The recessed SPD cleat and clipless pedal technology revolutionized the cycling shoe/pedal interface. Ultimate power transfer and peak performance demand that pedal and shoe work together as one integrated system. Shimano's legacy of Systems Engineering and premier component design provided the model for a totally new shoe/pedal system, and SPD was born. Since then, decades of legendary "in-the-dirt" dependability, reliability and sheer endurance has made SPD the world's "go-to" pedal technology.