SM-SH51 SPD Cleat Set (Pair) Single Release w/o Cleat NutReplacement cleats for all Shimano SPD clipless pedals, intended for performance off road and pavement riding. These release with a lateral twist and are less likely to release with upward stroke or pull. They feature 4 degrees of float for free movement and less joint stress. Casual riders may prefer SM SH56 multi release cleats which are easier to unclip.