Designed to provide you with a better sports’ bicycle experience the PRO Koryak Stem boasts a strong but lightweight 3D forged AL 7075 alloy construction. This makes it ideal for all-mountain, trail and cross-country mountain biking. FEATURES: Alloy all-mountain, trail and cross-country stem 3D forged AL 7075 construction Headlock system for a secure front clamp fixation Shimano Di2 integration SPECS: Clamping diameter: 31.8mm Weight: from 137g