Optimum concave shaped flat pedalThe pedal surface helps your foot to be positioned on the pedal and generates additional grip. The noticeable negative curvature of the pedal surface literally gives you the feeling of standing "in" instead of "on" the pedal. You just have to try it to understand the feeling!The pedal comes with an assembly tool and five spare pins.Safety note:Unless otherwise specified by the crank manufacturer, make sure that the pedals are tightened to min. 37 to max. 42 Nm.- Affordable, reliable 20mm thick aluminum platform pedal - Cup/cone ball bearing mechanism - 10 steel pins per side, plus diamond surface for additional support - Includes five replacement pins and tool - 100x95mm (width x length)