Abstract: A bicycle sprocket includes a sprocket body, and a plurality of sprocket teeth. At least one of the sprocket teeth includes a first layered member, a second layered member and a third layered member. The first layered member has a first axial surface and a second axial surface. The second layered member is attached to the first axial surface such that the first and second layered members overlap each other in an axial direction as viewed parallel to a rotational axis of the sprocket body. The third layered member is attached to the second axial surface such that the first and third layered members overlap each other in the axial direction as viewed parallel to the rotational axis of the sprocket body. The first layered member has a specific gravity that is less than those of the second layered member and the third layered member.

Abstract: A bicycle sprocket includes a sprocket body and a plurality of sprocket teeth. The sprocket teeth extend radially outwardly from an outer periphery of the sprocket body. The sprocket body includes a first layered member, a second layered member and a third layered member. The first layered member has a first axial surface and a second axial surface. The second layered member is attached to the first axial surface such that the first and second layered members overlap each other in an axial direction as viewed parallel to a rotational axis. The third layered member is attached to the second axial surface such that the first and third layered members overlap each other in the axial direction as viewed parallel to the rotational axis. At least one of the second and third layered members has at least one concavo-convex portion.

Abstract: A bicycle sprocket includes a sprocket body, and a plurality of sprocket teeth. At least one of the sprocket teeth includes a first layered member, a second layered member and a third layered member. The first layered member has a first axial surface and a second axial surface. The second layered member is attached to the first axial surface such that the first and second layered members overlap each other in an axial direction as viewed parallel to a rotational axis of the sprocket body. The third layered member is attached to the second axial surface such that the first and third layered members overlap each other in the axial direction as viewed parallel to the rotational axis of the sprocket body. The first layered member has a specific gravity that is less than those of the second layered member and the third layered member.

Abstract: A bicycle disc brake rotor is provided with a base rotor plate and a first layer. The base rotor plate includes an outer portion formed of iron. The outer portion has first and second base surfaces facing in opposite axial directions. The first layer overlies the first base surface of the outer portion of the base rotor plate to form a first outer surface. The first layer has a corrosion resistant characteristic which is superior to the base rotor plate.

Abstract: A bicycle disc brake rotor basically has an outer portion, an inner portion and an intermediate portion. The outer portion is made of a first material. The inner portion is made of the first material. The intermediate portion is disposed between the outer portion and the inner portion. The intermediate portion is made of the first material. The intermediate portion is partially laminated by a layer made of a second material. The second material is different from the first material. The layer has a contour tracing a contour of the intermediate portion.

Abstract: A composite bicycle rim includes a first annular side wall, a second annular side wall and an annular bridge. The first annular side wall has a first braking contact portion. The second annular side wall has a second braking contact portion. The annular bridge extends between the first and second annular side walls. At least one of the first and second braking contact portions has a plurality of exposed hard particles partially embedded in a non-metallic layer. The exposed hard particles are partially exposed on an outermost surface of the at least one of the first and second braking contact portions.

Abstract: A bicycle brake pad includes a cooling plate and a friction plate. The cooling plate has a first surface and a second surface. The cooling plate includes a pad supporting section and a heat dissipation section. The friction pad is connected to the pad supporting section of the cooling plate.

Abstract: A bicycle brake pad includes a cooling plate and a friction plate. The cooling plate has a first surface and a second surface. The cooling plate includes a pad supporting section and a heat dissipation section. The friction pad is mechanically and fixedly connected to the pad supporting section of the cooling plate.

Abstract: A disk brake rotor includes a first rotor portion, a second rotor portion and a third rotor portion. The second rotor portion has an annular portion and at least one ventilation hole. The third rotor portion also has an annular portion. The first portion is attached to and disposed between the second rotor portion and the third rotor portions, such that a surface of the first rotor portion is an exposed area exposed by the at least one ventilation hole.

Abstract: A bicycle disc brake rotor is provided with a base rotor plate and a first layer. The base rotor plate includes an outer portion formed of iron. The outer portion has first and second base surfaces facing in opposite axial directions. The first layer overlies the first base surface of the outer portion of the base rotor plate to form a first outer surface. The first layer has a corrosion resistant characteristic which is superior to the base rotor plate.

Abstract: A bicycle disc brake rotor is provided with a base rotor plate and a surface region. The base rotor plate includes an outer portion that is formed of iron. The outer portion has first and second base surfaces facing in opposite axial directions. The surface region is formed by a diffusion process on the base rotor plate. The surface region has a corrosion resistant characteristic which is superior to the base rotor plate.

Abstract: A bicycle disc brake rotor basically has an outer portion and a cooling fin. The outer portion has first and second base surfaces facing in opposite axial directions. The cooling fin is disposed radially offset from at least one of the first and second braking surfaces.

Abstract: A bicycle disc brake rotor basically has a base rotor plate and a first thermally sprayed layer. The base rotor plate includes an outer portion having first and second base surfaces facing in opposite axial directions. The first thermally sprayed layer is laminated on the first base surface of the outer portion of the base rotor plate to form a first outer surface.

Abstract: A bicycle disc brake rotor basically has an outer portion, an inner portion and an intermediate portion. The outer portion is made of a first material. The inner portion is made of the first material. The intermediate portion is disposed between the outer portion and the inner portion. The intermediate portion is made of the first material. The intermediate portion is at least partially laminated by a layer made of a second material. The second material is different from the first material. The layer has a contour tracing a contour of the intermediate portion.

Abstract: A bicycle disc brake rotor basically has a base rotor plate and a first thermally sprayed layer. The base rotor plate includes an outer portion having first and second base surfaces facing in opposite axial directions. The first thermally sprayed layer is laminated on the first base surface of the outer portion of the base rotor plate to form a first outer surface.

Abstract: A bicycle disc brake rotor basically has an outer portion, an inner portion and an intermediate portion. The outer portion is made of a first material. The inner portion is made of the first material. The intermediate portion is disposed between the outer portion and the inner portion. The intermediate portion is made of the first material. The intermediate portion is partially laminated by a layer made of a second material. The second material is different from the first material. The layer has a contour tracing a contour of the intermediate portion.

Abstract: A bicycle disk brake rotor apparatus comprises a generally circular first rotor member and a generally circular first second rotor member. The first rotor member has a first fixing component structured to mount the first rotor member to a hub mounting member, and the first second rotor member has a first fixing component structured to mount the first second rotor member to the hub mounting member. The first rotor member is attached to a side of the first second rotor member, and the first second rotor member is formed of a material having greater braking wear resistance than the first rotor member.

Abstract: A bicycle disk brake pad comprises a backing plate and a friction member. A first joined area of the friction member is welded to the backing plate, and a second joined area of the friction member is adhesively joined to the backing plate.

Abstract: A disc brake rotor apparatus includes an annular inner member for mounting to a hub, an annular outer member concentric with the annular inner member and having opposite braking surfaces, a first intermediate member extending radially outwardly from the annular inner member to the annular outer member, and a second intermediate member extending radially outwardly from the annular inner member to the annular outer member. The first intermediate member is at least partially and axially spaced apart from the second intermediate member and forms a chamber therebetween.

Abstract: A bicycle brake pad includes a cooling plate and a friction plate. The cooling plate has a first surface and a second surface. The cooling plate includes a pad supporting section and a heat dissipation section. The friction pad is mechanically and fixedly connected to the pad supporting section of the cooling plate.