4III Ultegra R8100 Precision 3+ Dual Sided Power Meter delivers detailed performance data for riders who want deeper insight into every ride. Dual sided measurement tracks power from both legs, giving a clearer picture of pedalling efficiency and overall output.Accurate power readings with +/-1% precision allow reliable training data for structured sessions, racing preparation or performance tracking. Advanced metrics such as left and right balance, pedal smoothness and torque effectiveness provide valuable information that helps riders analyse pedalling technique and maintain consistent effort.4III Ultegra R8100 Precision 3+ Dual Sided Power Meter also supports Apple Find My, allowing the power meter to appear on a map when paired with an iPhone, iPad, Mac or Apple Watch. Riders gain added security and peace of mind when the bike is not in use.Battery life of up to 550 hours keeps the system ready for long training blocks, while automatic terrain selection maintains reliable readings across different road conditions. Installation follows the standard Shimano crank process, allowing riders to connect a head unit and begin recording power data quickly.4III Ultegra R8100 Precision 3+ Dual Sided Power Meter combines precision measurement, advanced metrics and long battery life in a powerful training tool for serious cyclists.- Dual sided power measurement with +/-1% accuracy- Tracks left and right balance, pedal smoothness and torque effectiveness- Transmits watts, cadence and calorie data to compatible head units- Apple Find My support for location tracking- Up to 550 hours of battery life for extended training use- 52-36T Chainrings

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