Abstract: A hub device is provided, including: a hub shell, defining an axial direction, including a room and a projection, the room having an opening open in the axial direction, an inner wall of the room being integrally connected with the projection, the room further including an annular toothed portion, the projection projecting radially within the room; and a ratchet ring, including an outer toothed portion and an engaging slot corresponding to the projection, the ratchet ring being disposing in the room, the outer toothed portion being engaged with the annular toothed portion so that the ratchet ring is rotatable with the hub shell, the engaging slot being disposed on the ratchet ring, the projection being engaged radially within the engaging slot and abutted radially against the hub shell.

Abstract: A hub device is provided, including: a hub shell, defining an axial direction, including a room open in the axial direction, an inner wall of the room including an annular toothed portion and an annular trench; a ratchet ring, including an outer toothed portion, the ratchet ring being disposed in the room, the outer toothed portion and the annular toothed portion being engaged with each other; and a blocking member, disposed within the annular trench, the blocking member and the ratchet ring being blocked with each other in the axial direction.

Abstract: A quick release structure includes a rod member, an arm member, a restriction member, and a pushing means. The rod member includes a toothed member having a plurality of rows of first teeth arranged spacedly thereon. The arm member has a plurality of rows of second teeth arranged spacedly on its inner peripheral surface. The arm member is sleeved on the toothed member and is axially slidable. The restriction member is disposed on the rod member. The pushing means is arranged between the rod member and the arm member to make the rows of first teeth and the rows of second teeth being engaged normally. When the arm member is moved axially to a rotation position, the rows of first teeth and the rows of second teeth are staggered and aligned alternately so that the arm member is rotatable relative to the rod member.

Abstract: A bicycle axle is provided, including a mandrel and a sleeve member. The mandrel defines an axial direction and includes an axial rod, a head portion radially protruding from an end of the axial rod and an engaging portion radially protruding from the axial rod and being axially spaced apart from the head portion. The sleeve member is sleeved around the head portion and includes a flange radially extending inwardly. At least part of the flange is located between the head portion and the engaging portion and is abuttable against the head portion and the engaging portion in the axial direction.

Abstract: A quick release structure includes a rod member, an arm member, a restriction member, and a pushing means. The rod member includes a toothed member having a plurality of rows of first teeth arranged spacedly thereon. The arm member has a plurality of rows of second teeth arranged spacedly on its inner peripheral surface. The arm member is sleeved on the toothed member and is axially slidable. The restriction member is disposed on the rod member. The pushing means is arranged between the rod member and the arm member to make the rows of first teeth and the rows of second teeth being engaged normally. When the arm member is moved axially to a rotation position, the rows of first teeth and the rows of second teeth are staggered and aligned alternately so that the arm member is rotatable relative to the rod member.

Abstract: A bicycle axle is provided, including a mandrel and a sleeve member. The mandrel defines an axial direction and includes an axial rod, a head portion radially protruding from an end of the axial rod and an engaging portion radially protruding from the axial rod and being axially spaced apart from the head portion. The sleeve member is sleeved around the head portion and includes a flange radially extending inwardly. At least part of the flange is located between the head portion and the engaging portion and is abuttable against the head portion and the engaging portion in the axial direction.

Abstract: A shock absorber has an outer tube, an inner tub, a piston rod, a piston and a damping device. The inner tube is slidably inserted into the outer tube and has an inner space with an inner diameter. The piston is securely mounted on the piston rod, is slidably held inside the inner tube to divide the inner space of the inner tube into two segments and has at least one channel. The damping device has a plug and a sleeve. The plug is securely attached to the piston and has a diameter. The sleeve is securely mounted in the inner tube and has an inner diameter. The diameter of the plug is smaller than the inner diameters of the inner tube and the sleeve. The inner diameter of the sleeve is smaller than that of the inner tube.

Abstract: A shock absorber has an outer tube, an inner tub, a piston rod, a piston and a damping device. The inner tube is slidably inserted into the outer tube and has an inner space with an inner diameter. The piston is securely mounted on the piston rod, is slidably held inside the inner tube to divide the inner space of the inner tube into two segments and has at least one channel. The damping device has a plug and a sleeve. The plug is securely attached to the piston and has a diameter. The sleeve is securely mounted in the inner tube and has an inner diameter. The diameter of the plug is smaller than the inner diameters of the inner tube and the sleeve. The inner diameter of the sleeve is smaller than that of the inner tube.