Ritchey Comp Carbon Seatpost: 27.2 400mm 25mm Offset Black 2020 ModelRitchey Comp Carbon Seatpost: 27. 2 400mm 25mm Offset Black 2020 Model. Comp Carbon SeatpostLow profile clamp reduces stress on lightweight rails and wont bottom out 2 bolt design securely holds the saddle in place and is easy to adjust TECH SPECS Length 400 Color Black Diameter 27. 2 Material Carbon Defined Color Black Clamp Style Standard Rails Offset (mm) 25