Abstract: A cassette for a bicycle may include a plurality of sprocket portions joined together into a single unit. The cassette may include a cavity formed in the large end of the cassette. A related manufacturing method may include joining a first generally planar sprocket portion having a plurality of connector portions extending transverse to the plane of the first sprocket portion, to a second generally planar sprocket portion, e.g., by fusing at least one of the connector portions to the second sprocket portion.

Abstract: A cassette for a bicycle may include a plurality of sprocket portions joined together into a single unit. The cassette may include a cavity formed in the large end of the cassette. A related manufacturing method may include joining a first generally planar sprocket portion having a plurality of connector portions extending transverse to the plane of the first sprocket portion, to a second generally planar sprocket portion, e.g., by fusing at least one of the connector portions to the second sprocket portion.

Abstract: A bicycle wheel assembly may include a cassette having a plurality of sprocket portions, the cassette being configured such that a cavity or recess is formed in a large end of the cassette. A wheel hub coupled to the cassette may include a spoke connection flange that is disposed at least partially within the cavity of the cassette, facilitating a more acute spoke angle.

Abstract: A cassette for a bicycle may include a plurality of sprocket portions fused into a single unit. The cassette may include a cavity formed in the large end of the cassette. Spokes of an associated wheel may be at least partially disposed in the cavity. A related manufacturing method may include joining a first generally planar sprocket portion having a plurality of connector portions extending transverse to the plane of the first sprocket portion, to a second generally planar sprocket portion by fusing at least one of the connector portions to the second sprocket portion.

Abstract: A bicycle crank set is comprising a crank having at least one support portion protruding therefrom, a first lateral surface, a second lateral surface opposite to the first lateral surface; a first chain wheel located at the first lateral surface and having a second through hole; a second chain wheel located at the second lateral surface and having at least one threaded hole; and a screw bolt inserted outward through the second through hole and then the first through hole to be engaged with the threaded hole. Accordingly, the bicycle crank set is structurally simple and convenient in assembly and the head of the screw bolt is hidden at the inner side of the crank set to be aesthetic in appearance.