Bicycle chain

A bicycle chain comprising:

• a first inner link plate comprising:
• a first inner-link end portion including a first inner-link opening having a first inner-link center axis extending in an axial direction;
• a second inner-link end portion including a second inner-link opening having a second inner-link center axis extending along the first inner-link center axis, the second inner-link center axis being spaced apart from the first inner-link center axis in a first inner-link longitudinal direction;
• and
• a first inner-link intermediate portion interconnecting the first inner-link end portion and the second inner-link end portion, the first inner-link end portion, the second inner-link end portion and the first inner-link intermediate portion defining a first inner-link outer peripheral edge comprising:
• a first inner-link end edge extending about the first inner-link end portion;
• a second inner-link end edge extending about the second inner-link end portion;
• and
• a pair of first inner-link intermediate edges extending along the first inner-link intermediate portion between the first inner-link end edge and the second inner-link end edge;
• a second inner link plate comprising:
• a third inner-link end portion including a third inner-link opening having a third inner-link center axis extending through the first inner-link opening;
• a fourth inner-link end portion including a fourth inner-link opening having a fourth inner-link center axis extending through the second inner-link opening, the fourth inner-link center axis being spaced apart from the third inner-link center axis in a second inner-link longitudinal direction;
• and
• a second inner-link intermediate portion interconnecting the third inner-link end portion and the fourth inner-link end portion, the third inner-link end portion, the fourth inner-link end portion and the second inner-link intermediate portion defining a second inner-link outer peripheral edge comprising:
• a third inner-link end edge extending about the third inner-link end portion;
• a fourth inner-link end edge extending about the fourth inner-link end portion;
• and
• a pair of second inner-link intermediate edges extending along the second inner-link intermediate portion between the third inner-link end edge and the fourth inner-link end edge;
• and
• a first chamfer having a first radial width defined in a radial direction with respect to the first inner-link center axis, wherein
• the first radial width increases from one of the pair of first inner-link intermediate edges toward a first inner-link longitudinal centerline when viewed in the axial direction.

A bicycle chain comprising:

• a first inner link plate comprising:
• a first inner-link end portion including a first inner-link opening having a first inner-link center axis extending in an axial direction;
• a second inner-link end portion including a second inner-link opening having a second inner-link center axis extending along the first inner-link center axis, the second inner-link center axis being spaced apart from the first inner-link center axis in a first inner-link longitudinal direction;
• and
• a first inner-link intermediate portion interconnecting the first inner-link end portion and the second inner-link end portion, the first inner-link end portion, the second inner-link end portion and the first inner-link intermediate portion defining a first inner-link outer peripheral edge comprising:
• a first inner-link end edge extending about the first inner-link end portion;
• a second inner-link end edge extending about the second inner-link end portion;
• and
• a pair of first inner-link intermediate edges extending along the first inner-link intermediate portion between the first inner-link end edge and the second inner-link end edge;
• and
• a second inner link plate comprising:
• a third inner-link end portion including a third inner-link opening having a third inner-link center axis extending through the first inner-link opening;
• a fourth inner-link end portion including a fourth inner-link opening having a fourth inner-link center axis extending through the second inner-link opening, the fourth inner-link center axis being spaced apart from the third inner-link center axis in a second inner-link longitudinal direction;
• and
• a second inner-link intermediate portion interconnecting the third inner-link end portion and the fourth inner-link end portion, the third inner-link end portion, the fourth inner-link end portion and the second inner-link intermediate portion defining a second inner-link outer peripheral edge comprising:
• a third inner-link end edge extending about the third inner-link end portion;
• a fourth inner-link end edge extending about the fourth inner-link end portion;
• and
• a pair of second inner-link intermediate edges extending along the second inner-link intermediate portion between the third inner-link end edge and the fourth inner-link end edge,
• the first inner-link end portion is so dimensioned as to provide a first overlapping area to overlap with a chamfer of a first tooth of a sprocket when viewed in the axial direction in a state where the bicycle chain is engaged with the sprocket,
• the second inner-link end portion is so dimensioned as to provide a second overlapping area to overlap with a chamfer of a second tooth of the sprocket when viewed in the axial direction in the state where the bicycle chain is engaged with the sprocket,
• the third inner-link end portion is so dimensioned as to provide a third overlapping area to overlap with the first tooth of the sprocket when viewed in the axial direction in the state where the bicycle chain is engaged with the sprocket,
• the fourth inner-link end portion is so dimensioned as to provide a fourth overlapping area to overlap with the second tooth of the sprocket when viewed in the axial direction in the state where the bicycle chain is engaged with the sprocket,
• the first inner-link end edge has a first chamfer provided in the first overlapping area on a first inner-link longitudinal centerline when viewed in the axial direction,
• the first chamfer having a first radial width defined in a radial direction with respect to the first inner-link center axis, and
• the first radial width increases from one of the pair of first inner-link intermediate edges toward a first inner-link longitudinal centerline when viewed in the axial direction.