A bicycle hub includes an axle, a main body, a freehub body, and a clutch, which are engaged with the axle, wherein the clutch includes a first ratchet and a second ratchet. The first ratchet and the second ratchet are respectively engaged with the main body and the freehub body. The first ratchet has a first engaging surface, and the second ratchet has a second engaging surface facing the first engaging surface. The bicycle hub is characterized in that a minimum of number of first ratchet teeth on the first engaging surface is seventy-two, and a number of the second ratchet teeth on the second engaging surface is lesser than the number of first ratchet teeth. With such design, when the first ratchet is meshed with the second ratchet, the freehub body could stably drive the main body, and a total weight of the bicycle hub could be decreased.

A bicycle hub includes an axle, a main body, a freehub body, and a clutch, which are engaged with the axle. The freehub body is disposed with first splines, wherein each of the first splines is defined to have a longitudinal direction. Each of the longitudinal directions obliquely intersects with an axial direction of the freehub body. The clutch is disposed with second splines, wherein the second splines are engaged with the first splines in a way that the second splines are movable along a longitudinal direction of the first splines. With such design, the clutch of the bicycle hub could be smoothly operated.

A sprocket support body is rotatably mounted on a hub axle of a bicycle rear hub assembly. The sprocket support body comprises at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface. The at least ten external spline teeth has an external-spline major diameter equal to or smaller than 34 mm. The sprocket support body is free of external spline teeth having another external-spline major diameter that is different from the external-spline major diameter.

A bicycle hub assembly includes a hub shell including a braking surface. A coaster brake shoe is accommodated in the hub shell and cooperates with the braking surface to generate braking force. A motor is accommodated in the hub shell and configured to be controlled for at least changing or maintaining a gear ratio.

Wheel hub arrangement for a drive with rotated drum that has a stationary shaft (13); a hollow drum (19, 20) arranged by bearings around it, a wheel drum (32) that includes a hub of the driven wheel, and freewheels, inner sleeve (21, 22) which are arranged around the stationary shaft (13) by bearings, and placed partially in the cavity of the drum (19, 20). The wheel hub arrangement for a drive with rotated drum for bicycles, street stepper vehicles, wheelchairs and tricycles.

A planet carrier ring-freewheel assembly for a transmission device including a planetary gear for a wheel hub drive for a vehicle is disclosed. The assembly includes a freewheel inner ring and/or a freewheel outer ring of a freewheel device for transmitting, dependent on a direction of rotation, a net torque provided by a drive unit of the wheel hub drive to a hub housing of the wheel hub drive, and a planet carrier ring of the planetary gear structured for supporting planet gear wheels. The planet carrier ring and the freewheel inner ring and/or the free wheel outer ring are directly fixed to one another by a positive connection in a non-rotatable and tension-resistant manner.

A pedaled drivetrain includes a drive mechanism, a wheel, a freewheel hub, and a locking mechanism. The wheel has a rotational axis. The freewheel hub connects the drive mechanism to the wheel, and the freewheel hub transmits torque from the drive mechanism to the wheel in a first rotational direction around the rotational axis. The locking mechanism has a locked state and an unlocked state. The locked state rotationally fixes a component of the drive mechanism to the wheel relative to the rotational axis.

A pedaled drivetrain includes a drive mechanism, a wheel, a freewheel hub, and a locking mechanism. The wheel has a rotational axis. The freewheel hub connects the drive mechanism to the wheel, and the freewheel hub transmits torque from the drive mechanism to the wheel in a first rotational direction around the rotational axis. The locking mechanism has a locked state and an unlocked state. The locked state rotationally fixes a component of the drive mechanism to the wheel relative to the rotational axis.

A hub motor assembly includes a hub axle, a hub shell, a motor unit, a cycloidal speed reducer, and a one-way clutch unit. When an output shaft of the motor unit rotates in a first direction about an axial line, a cycloidal wheel of the cycloidal speed reducer is driven to produce an eccentric cycloidal motion relative to the axial line, to thereby drive rotation of the hub shell in the first direction. When the output shaft rotates in a second direction opposite to the first direction, the hub shell is prevented from rotating with the output shaft.

A bicycle hub assembly comprises a hub axle, a hub body, a sprocket support body, and a freewheel structure. The sprocket support body includes at least ten external spline teeth configured to engage with a bicycle rear sprocket assembly. Each of the at least ten external spline teeth has an external-spline driving surface and an external-spline non-driving surface. The freewheel structure includes a first ratchet member and a second ratchet member. The first ratchet member includes at least one first ratchet tooth. The second ratchet member includes at least one second ratchet tooth configured to engage with the at least one first ratchet tooth in a torque transmitting manner.