Ritchey Comp Carbon Zero SeatpostRitchey: The redesigned Zero 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. Material: carbon fiber Diameter: 27. 2, 30. 9, 31. 6mm Total length: 400mm (including 100mm of minimum insert) Offset: zero Saddle clamp: 2 bolt fore aft Saddle clamp torque: 7Nm (max) Seat