PD-GR500 Flat Platform Trail, MTB, Downhill Bike PedalThe Shimano PD GR500 pedals are a tough flat pedal for trail, all mountain, endura or downhill riding. It has height adjustable pins and is built around a sealed cartridge bearing and chromoly axles. These pedals are low maintenance and long life. FEATURES Concave platform for better grip, long ride comfort, and efficiency Height adjustable, bottom loading replaceable pins Chrome moly spindle and low maintenance, sealed bearing cartridge axle