The 4iiii PRECISION 3+ PRO Powermeter is our most advanced power meter, offering the ultimate combination of dual-sided accuracy, durability, and lightweight design. Whether you are a Tour de France pro, a Mountain Bike World Champion, Ironman triathlete, a Zwift racer, or a cyclist looking to analyze left/right balance to optimize your pedal stroke, this dual-sided crank based power meter provides the comprehensive data you need to unlock your potential.

Elevate your riding experience with dual-sided power for our most advanced features and an in-depth look at your data. With left/right balance, pedal smoothness, and torque effectiveness, the PRECISION 3+ PRO Powermeter provides the most detailed insight into your riding. Built to handle everything from rough terrain and gravel to high RPM sprints, it features Apple Find My technology, automatic terrain selection, and an industry-leading 550-hour battery life.

With the Factory Install Dual Upgrade, you send us your compatible drive-side crank arm and we install the PRECISION 3+ PRO Powermeter to complete your dual-sided system. Note: If your current left-side power meter is a PRECISION 3 (non-Find My), please include it with your drive-side crank so we can ensure both sides are synced and updated to the latest technology.

BONUS: FREE TRAINING WITH JOIN CYCLING Every 4iiii power meter purchase includes 8 weeks of free premium training on the JOIN Cycling App. Whether you’re prepping for a local Gran Fondo or aiming for a new FTP personal best, JOIN provides flexible, adaptive training plans that sync perfectly with your new PRECISION 3+ data.