Mountain bike stems and road bike stems – quill, threadless, fixed and adjustable stems for any desire and requirement. Adjustable stems have the handlebar clamp unit mounted on a moveable slide, permitting variable fore and aft settings. Quill stems offer the ability to make fine adjustments to handlebar height, but threadless stems allow for the lighter carbon fiber or aluminium alloy steerer tubes, and hence a lighter overall bicycle – these are just some of advantages that many variations of stems offer.