Road Pedals are predominantly clipless, different manufacturers take alternative design routes which allow varying amounts of foot movement (float) to be built into the pedal and cleat. While Look, Time and Shimano have spring tension mechanism built into the pedal body, Speedplay have the spring mechanism built into the cleat. Shoe cleats, or plates, wear down over time, when worn they can cause the cleat to come out of the pedal when you are not expecting it, they can also cause problems with your knees. Merlin stock pedals and cleats from the world’s leading manufacturers including Look, Shimano, Time and Speedplay.