Many attempts have been made to utilize simultaneously the allied foot and arm powers while the arms also steer the bicycle. In the prior art the steering mechanisms pivot with the front wheel fork while at the same time imparting power to assist turning the wheels. Because of this dual function, inefficencies result. For a person to crank efficiently the hand crank rotational axis should be substantially parallel to the person's shoulder line, while the imaginary longitudinal center plane of his body lies in coincidence to a centrally located vertically oriented plane of the hand crank. In past devices the structures are such that, when their bars or handles are turned to the right or left, the above-referred to planes will automatically produce an obtuse included angle. In these instances the person cannot transmit an effective manual crank power because the anatomy of the human arms simply cannot function effectively in this position.