Collection: 4iiii Power Meters & Cranks

Train with purpose using 4iiii crank-based power meters for road, gravel and mountain biking. Explore PRECISION left-side and PRECISION PRO dual-side options built around Shimano Dura-Ace, Ultegra, 105, GRX, XT and XTR crank platforms.

Compare the crank model, crank length and frame-clearance requirements before choosing your power meter. You'll also find 4iiii replacement parts and training accessories to support your setup.