A handlebar comprises a transverse extension piece including a first gripping portion. First and second handlebar segments are disposed on opposite ends of the transverse extension piece. Each of the handlebar segments comprises an upper handlebar grip portion and a lower handlebar grip portion. The upper handlebar grip portion includes a first curved section adjoining one end of the transverse extension piece and extending forwardly and inwardly from the transverse extension piece, and a second straight section. The upper handlebar grip portion includes a second gripping portion. The lower handlebar grip portion includes a curved end portion adjoining the end of the second straight section of the upper handlebar grip portion and extends outwardly and then downwardly. The lower handlebar grip portion includes a third gripping portion. The three gripping portions of the handlebar define a plurality of gripping positions in combination with a plurality of riding positions.