The present disclosure relates to a chain ring having teeth positioned in one of three lateral positions. At least one tooth may be placed in each lateral position. At least half the teeth may be positioned in a middle lateral position. The teeth in the first and third lateral positions may apply opposing lateral forces to a bicycle drive chain.

The present disclosure relates to a chain ring having teeth positioned in one of three lateral positions. At least one tooth may be placed in each lateral position. At least half the teeth may be positioned in a middle lateral position. The teeth in the first and third lateral positions may apply opposing lateral forces to a bicycle drive chain.

A bicycle-chain outer link plate comprises a first outer-link end portion, a second outer-link end portion, and a first outer-link intermediate portion. The first outer-link end portion comprises a first outer-link opening and a first outer-link end outermost edge. The second outer-link end portion comprises a second outer-link opening and a second outer-link end outermost edge. The first outer-link intermediate portion comprises a first outer-link intermediate outermost edge and a first additional outer-link intermediate outermost edge. The first outer-link intermediate portion has a first distance defined in an axial direction on a first outer-link longitudinal axis. The first outer-link intermediate outermost edge has a second distance defined in the axial direction. The first outer-link end outermost edge has a third distance defined in the axial direction. The first distance is larger than the second distance and the third distance. The second distance is larger than the third distance.

A bicycle-chain outer link plate comprises a first outer-link end portion, a second outer-link end portion, and a first outer-link intermediate portion. The first outer-link end portion comprises a first outer-link opening and a first outer-link end outermost edge. The second outer-link end portion comprises a second outer-link opening and a second outer-link end outermost edge. The first outer-link intermediate portion comprises a first outer-link intermediate outermost edge and a first additional outer-link intermediate outermost edge. The first outer-link intermediate portion has a first distance defined in an axial direction on a first outer-link longitudinal axis. The first outer-link intermediate outermost edge has a second distance defined in the axial direction. The first outer-link end outermost edge has a third distance defined in the axial direction. The first distance is larger than the second distance and the third distance. The second distance is larger than the third distance.

A straddled electric vehicle includes an electric motor including an output shaft oriented in a direction perpendicular or substantially perpendicular to a vehicle width direction, a drive bevel gear that rotates around a rotation axis oriented in a direction perpendicular or substantially perpendicular to the vehicle width direction, a driven bevel gear that rotates around a rotation axis oriented in the vehicle width direction, and a drive pulley that rotates around a rotation axis which is oriented in the vehicle width direction. The drive bevel gear and the driven bevel gear convert rotation generated by the electric motor around a rotation axis oriented in a direction perpendicular or substantially perpendicular to the vehicle width direction into rotation around a rotation axis oriented in the vehicle width direction, which is transmitted to the drive pulley.

A straddled electric vehicle includes an electric motor including an output shaft oriented in a direction perpendicular or substantially perpendicular to a vehicle width direction, a drive bevel gear that rotates around a rotation axis oriented in a direction perpendicular or substantially perpendicular to the vehicle width direction, a driven bevel gear that rotates around a rotation axis oriented in the vehicle width direction, and a drive pulley that rotates around a rotation axis which is oriented in the vehicle width direction. The drive bevel gear and the driven bevel gear convert rotation generated by the electric motor around a rotation axis oriented in a direction perpendicular or substantially perpendicular to the vehicle width direction into rotation around a rotation axis oriented in the vehicle width direction, which is transmitted to the drive pulley.

A carbon fiber toothed structure has a body. The body is circular and has a toothed segment and at least one carbon fiber cloth. The toothed segment is formed on an outer periphery of the body. The at least one carbon fiber cloth is deposited on a front side and a rear side of the body from a center to the outer periphery of the body to cover the toothed segment. The body is made by stacking multiple circular carbon fiber cloths of different diameters with each other. Some of the carbon fiber cloths deposited in the body have smaller diameters than those of the others of the carbon fiber cloths to enable the center of the body being thicker than the outer periphery of the body. The toothed segment has two guiding inclined planes respectively deposited on the front side and the rear side of the body.

A carbon fiber toothed structure has a body. The body is circular and has a toothed segment and at least one carbon fiber cloth. The toothed segment is formed on an outer periphery of the body. The at least one carbon fiber cloth is deposited on a front side and a rear side of the body from a center to the outer periphery of the body to cover the toothed segment. The body is made by stacking multiple circular carbon fiber cloths of different diameters with each other. Some of the carbon fiber cloths deposited in the body have smaller diameters than those of the others of the carbon fiber cloths to enable the center of the body being thicker than the outer periphery of the body. The toothed segment has two guiding inclined planes respectively deposited on the front side and the rear side of the body.

A bicycle crank assembly has a sprocket, a first crank arm, a second crank arm and a crank axle, A first axial distance is defined between the first pedal attachment surface and the second pedal attachment surface in an axial direction. A second axial distance is defined between the first transverse center plane of the sprocket and the second axial center plane of the crank axle in the axial direction. The first axial distance is smaller than or equal to 170 mm. The second axial distance is larger than or equal to 55 mm.

A sprocket guard assembly comprising a sprocket having sprocket radial spokes, and having teeth on an outer perimeter, the teeth disposed in a plane CL1, each sprocket radial spoke communicating with a first cylindrical surface, a circular member having circular member radial spokes, and each circular member radial spoke communicating with a second cylindrical surface, a collar having an outer cylindrical surface, a fastener engaging the collar, the first cylindrical surface and the second cylindrical surface engaging the outer cylindrical surface, all coplanar in a plane CL2, and plane CL1 is offset from plane CL2.