Seatposts connect the frame and saddle. All seatposts allow fine tuning, both in terms of height and ‘fore and aft’ position of saddle. MTB seatposts include dropper models which can adjust saddle height without the need to stop. When choosing a seatpost make sure that the post will fit your frame seat tube diameter. Merlin stocks all the major seatpost manufacturers including Thompson, Raceface, Easton, Deda, FSA and Ritchey. Make sure your new seatpost has anti seize or carbon paste smeared on to it before it gets to go inside your frame.