The 4iiii Shimano R8100 Precision 3+ Powermeter (Left Crank) is the ultimate tool for cyclists seeking precision, reliability, and advanced technology in their training. Engineered for both professionals and weekend warriors, this powermeter features a compact, lightweight design, integrated Apple Find My support, and up to 800 hours of battery life. Its accuracy of +/-1% and Automatic Terrain Selector ensure you get the most accurate data no matter the conditions. Compatible with popular indoor training apps, this powermeter is versatile and robust, ready to handle any riding environment.

Features

• Compact and Lightweight: Weighs only 9 grams, designed for minimal impact on your ride.
• High Accuracy: Provides +/-1% accuracy with 3 strain gauges to measure all forces in your pedal stroke.
• Battery Life: Up to 800 hours of battery life with a CR2032 coin cell battery.
• Apple Find My Support: Enables location tracking of your powermeter using the Find My app on Apple devices.
• Automatic Terrain Selector: Adjusts power and cadence feedback based on terrain for more responsive data.
• Waterproof: IPX7 rating ensures durability in all weather conditions.
• Ergonomic Design: Low profile design enhances compatibility with various bike frames.
• Easy Installation: Pre-installed on a Shimano crank arm for quick setup.
• Advanced Connectivity: Supports ANT+ and Bluetooth Smart for seamless integration with head units and training apps.
• Durability: Backed by a 3-year warranty and designed to withstand the toughest riding conditions.

Specifications

Additional Information

How Does It Work?

The PRECISION 3+ Powermeter is more than just a power meter; it's your training partner. It transmits watts, cadence, and calories to your head unit while you ride. When not in use, it can be tracked via Apple Find My, allowing you to locate it using an iPhone, iPad, Mac, or Apple Watch.

In the Box

Your ride-ready PRECISION 3+ Powermeter comes pre-installed on a Shimano crank arm. Simply install it on your bike using the standard Shimano crank installation process, connect to a head unit or computer, and start riding with power. Connect to the Find My app for tracking.

Warranty & Durability

Designed to endure the toughest conditions, the 4iiii powermeter is IPX7-rated and backed by an industry-leading 3-year warranty. Tested in various harsh environments, it guarantees reliability and performance.

Indoor Training Compatibility

Perfect for indoor training, the 4iiii powermeter is compatible with popular apps like Zwift, TrainerRoad, Wahoo SYSTM, and Rouvy. Use ANT+ or Bluetooth Smart to connect and start your indoor sessions.

Learn More: Why Train With Power?

Training with power provides precise data to help you monitor and improve your performance. It allows for consistent tracking of progress and enables more effective training sessions, whether you're aiming for a personal best or competing in professional races.