Abstract: An aerodynamic bicycle frame is described. In one embodiment, the aerodynamic bicycle frame comprises a head tube; a top tube, a first end of the top tube being connected with the head tube; a down tube, a first end of the down tube being connected with the head tube; a pair of seat stays connected with a second end of the top tube; and a one-part arcuate tube joining an upper region of the pair of seat stays and a second end of the down tube, the one-part arcuate tube being curved longitudinally toward the head tube so as to conform to a curvature of a rear bicycle wheel, the one-part arcuate tube shielding an angular section of the rear bicycle wheel from aerodynamic turbulence to reduce the net aerodynamic drag on the frame.