4iiii
4iiii (pronounced "forth-eye") builds low-profile, lightweight crank-based power meters designed to add minimal bulk and weight to your existing crankset while delivering precise power data. What makes 4iiii power meters lightweight and low-profile? 4iiii designs its power meter pods to sit flush against the crank arm with a compact, aerodynamic housing, adding only a small amount of weight compared to bulkier competing power meter designs. Can 4iiii power meters be factory-installed on a new crankset? Yes, 4iiii offers both aftermarket power meter pods that attach to your existing crank and factory-integrated options pre-installed on select cranksets from partner brands.