Work for Bike with 9/16'' Thread Crank, Compatible with SHIMANO SPD SL system Low Maintenance. CR-MO Steel made spindle sealed with mental bottom cover ,dust and rain proof, which requires low maintenance Light Weigh Body. Polycarbonate made body,that provides great rigidity to the pedal and also lightweight that helps to save your power. Only weigh 280g Ajdustale Tension. Adjust the entry and release tension according to your needs.Increase the tension clockwise and decrease it vice versa Long-Lasting.With high class forged steel body and anodic oxidation treatment,lightweight and durable.