Raceface CHESTER Alloy Seatpost 30.9 X 325mm BlackThe Chester seatpost is burly, durable and always down to ride just like you. Through rock gardens, bike park sessions, and more than your fair share of bails and close calls, a Chester post will serve you well. Material: lightweight carbon fiber Diameter: 27. 2, 30. 9, 31. 6mm Total length: 300, 350, 400mm (including 100mm of minimum insert) Offset: 15mm Saddle clamp: standard rails Saddle clamp torque: 15Nm (max) Seat collar torque: 6Nm (max) 7Nm