Adjustable stem for a bicycle

摘要

An adjustable stem for a bicycle comprises a vertical tube; a lateral tube having one end pivotally connected to the top end of the vertical tube and a lateral channel in the interior thereof; a push rod disposed within the lateral channel; an engaging block disposed at one end of the lateral tube; and a quick-release mechanism which allows the engaging block to movably push the top of the vertical tube and one end of the push rod so that the other end of the push rod tightly contacts the bicycle handle.