FSA V-Drive SB0 Seatpost 27.2x400mm BlackThe FSA V-Drive SB0 Seatpost is 3D forged and CNC machined, this time from 6061 aluminum. It features the same two-bolt Minimal Top Clamp as our more expensive posts, with zero setback. The hardware is chromoly and fits 7mm standard rails and 7x9mm oval rails. Weighs about 270g. Available in 27.2x350mm, 31.6x400mm,27.2x400mm, and 30.9x400mm.840031054005