4iiii PRECISION 3+ Left-Side Powermeter - Factory Install Compatible Left Crank:Shimano - Ultegra FC-R8000 it is built to withstand

it is built to withstand the elements and your highest-intensity efforts

With 540+ hours of battery life and an IPX7 waterproof rating

BONUS: FREE TRAINING WITH JOIN CYCLING Every 4iiii power meter purchase includes 8 weeks of free premium training on the JOIN Cycling App

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

The Viiiiva is a reliable cornerstone of your training toolkit

4iiii PRECISION 3+ Left-Side Powermeter - Factory Install Compatible Left Crank:Shimano - Ultegra FC-R8000 it is built to withstandThe 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