A structure of a freewheel and a hub contains a hub (20) including a first ratchet(21) having a pair of first teeth (22), a central shaft (23), a screw section (24), and a freewheel set (80); the hub (20) including a first chainwheel disc assembly (30), a ...

A hydraulic brake is used to a handle of a two wheel vehicle and contains a body (20) including two first tabs (22), the handle (50) including an axial hole (51) and a through bore (52) to receive an adjustable nut (53) having a screw aperture (54) to be s...