Based on XTR-M959 pedal design (replaces PD-M536 model). Dual-sided clipless engagement bindings. Adjustable cleat tension with indicator (Uses SH51-SR-SH55-MR cleats). Open design clears mud-debris for consistent clip-in action. Nylon-resin axle locknut with 15mm wrench flats for install-removal. CrMo spindle with a sealed, ball-bearing design. Painted black body with silver bindings