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Product Details
INPEAK Ultegra R8100 Rechargeable Power Meter Crank Arm
The Ultegra R8100 Rechargeable Power Meter Crank Arm is the latest evolution of the INPEAK power meter range, created with modern performance needs in mind. Using the proven POWERCRANK E measuring system, it introduces a rechargeable battery that is easily powered via the included magnetic USB cable. More than a measurement tool, it supports riders in reaching a higher level of training and performance.
INPEAK Advanced Connectivity
The POWERCRANK E system uses both ANT plus and BLE transmission protocols to deliver power, cadence and a wide range of detailed cycling performance metrics to compatible devices. Purpose built for road and gravel bikes, the low profile housing is waterproof and highly durable, ensuring reliability in varied riding environments.
INPEAK Consistent Accuracy
Precision is maintained in all conditions thanks to ATC automatic temperature compensation, which keeps readings accurate from minus five to fifty degrees Celsius. The rechargeable system provides an efficient, modern solution for riders looking for dependable and repeatable power data.
In The Box
- Crank Arm with integrated power meter
- USB charging cable
- Instruction manual
- Sticker set
- Device data card
Features
- Measurement Precision: ±2%
- Power Measurement Range: 20–2000 W
- Cadence Range: 20–200 rpm
- Weight: 10 g (INPEAK device)
- Case Tightness: IP67
- Manual Zero Offset Calibration: Yes
- Temperature Compensation: Yes
- Gyroscope + Accelerometer: Yes
- Torque Effectiveness: Yes
- Pedal Smoothness: Yes
- Cycling Dynamics: Yes (TWiN2)
- Balance L/R: Yes (TWiN2)
- Operating Temperature: -5°C to +50°C
- Storage Temperature: -20°C to +50°C
- Battery Type: Li-Po, rechargeable
- Battery Capacity: 110 mAh
- Battery Autonomy in Use: Maximum 90 hours
- Battery Autonomy in Sleep: Maximum 6 months
- Battery Autonomy in Ship Mode: Maximum 24 months
- Charging Time (0%–100%): 2 hours
- Low Battery Notification: Yes
- Battery Charging Temperature: +5°C to +40°C
- Battery Lifetime: Less than 20% capacity loss after 300 full cycles, approximately 6-year lifetime
- Required Charger: 5VDC, 1000 mA (not included)
- Software Update from INPEAK Manager App: Yes
- Modification of Scale Factor: Yes
- Zwift Compatible Mode: Yes
- ANT+ Compatibility: Yes
- Bluetooth Low Energy Compatibility: Yes
- Auto Sleep: Yes
- Auto Wake-Up: Yes
Specifications
- Compatibility (Device / Platform)
- ANT+, Bluetooth
- Connectivity Type
- ANT+, Bluetooth
- Power Source Type
- Rechargeable Battery
- Primary Product Type (Electronics)
- Power Meter
- Water Resistance Rating
- IPX7
- Accuracy Rating (%)
- 2 %
- Battery Life (Typical Use, Hours)
- 90 hrs
- Battery Type (Power Meter)
- Rechargeable
- Cadence Measurement
- Built-in
- Charging Interface
- Proprietary
- Discipline Compatibility
- Road
- Display Type
- No Display
- Firmware Upgradable
- Yes
- Maximum Measurable Power (W)
- 2000 W
- Measurement Position
- Crank Arm
- Measures Left / Right Balance
- Yes
- Mounting Location
- Crank Arm
- Weight (g)
- 10 g
- Product code
- 1986639 / 54293461631322
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Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
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