A bicycle drive includes a multi-sprocket arrangement for rotatable mounting on a rear-wheel axle an engagement with a bicycle chain having inner link plate pairs and chain outer link plate pairs. The multi-sprocket arrangement includes a sprocket having, between an axial inner side and an oppositely situated axial outer side, a flat sprocket body and a plurality of teeth formed on a circumference of the sprocket. The plurality of teeth include at least one tooth of a first tooth group, the axial width of which is dimensioned to be greater than a chain inner link plate spacing and smaller than a chain outer link plate spacing, and a second tooth group, the axial width of which are dimensioned to be smaller than the chain inner link plate spacing.

A bicycle sprocket comprises a sprocket body, sprocket teeth, and at least one shifting facilitation area. The sprocket teeth include at least one first tooth and at least one second tooth. The at least one first tooth includes a first tooth center plane defined to bisect a first maximum axial width. The at least one second tooth includes a second tooth center plane defined to bisect a second maximum axial width. The second tooth center plane is offset from the first tooth center plane in an axial direction. The at least one shifting facilitation area is configured to facilitate a shifting operation of the bicycle chain.

A crank assembly for a bicycle includes a crank arm, multiple first and second securing members, and a sprocket unit having small, medium, and large sprockets. The small sprocket includes a toothed ring and multiple first fastening pieces. The medium sprocket includes a toothed ring, multiple second and third fastening pieces, and multiple spacing-adjustment pieces each extending obliquely and interconnecting a respective one of the second fastening pieces and a respective one of the third fastening pieces. The large sprocket includes a toothed ring and multiple fourth fastening pieces. The first securing members secure the small and medium sprockets to the crank arm. The second securing members secure the large sprocket to the medium sprocket.

A bicycle front sprocket comprises a sprocket body and at least one sprocket tooth. The sprocket body includes a crank arm mounting portion including a first mounting axial surface facing toward an axial bicycle-center plane in an axial direction in a state where the bicycle front sprocket is mounted to the bicycle frame. The at least one sprocket tooth has a first chain-engagement axial surface facing toward the axial bicycle-center plane in the axial direction in a state where the bicycle front sprocket is mounted to the bicycle frame. The first chain-engagement axial surface is offset from the first mounting axial surface toward the axial bicycle-center plane in the axial direction. An axial distance is defined from the first mounting axial surface to the first chain-engagement axial surface in the axial direction and is equal to or larger than 6 mm.

A right crank arm assembly for a bicycle, comprises a right crank arm and at least one front sprocket coupled with the crank arm at at least one coupling portion of the crank arm. The front sprocket has an inner side adapted, in use, to face towards the frame of the bicycle and an outer side opposite the inner side. The assembly comprises at least one first crank arm element which acts in contact with the front sprocket on one of said sides and at least one second crank arm element which acts in contact with the front sprocket on the other of said sides. The contact action of the crank arm elements on the two opposite sides of the front sprocket prevents the twisting deformation of the front sprocket during pedaling. Such a deformation would cause a reduction in the transmission efficiency of the right crank arm assembly.

A bicycle crank assembly comprises a crank arm, a first sprocket, and a second sprocket. One of the first sprocket and the second sprocket comprises a first shifting facilitation area to facilitate a first shifting operation in which a bicycle chain is shifted from the second sprocket toward the first sprocket in a first chain-phase state in which a reference tooth of a plurality of second sprocket teeth is received in an outer link space, and a second shifting facilitation area to facilitate a second shifting operation in which the bicycle chain is shifted from the second sprocket toward the first sprocket in a second chain-phase state in which the reference tooth of the plurality of second sprocket teeth is received in an inner link space.

The invention relates to a multi-sprocket arrangement for installation on a rear-wheel hub and for engagement with a bicycle chain. The multi-sprocket arrangement includes at least ten adjacent sprockets with different numbers of teeth. In each case of the at least ten adjacent sprockets two adjacent sprockets of the sprockets are arranged with a defined spacing to one another. The defined spacing corresponds either to a smallest spacing or to a larger spacing.

A pin for a crown of a bicycle crankset that includes a mounting portion configured to be fixed to the crown, a chain engaging portion having a first face that faces towards said mounting portion for engaging a plate of a link of a bicycle chain, and a second face that faces the opposite way with respect to said mounting portion. The second face has at least one first surface portion inclined by a first angle smaller than 90 when measured in a longitudinal section plane of the pin.

A shifting assembly for shifting a roller chain between a plurality of front chain wheels for a bicycle that includes a smaller chain wheel, a larger chain wheel and a chain derailleur having a channel on an inner guide plate. The channel has an elevation that comes into contact with a chain rise rivet on the larger chain wheel in the state of starting to shift the roller chain from the smaller chain wheel to the adjacent larger chain wheel, viewed in a direction parallel to the axis of rotation of the chain wheels.

A bicycle front sprocket assembly is basically provided with a first sprocket, a second sprocket, a sprocket carrier and a chain guiding portion. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The second sprocket teeth are disposed on a second outer periphery of the second sprocket body. The sprocket carrier includes a torque transmitting profile and a sprocket mounting portion. The chain guiding portion is positioned between the first and second sprockets in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly. At least one of the first and second sprockets is mounted to the sprocket mounting portion of the sprocket carrier by a non-threaded fastener.