Seatpost

A "plain" seatpost (silver) connects the saddle to the frame (red).
A microadjust seatpost (black) of a Trek Fuel 80 mountain bike.
A seatpost with a significant setback on a BMX bike.

A bicycle seatpost,[1] seatpin,[2] saddlepole,[3] saddle pillar,[4] or saddle pin[5] is a tube that extends upwards from the bicycle frame to the saddle. The amount that it extends out of the frame can usually be adjusted, and there is usually a mark that indicates the minimum insertion (or maximum extension). Seatposts can be made of steel, aluminum, titanium, carbon fiber, or aluminum wrapped in carbon fiber.[6]

  1. ^ Brown, Sheldon. "Glossary: Seatpost". Sheldon Brown. Retrieved 2009-08-02.
  2. ^ Brown, Sheldon. "Glossary: Seat Pin". Sheldon Brown. Retrieved 2010-07-25.
  3. ^ "2010 WEIHAI ITU LONG DISTANCE TRIATHLON WORLD SERIES" (PDF). International Triathlon Union (ITU) / China Triathlon Sports Association (CTSA). Retrieved 2010-07-25. One(1) bike number, to be attached to the saddle pole.
  4. ^ Oxford English Dictionary (2nd ed.). 1989. saddle pillar n. Motorcycling and Cycling the pin extending from a cycle saddle which fits into a socket on the cycle frame.
  5. ^ Oxford English Dictionary (2nd ed.). 1989. saddle pin n. (a) any of various pins which fit into a saddle (in various senses) or resemble a saddle in shape (rare); (b) Motorcycling and Cycling = saddle pillar n.
  6. ^ "Felt 6061 T6 Carbon Seatpost". Retrieved 2009-01-26.