data without replacing their entire crankset or using power meter pedals. If you ride in tough conditions, this power meter crank arm provides peace of mind with reliability in harsh weather. Not only is this power meter easy to install on Shimano GRX cranksets, but it is very lightweight and is one of the only power meter crank arms that is rechargeable.

Options

Crank arm lengths: 170 mm | 172.5 mm | 175 mm

INPEAK Shimano GRX RX820 Power Meter Comparison

Other Versions to Consider

INPEAK POWERCRANK R7100 Power Meter: If you are looking for a similar power meter that uses a coin cell battery, we offer the INPEAK POWERCRANK R7100 Power Meter.