4iiii PRECISION 3+ Left-Side Powermeter - Ride Ready Compatible Left Crank:Shimano - Ultegra FC-R8100 172.5mm you send us your compatible

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

or a cyclist looking to analyze left/right balance to optimize your pedal stroke

Whether you’re prepping for a local Gran Fondo or aiming for a new FTP personal best

or a cyclist simply looking to add the structure of data to your training

The 4iiii PRECISION 3+ Powermeter is the ultimate combination of accuracy

4iiii PRECISION 3+ Left-Side Powermeter - Ride Ready Compatible Left Crank:Shimano - Ultegra FC-R8100 172.5mm you send us your compatibleThe 4iiii PRECISION 3+ Powermeter is the ultimate combination of 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 simply looking to add the structure of data to your training, this crank based power meter provides the consistent data you need to unlock your potential. Engineered to be the best affordable power meter on the market, the