4iiii PRECISION 3+ PRO Dual-Sided Powermeter - Ride Ready Crankset:Shimano - Ultegra FC-R8100 165mm (50/34T) Backed by our 3-year warranty

Backed by our 3-year warranty and an IPX7 waterproof rating

screws and O-ring

this dual-sided crank based power meter provides the comprehensive data you need to unlock your potential

This Ride Ready unit comes pre-installed on a brand-new Shimano crankset

you send us your compatible drive-side crank arm and we install the PRECISION 3+ PRO Powermeter to complete your dual-sided system

4iiii PRECISION 3+ PRO Dual-Sided Powermeter - Ride Ready Crankset:Shimano - Ultegra FC-R8100 165mm (50/34T) Backed by our 3-year warrantyThe 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