Dual-sided chainset power meter
INPEAK TWiN2 GRX RX820 Dual Power Meter Chainset
A Shimano GRX RX820 gravel chainset with INPEAK power sensors on both cranks, for separate left and right readings off-road. Rechargeable, sealed to IP67 and built on GRX's wider chainline for big tyres.
Highlights
Why we rate it
Both legs measured
Separate sensors on each crank report true left/right balance rather than doubling one side.
Complete chainset
Arrives as a full Shimano GRX chainset with the meters fitted, ready to install on a Hollowtech II bottom bracket.
Rechargeable
Magnetic USB charging, around 90 hours per charge and a full top-up in roughly two hours.
Open connectivity
ANT+ and Bluetooth broadcast for head units, watches and indoor training apps.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Compatibility
- Shimano GRX FC-RX820 12-speed chainset (Hollowtech II, 24 mm axle)
- Measurement
- Dual-sided (left and right) TWiN2; power, cadence, L/R balance, pedal smoothness, torque effectiveness
- Q-factor
- 151 mm
- Chainline
- 49.7 mm (GRX gravel chainline)
- Frame clearance
- At least 8 mm between crank arm and chainstay
- Front derailleur
- 2x version requires a GRX front derailleur
- Accuracy
- ±2%
- Power range
- 20–2000 W
- Cadence range
- 20–200 rpm
- Connectivity
- ANT+ and Bluetooth Low Energy
- Water resistance
- IP67
- Temperature compensation
- Automatic, -5°C to +50°C operating range
- Calibration
- Manual zero offset
- Battery
- Rechargeable Li-Po, magnetic USB charging
- Battery life
- Up to 90 hours riding; full charge in about 2 hours
- App
- INPEAK MANAGER for firmware updates and scale factor; Zwift-compatible mode
In the box
- Includes
- Shimano chainset with left and right power meters fitted, magnetic USB charging cable, device data card, sticker set, quick-start manual (USB wall charger not included)
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.