The INPEAK TWiN2 Ultegra R8100 USB Power Meter – Dual-Sided, Rechargeable, ±2% Accuracy

Train smarter with the INPEAK TWiN2 Ultegra R8100 USB Power Meter, a dual-sided power meter fully integrated into the Shimano Ultegra FC-R8100 crankset. Built for serious cyclists who demand precision, this redesigned POWERCRANK-E TWiN2 features additional strain gauges for enhanced accuracy and real-time performance data.

Equipped with ANT+ and Bluetooth Low Energy (BLE) connectivity, the TWiN2 seamlessly transmits power, cadence, torque effectiveness, pedal smoothness, left/right balance, and advanced cycling dynamics to your head unit or smartphone. Its automatic temperature compensation (ATC) ensures reliable readings from -5°C to +50°C, making it perfect for all-weather road and gravel riding.

The rechargeable Li-Po battery delivers up to 90 hours of ride time on a single 2-hour charge via the included magnetic USB cable. With IP67 waterproof rating, gyroscope + accelerometer support, and individual calibration for each unit, the TWiN2 combines durability, precision, and value—crafted in Poland for riders who refuse to compromise.

Key Features:

• Dual-sided power measurement with ±2% accuracy
• Integrated Shimano Ultegra FC-R8100 crankset
• USB rechargeable battery (90h runtime, 6-month sleep mode)
• ANT+ & BLE compatible – works with Zwift and major cycling apps
• Auto temperature compensation (-5°C to +50°C)
• Advanced metrics: L/R balance, torque effectiveness, pedal smoothness
• IP67 waterproof, 10g device weight, 20–2000W power range

Software Features & App Support

Manage, update, and customize your power meter with the INPEAK MANAGER App:

• Firmware updates – Keep your device current with the latest performance enhancements
• Scale Factor adjustment – Fine-tune calibration for your specific setup
• Zwift Compatible Mode – Ride virtual courses with accurate, real-time power
• ANT+ & BLE connectivity – Pair with any compatible head unit or smartphone
• Auto sleep / auto wake-up – Saves battery when not in use
• Low battery alerts – Never get caught mid-ride without warning

All software features are designed for seamless integration into your existing training ecosystem—whether you ride outdoors or indoors on Zwift.

Full Technical Specifications

Power Measurement

• Type: Dual-sided strain gauge (TWiN2)
• Accuracy: ±2%
• Range: 20–2000 W
• Cadence: 20–200 rpm
• Metrics: Power (L/R), cadence, torque effectiveness, pedal smoothness, cycling dynamics

Battery & Charging

• Type: Rechargeable Li-Po (110 mAh)
• Runtime: Up to 90 hours
• Sleep mode: 6 months | ShipMode: 24 months
• Charge time: 2 hours (0–100%) via magnetic USB
• Battery life: <20% loss after 300 cycles (~6 years)

Durability & Environment

• Waterproof rating: IP67
• Operating temp: -5°C to +50°C
• Storage temp: -20°C to +50°C
• Weight: 10g (INPEAK device only)

Connectivity & Compatibility

• Wireless: ANT+ & Bluetooth Low Energy (BLE)
• Apps: INPEAK MANAGER, Zwift, Garmin, Wahoo, TrainerRoad, etc.
• Features: Gyroscope + accelerometer, manual zero-offset, auto temp compensation

What’s in the Box?

Every INPEAK TWiN2 Ultegra R8100 package includes:

• 1x Shimano Ultegra FC-R8100 crankset with integrated INPEAK TWiN2 power meter
• 1x Magnetic USB charging cable
• 1x User manual / quick start guide

Ideal for competitive cyclists, coaches, and data-driven trainers seeking a high-accuracy, affordable dual-sided power meter without the premium price tag.