
thumb|right|A "plain" seatpost (silver) connects the Bicycle saddle|saddle to the frame (red). thumb|right|A microadjust seatpost (black) of a Trek Fuel 80 mountain bike. thumb|right|A seatpost with a significant setback on a BMX bike. A bicycle seatpost, seatpin, saddlepole, saddle pillar, or saddle pin 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, o
thumb|right|A "plain" seatpost (silver) connects the Bicycle saddle|saddle to the frame (red). thumb|right|A microadjust seatpost (black) of a Trek Fuel 80 mountain bike. thumb|right|A seatpost with a significant setback on a BMX bike. A bicycle seatpost, seatpin, saddlepole, saddle pillar, or saddle pin 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.
==Attachment points==
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).