RSP Beanpole - Carbon Inline Seat Post - 30.9mm - 350mmRSP Beanpole Carbon Inline Seat Post 30. 9mm A surprisingly affordable carbon seatpost, the RSP Beanpole Inline has an in line clamp that holds your saddle directly above the shaft of the post. Inline dual bolt saddle clamp Lightweight carbon shaft Saddle adjustment: 5 to + 18 degree Length: 350mm Diameter: 30. 9mm Colour: black Weight: 270g (31. 6mm)