Shorter cranks reduce the distance your foot travels to make a single revolution. Imagining the circle your foot must draw ...

But it is possible to go too short, as illustrated in a video from The Lost Co., in which they test out some extreme crank lengths in the Whistler Bike Park. The Era cranks will retail for $499 ...

If leverage won bike races, we'd all be riding 400mm cranks—debunking myths and optimizing crank arm length for peak performance.