What Is the Shimano SM-SH51 SPD Single-Release Cleat Set?

The Shimano SM-SH51 is the SPD single-release cleat set, requiring a deliberate lateral heel-out twist to exit the pedal. Single-release provides a more locked-in, secure engagement than multi-release SM-SH56 cleats -- the preferred choice for performance road cyclists, time trialists, gravel racers, and experienced clipless riders who want to eliminate any chance of accidental release during high-effort pedaling. The secure engagement is well-suited to road shoes, gravel shoes, and fitness footwear where pedaling efficiency takes priority over ease of foot placement. Includes cleat nuts for direct installation on any SPD-compatible shoe sole.

Compatible with all Shimano SPD two-bolt cleat pedals. Sold as a pair with cleat nuts included. For riders who prefer secure engagement over the easier multi-directional exit of SM-SH56.