Abstract: A folding bicycle having an elongated handlebar assembly including an elongated post that is hinged at its lower end to swing into a folded position, and a triangular brace assembly having its apex end connected to the upper-end portion of the post at a pivot that lies along the steering axis fo the bicycle, by a quick-connect and quick-release coupling permitting quick and easy folding and unfolding of the bicycle. The base end of the brace assembly extends transversely of the bicycle for lateral and torsional rigidity, the brace bars being anchored to the frame by two laterally spaced hinges defining a common axis. Each brace bar has a section of adjustable length, and each hinge has a take-up mechanism.