Work for Bike with 9/16'' Thread Crank, Compatible with SHIMANO SPD system. Made of Premium Material. CR-MO Steel, DU Spindle and Bearings allow you to have a very smooth click in and release, keeping your riding journey comfortable all the way. Long-lasting and Waterproof. Thanks to sealed bearing, high class forged steel body and anodic oxidation treatment, our pedals without a doubt that are made for longer service even under the circumstance of riding in the rain. Outstanding Machining. A great set of material is far from enough. The pedals were precisely CNC machined, thus it has a sophisticated shape and design. Only weigh 346g,lighter than PD-M540. Mud-shedding. The open construction in the center of the pedal does not accumulate mud and not interfere with pedal engagement.