A black 4iiii Ultegra FC8100 Precision 3.0+ Pro Power Meter for bicycles, with dual-sided power measurement crankset and branding visible.

4iiii

4iiii Ultegra FC8100 Precision 3.0+ Pro Power Meter

~~£875.00~~ £825.00 Sale

Pro-level ±1% power accuracy with long battery life and seamless Apple Find My support — elite insights for every ride.

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Take your cycling performance to the next level with the 4iiii Ultegra FC8100 Precision 3.0+ Pro Power Meter. Engineered for accuracy and reliability, this dual-sided power meter delivers real-time performance insights to help you optimise every ride. Whether you're pushing for a personal best or fine-tuning your race-day strategy, the PRECISION 3+ PRO ensures your training is backed by precise data. With the added benefit of Apple Find My integration, you'll always have peace of mind knowing your power meter’s location.

Equipped with advanced metrics such as left/right balance, pedal smoothness, and torque effectiveness, this power meter provides deeper insights into your pedalling efficiency. The automatic terrain selector adapts your data output to match changing conditions, ensuring accurate readings no matter where you ride. With up to 550 hours of battery life and ±1% accuracy, it’s built for endurance and reliability. Whether you're training indoors or tackling the toughest road climbs, the PRECISION 3+ PRO is the perfect companion.

Designed to integrate seamlessly with Shimano’s Ultegra FC8100 crankset, this power meter offers dual ANT+ and Bluetooth connectivity, making it compatible with a wide range of cycling computers and apps. With firmware updates available wirelessly via the 4iiii app, you’ll always have access to the latest performance enhancements. Backed by a 3-year industry-leading warranty, the PRECISION 3+ PRO is built for long-term success on the road.

Key Benefits

Dual-sided power measurement for balanced and precise performance tracking
Left/right balance, pedal smoothness & torque effectiveness for deeper analysis
±1% accuracy for professional-level data reliability
Up to 550 hours of battery life for long-lasting performance
Apple Find My integration to track your power meter's location
Automatic terrain selector for optimised data in varied conditions
Wireless firmware updates via the 4iiii app
ANT+ & Bluetooth connectivity for seamless pairing with cycling computers and apps
Designed for Shimano Ultegra FC8100 cranksets
3-year industry-leading warranty for peace of mind

Product Specifications

Accuracy: ±1%
Battery Life: Up to 550 hours
Battery Type: CR2032 coin cell (user-replaceable)
Connectivity: ANT+ and Bluetooth
Power Measurement: Dual-sided (left & right)
Metrics: Left/right balance, pedal smoothness, torque effectiveness
Compatibility: Shimano Ultegra FC8100 crankset
Firmware Updates: Wireless updates via 4iiii app
Device Integration: Compatible with Apple Find My
Weight: Adds only 20g to crankset
Water Resistance: IPX7 (submersible up to 1 metre)
Mounting: Factory-installed on Shimano Ultegra FC8100 crank arms
Operating Temperature: -20°C to +50°C
Warranty: 3-year industry-leading warranty

Why We Choose 4iiii

We choose 4iiii because they’re at the forefront of cycling innovation, delivering world-class power meters and performance technology trusted by both pro teams and everyday riders. Their mission aligns with ours: making advanced training tools accessible, accurate, and reliable for all athletes.

Proven Accuracy – +/-1% precision power measurement for trusted performance data.
Innovation-Driven – Pioneers in lightweight, compact power meter design.
Ride Ready – Durable, weatherproof tech built for real-world cycling conditions.
Trusted by Professionals – Used by elite WorldTour cycling teams worldwide.

That’s why 4iiii is part of the North Sports collection — giving riders the tools they need to train smarter, push harder, and achieve their goals.