2012 Ritchey WCS Seatpost 31.6 x 400mm One-bolt Matte Black One piece 3D-Net forged TR741 alloy construction Patented SideBinder clamp design uses a single 5mm bolt for quick, secure adjustment Precision forged alloy clamp assembly for strength Low-profile head for optimal saddle clearance and sleek lines Wide saddle clamp reduces stress on lightweight saddle rails Interchangeable clamps provide compatibility for all popular rail sizes 25mm offset 195 grams