Abstract: An inline skate including a wheel-driving unit which generates power when a foot pushes on the ground to rotate the wheels, and when the boot is lifted, the frame is spaced apart from the ground to further increase the time required for stepping forward on the ground or being pushed from the ground, thereby obtaining propulsive force such that the inline skate quickly advances.

Abstract: The present disclosure relates a bicycle, and more particularly, to a kickboard-type bicycle capable of being used as a kickboard or a bicycle according to the user's choice, can be shifted between different speeds for easy speed control, requires the use of both legs (unlike conventional kickboards) so as to promote the balanced growth of youngsters who are in their growing years, and has pedals that can be adjusted to positions suitable for the user.

Abstract: The present invention relates to an inline skate, and more particularly, to an inline skate including a wheel-driving unit which generates power when a foot pushes on the ground to rotate the wheels, and when the boot is lifted, the frame is spaced apart from the ground to further increase the time required for stepping forward on the ground or being pushed from the ground, thereby obtaining propulsive force such that the inline skate quickly advances. To this end, the inline skate including the wheel-driving unit according to the present invention includes a boot, as well as a frame, on which a plurality of wheels are installed, on the bottom surface of the boot. One side end of the bottom surface of the boot is hingedly coupled to the upper end of the frame. One end of a link is hingedly coupled to the other side of the bottom surface of the boot. A driving gear is disposed on one end of the frame.