Abstract: An electrical bicycle includes a front body unit, a rear body unit and a pivot coupler unit which couples the front body unit and the rear body unit. The coupler unit enables the front body unit to be turned relative to the rear body unit when the rider turns his or her body to shift his or her center of gravity.

Abstract: An electrical bicycle is constructed to include a front body unit, a rear body unit, and a pivot coupler unit coupled between the front body unit and the rear body unit for enabling the front body unit to be turned relative to the rear body unit to change the steering direction of the electrical bicycle when the rider of the electrical bicycle turned the body to change the center of gravity.

Abstract: An inline skate wheel mount with foldable wheels includes a base plate, two side plates locked to two sides of the base plate and confining a receiving space therebetween, a plurality of wheel sets movably connected to the side plates and located at a bottom portion of the wheel mount, a linkage movably connected to the wheel sets for controlling extension of the wheel sets out of the wheel mount and folding of the wheel sets in the receiving space between the side plates, and a press positioning structure disposed between tail ends of the side plates for retaining and positioning the wheel sets. Folding and extension mechanisms of the wheel sets are based upon the principle of linkage.