The shimano m520 spd mountain bike pedals is designed for off road riding these pedals feature an open binding mechanism which sheds mud quickly and easily they feature lightweight aluminium bodies and sealed bearings for super smooth running durability and low maintenance the shimano m520 spd mountain bike pedals are great value real spd pedals that benefit from shimano39s trickle down technology practice using the design and cleats from the much loved older and dearer 959 pedal