The PD-M520 is an SPD Pedal Ideal for Enthusiast MTB or Road Cyclists: Classic SPD reliability and performance Well Tested and Trustworthy Design: Compact body design with open binding for easy entry and engagement Excellent Mud Shedding Ability: Binding mechanism design sheds mud and debris for reliable engagement and release in all conditions Customizable Engagement and Release: Adjustable tension settings for smooth and confident clipping in and out Durable and Low Maintenance: Strong chrome-molly spindle and low-maintenance sealed bearing cartridge axle