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  1. Components
  2. Stems

Custom Bicycle Stems

All stems are Hand Made by Koichi Yamaguchi.


~ + S&H


~ + S/H

Track Stem Quill

~ + S/H

Yamaguchi Aero stems were used by the 1992 U.S. Olympic Team - Erin Hartwell rode a Yamaguchi Kilo bike with a Yamaguchi aero stem to clock 1:04:753 for an Olympic Bronze Medal.

U.S. National Time Trial, Team Pursuit, Point Race, and Road Race riders used Yamaguchi aero stems.