A hub for a bicycle includes a hub shell and an axle device. The hub shell is supported rotatably relative to the axle device by way of bearing devices. A bearing device is configured as a roller bearing, and includes two bearing rings with rolling members disposed between, and is sealed axially outwardly. Between the bearing rings, the roller bearing includes a modular unit, at which a sealing unit is configured for laterally sealing the roller bearing, and including guide units protruding laterally inwardly from the modular unit for guiding the rolling members.

A one-way bearing, a bearing assembly, and a free-wheeling mechanism for a bicycle are disclosed herewith. The bearing assembly, comprises a one-directional bearing having an inner and outer race, a first thrust bearing and a second thrust bearing, wherein the inner and outer races of the one-directional bearing are formed to retain one or both of the thrust bearings. The one-way bearing comprises an outer race and an inner race with a one-directional bearing mechanism located between said inner and outer races, the inner race comprising an inner race ring portion, with an inner flange projecting from the inner race ring portion in a first direction parallel to an axis of rotation of the bearing, and an outer flange, projecting in a second direction away from the axis of rotation of the bearing, an outer race comprising an outer race ring portion and an outer flange portion extending axially inwardly from the outer race ring portion, there therefore being defined a first bearing surface around an outer circumference of the inner race ring portion, a second bearing surface defined by the inner circumference of the outer race ring portion, a third bearing surface defined by a first sidewall of the inner race ring portion and/or the inner flange, a fourth bearing surface defined by a second sidewall of the inner race ring portion and/or the outer flange and a fifth bearing surface defined by an inner surface of the outer race flange portion.

A hub with disengaging effect of ratchet faces in an idle mode includes: a gear barrel with first and second housing parts is located at the spacing from the driven end of the hub; a ratchet disc fixed in the driven end has a first annular ratchet face corresponding to the gear barrel; a double-sided free toothed disc disposed in the first housing part is in synchronous rotation with the gear barrel, and includes a second annular ratchet face, which is in a single steering engagement drive relationship with the first annular ratchet face; an elastic expansion member is disposed between the ratchet and double-sided free toothed discs, to push off annular ratchet faces in idle mode; a repulsion disc is mounted in the second housing part at the circumferential direction; an axial repulsion member has repulsion parts which are respectively disposed in the double-sided free toothed and repulsion discs.

Provided is an intelligent electric wheel hub which belongs to the field of bicycle parts. Two ends of a cylindrical wheel hub housing (2) of the electric wheel hub are respectively connected to a wheel hub left end cover (25) and an outer flywheel ring (7) of a flywheel mechanism to form an inner cavity for integrating and accommodating a gear motor, a battery pack and a controller panel. The intelligent electric wheel hub is highly integrated and is energy-saving and environmentally friendly

A bicycle hub assembly comprises a hub axle, a hub shell, a sprocket support body, a first ratchet member, a second ratchet member, a first biasing member, at least one receiving member, and a second biasing member. The first ratchet member is provided between the second ratchet member and the first biasing member in an axial direction. The at least one receiving member is provided between the first ratchet member and the first biasing member in a radial direction with respect to a rotational axis. The at least one receiving member includes a radially receiving part having a radially outer surface. The second biasing member contacts the radially outer surface of the radially receiving part to bias the radially receiving part toward the rotational axis in the radial direction.

To provide a bicycle hub unit and a bicycle wheel assembly that allow a wheel unit to be appropriately coupled to a hub body, a bicycle hub unit is coupled to a rotary body to which a brake is applied by a brake device. The bicycle hub unit includes a hub body that rotates around a hub axle and a rotary body coupling portion that couples the rotary body to the hub body. The hub body includes a first joint portion and a second joint portion. The first joint portion includes an external thread coupled to an internal thread of the wheel unit. The second joint portion is coupled to a restriction member that restricts relative rotation of the first joint portion and the wheel unit.

The present disclosure provides a bicycle hub that provides improved drive line efficiency and bike-to-rider torque feedback. The drive line efficiencies are due to lower rolling resistance resulting from a novel bearing and sprag clutch configuration, a lightweight design, and immediate torque transfer from the cassette drive to the hub body. The bike-to-rider feedback has been improved as the torque transfer is smooth, predictable, and immediate.

A sprocket support body comprises an external spline configured to be engaged with an internal spline of a bicycle sprocket arrangement. The external spline includes a plurality of external-spline driving surfaces configured to transmit a rotational driving force between the sprocket support body and the bicycle sprocket arrangement in a circumferential direction. The plurality of external-spline driving surfaces includes at least four first external-spline driving surfaces and at least one second external-spline driving surface. The at least four first external-spline driving surfaces are respectively arranged on at least four of nine first external-spline driving positions equally arranged in the circumferential direction about a rotational center axis at a first external-spline pitch angle which is equal to 40 degrees. The at least one second external-spline driving surface is offset from the nine first external-spline driving positions in the circumferential direction about the rotational center axis.

A bicycle hub has a hub axle, a hub shell, a sprocket support body, first and second ratchet members and a friction member. The hub shell and the sprocket support body are mounted on the hub axle. The first ratchet member has at least one first ratchet tooth and rotates with the sprocket support body. The second ratchet member has at least one second ratchet tooth mating with the first ratchet tooth and rotates with the hub shell. The friction member is configured to rotate with one of the hub shell and the first ratchet member and contacts a contacted member configured to rotate with the other of the hub shell and the first ratchet member. The sprocket support body has a guiding portion that move the first ratchet member and the second ratchet member from each other while coasting.

A bicycle rear hub assembly comprises a hub axle, a hub body, and a sprocket support body. The hub axle includes an axle through-bore that has a minimum inner diameter equal to or larger than 13 mm. The hub body is rotatably mounted on the hub axle about a rotational center axis of the bicycle rear hub assembly. The sprocket support body is rotatably mounted on the hub axle about the rotational center axis.