ADJUSTABLE STEM FOR A BICYCLE

摘要

A bicycle stem (1), comprises a fork rod head (12) attached to a fork rod (10); a handlebar clamp piece (20); a coupling member (30) rotatably coupled with the fork rod head (12) by a first pivot mechanism (41) and rotatably coupled with the handlebar clamp piece (20) by a second pivot mechanism (42); and dual quick release clamping means (200) having one common lever (190) for simultaneously clamping or releasing said first and second pivot mechanisms (41; 42).