Bicycle saddle clamp fixture has octagonal saddle down tube with octagonal sleeve in octagonal frame socket

摘要

A bicycle saddle (5) rests on an octagonal tube (2) with a surrounding octagonal sleeve within a frame tube (3). The frame tube has a circular outer profile and an octagonal inner profile. Each profile (2, 3, 4) has a transverse hole (21, 43, 32) for a single grub screw (10) passing through all three tubes. The grub screw clamps all three faces together.