4iiii makes the lightest power meter on the market. We’re committed to helping you get faster, one gram at a time.
A dual power meter measures the power from each individual leg to calculate your total power output.
Not everyone has the perfect pedal stroke. With +/- 1% accuracy, 4iiii is the only crank-based power meter to use 3 strain gauges to measure all forces in your pedal stroke.
Get more data like pedal smoothness and torque effectiveness to analyze and optimize your pedal stroke.
If the weather or climate make riding outdoors tough, your 4iiii power meter can be used with all popular indoor-training apps, such as Zwift, TrainerRoad, Wahoo SYSTM, Rouvy, and more.