Bicycle front sprocket assembly

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, each of the first sprocket teeth having a first axial tooth center plane;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body, each of the second sprocket teeth having a second axial tooth center plane;
• and
• a sprocket carrier including a torque transmitting profile and a sprocket mounting portion, the sprocket carrier being a separate member from both of the first and second sprockets, the sprocket carrier having a non-metallic portion and a metallic portion,
• at least one of the first sprocket and the second sprocket being mounted to the sprocket mounting portion of the sprocket carrier by a non-threaded fastener that is received in a blind bore of the metallic portion of the sprocket carrier, and
• a maximum axial distance defined between the first axial tooth center plane and the second axial tooth center plane in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly being smaller than or equal to 9.5 mm.

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body;
• and
• a sprocket carrier including a torque transmitting profile and a sprocket mounting portion, the sprocket carrier having a non-metallic portion and a metallic portion,
• at least one of the first sprocket and the second sprocket being mounted to the sprocket mounting portion of the sprocket carrier by a non-threaded fastener that is received in a blind bore of the metallic portion of the sprocket carrier,
• at least one of the first sprocket teeth and the second sprocket teeth including at least one outer-link engaging tooth having a first axial width and at least one inner-link engaging tooth having a second axial width, and
• the first axial width of the outer link engaging tooth being larger than the second axial width of the inner link engaging tooth.

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, each of the first sprocket teeth having a first axial tooth center plane;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body, each of the second sprocket teeth having a second axial tooth center plane;
• and
• a sprocket carrier including a torque transmitting profile, the sprocket carrier having a non-metallic portion and a metallic portion;
• at least one of the first and second sprockets and the sprocket carrier has an axial protuberance integrally formed therewith as a unitary one-piece member so as to be positioned between the sprocket carrier and one of the first sprocket and the second sprocket in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly;
• the one of the first sprocket and the second sprocket being mounted to the sprocket carrier by a non-threaded fastener extending into the axial protuberance, the non-threaded fastener being received in a blind bore of the metallic portion of the sprocket carrier.

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body made of a non-metallic material and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body;
• and
• a sprocket carrier including a torque transmitting profile, the sprocket carrier having a non-metallic portion and a metallic portion,
• at least one of the first sprocket and the second sprocket being mounted to the sprocket carrier by a non-threaded fastener that is received in a blind bore of metallic portion of the sprocket carrier.

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body at least partly made of a non-metallic material and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body, the second sprocket being smaller than the first sprocket and being located adjacent to the first sprocket without another sprocket disposed axially between the first and second sprockets;
• and
• a sprocket carrier being integrally provided with one of the first sprocket and the second sprocket, the sprocket carrier including a crank arm mounting portion that includes a plurality of splines configured to engage a mounting boss of a bicycle crank arm in a state where the sprocket carrier is mounted to the bicycle crank arm, a rotational center axis of the bicycle crank arm passing through the mounting boss;
• and
• a chain guiding portion positioned between the first sprocket teeth and the second sprocket teeth in an axial direction that is parallel to a rotational center axis of the bicycle front sprocket assembly, the chain guiding portion being positioned radially outward with respect to the second sprocket teeth and including an inclined surface inclining from the first sprocket toward the second sprocket in the axial direction, the chain guiding portion being formed by a plurality of ribs.

A bicycle front sprocket assembly comprising:

• a first sprocket including a first sprocket body and a plurality of first sprocket teeth disposed on a first outer periphery of the first sprocket body, each of the first sprocket teeth having a first axial tooth center plane;
• a second sprocket including a second sprocket body and a plurality of second sprocket teeth disposed on a second outer periphery of the second sprocket body, each of the second sprocket teeth having a second axial tooth center plane, the second sprocket being smaller than the first sprocket and being located adjacent to the first sprocket without another sprocket disposed axially between the first and second sprockets;
• a sprocket carrier including a torque transmitting profile and a sprocket mounting portion;
• and
• a chain guiding portion positioned between the first sprocket teeth and the second sprocket teeth in an axial direction parallel to a rotational center axis of the bicycle front sprocket assembly, the chain guiding portion being positioned radially outward with respect to the second sprocket teeth and including an inclined surface inclining from the first sprocket toward the second sprocket in the axial direction, the chain guiding portion being formed by a plurality of ribs,
• a maximum axial distance defined between the first axial tooth center plane and the second axial tooth center plane in the axial direction being smaller than or equal to 9.5 mm,
• at least one of the first sprocket teeth and the second sprocket teeth including at least one outer-link engaging tooth having a first axial width and at least one inner-link engaging tooth having a second axial width, and
• the first axial width of the outer link engaging tooth being larger than the second axial width of the inner link engaging tooth.