My message Close
4iiii is a Canadian pioneer in cycling tech, born from Dynastream’s ANT+ legacy, with a mission to democratize elite-grade power measurement.
What sets 4iiii apart is its ultra‑lightweight, affordable precision power meters—with battery life up to 800 hours and Apple FindMy support—and exceptional ±1% accuracy for both single‑ and dual‑leg power. We recommend them for riders seeking high performance without premium prices. The brand offers a full range: Shimano crank‑arm swap options, complete cranksets, and complementary apps and accessories. Whether you’re a pro athlete or weekend warrior, 4iiii delivers proven reliability, real‑world accuracy, and seamless compatibility across ANT+ and Bluetooth platforms.