More informationExtruded Alloy Extensions and Forged Alloy Clamp; Fits 31.8mm or 26.0mm clamp diameter (including wedge); Streamlined internal cable routing; 65mm height pads leave enough clearance for hand placement when used on road handlebars; Aerodynamic shape with S-curve optimized in the wind tunnel; Compatible with standard 22.2mm carbon and aluminum extensions;