Shimano XTR M9100 SPD Pedal - 3mm Short 52mm Wider edge-to-edge contact area provides solid pedal – shoe interface and transmits power efficiently Cylindrical contact area sheds mud better for consistent stepping-in & out 2 axle length options Crank surface - Pedal center: 52mm, 55mm Efficient pedaling and better bike control Better mud clearance Stress-free pedaling Improved axle durability Pedal Axle Material: Chromoly steel Pedal Body Material: Aluminum 1.0mm cleat spacer included Includes SM-SH51 cleats Weight: 310g. (short axle); 314g. (standard axle) Color: black