Get some Shimano magic under your dogs and feel the difference. A super light and strong resin body with a chromoly spindle, adjustable release, and wide platform gives you the perfect balance of performance and ease of use. Wide lightweight resin body provides large shoe contact area to maximize power transfer and support Low maintenance sealed cartridge axle unit. The low profile platform with open design allows for easy access and cleat adjustments. Easy to clip into and release but with stable fit for maximum power transfer to the pedals Wider cleat and binding mechanism for better shoe/pedal contact than traditional SPD systems.