Abstract: A bicycle handlebar stem specifically characterized, and distinct from other such stems in making it possible to attach the clamping surface of the handlebar in the center of the rotational axis of the steer tube. This stem, in union with a zero-degree-offset fork (already manufactured and popularly used) creates a front wheel/fork/stem/handlebar assembly; which is symmetrical in every respect. Such a symmetrical assembly being particularly dsirable in performing certain functions or tricks on stunt bicycles.