The ultimate goal of Shimano's SPD-SL pedal technology is to transfer more power from the body directly to the bike. Inspired by a Tour de France legend and realized through the legacy of Shimano Systems Engineering, SPD-SL integrates the shoe and pedal so they perform as a single ultra-efficient component. The extra-wide low-profile cleat and binding mechanism creates a highly stable interface between the shoe and pedal, in a super lightweight design. No wasted movement. No loss to flex, voids or mismatched shoe/pedal designs. It's why so many Pro Tour and serious riders use SPD-SL.