The Trail post offers no-slip saddle engagement and high adjustability by securing the rails with fore and aft bolts. Whether you're hitting rough singletrack or remounting in a hurry, this ensures the saddle stays exactly where you want it.3D Forged 2014 AlloyFore/aft adjustment bolts for precision adjustment and secure clampingItem SpecificationsClamp StyleStandard RailsColorBlatteDefined ColorBlackDiameter30.9Length400MaterialAluminumOffset (mm)0 Ritchey WCS Trail Zero Seatpost Seatpost UPC: 796941416665