Definitions for "Seat tube"
Keywords:  bike, post, bicycle, saddle, frame
the part of the frame that accepts the seat post, and attaches the top tube to the bottom bracket
The Seat Tube is a tube in the bike frame which accepts the Seat Post. It is important for the seat tube and the seat post to have precise corresponding sizes for a good fit while allowing smooth telescoping action for easy height adjustment.
Bicycle frame tube that is the center of construction. The tube into which the seat post is inserted.