A bicycle guard is provided that has a minimal number of parts required for mounting. A drive unit is provided with the bicycle guard. The bicycle guard includes a first attaching part and a housing. The first attaching part is configured to be attached to a first connection part that connects a bicycle frame. The housing is configured to rotatably support a crankshaft.

A bicycle guard is provided that has a minimal number of parts required for mounting. A drive unit is provided with the bicycle guard. The bicycle guard includes a first attaching part and a housing. The first attaching part is configured to be attached to a first connection part that connects a bicycle frame. The housing is configured to rotatably support a crankshaft.

An apparatus including a bicycle frame including a drive side chain stay. The drive side chain stay can include a drive side chain stay chamber, an inside chain stay cutout, an outside chain stay cutout; and a dropout. The drive side chain stay can be configured such that a chain of a bicycle including the bicycle frame can be inserted through the inside chain stay cutout, the drive side chain stay chamber, and the outside chain stay cutout without breaking the chain.

An apparatus including a bicycle frame including a drive side chain stay. The drive side chain stay can include a drive side chain stay chamber, an inside chain stay cutout, an outside chain stay cutout; and a dropout. The drive side chain stay can be configured such that a chain of a bicycle including the bicycle frame can be inserted through the inside chain stay cutout, the drive side chain stay chamber, and the outside chain stay cutout without breaking the chain.

An apparatus including a bicycle frame including a drive side chain stay. The drive side chain stay can include a drive side chain stay chamber, an inside chain stay cutout, an outside chain stay cutout; and a dropout. The drive side chain stay can be configured such that a chain of a bicycle including the bicycle frame can be inserted through the inside chain stay cutout, the drive side chain stay chamber, and the outside chain stay cutout without breaking the chain.

A bicycle guard is provided that has a minimal number of parts required for mounting. A drive unit is provided with the bicycle guard. The bicycle guard includes a first attaching part and a housing. The first attaching part is configured to be attached to a first connection part that connects a bicycle frame. The housing is configured to rotatably support a crankshaft.

A bicycle guard is provided that has a minimal number of parts required for mounting. A drive unit is provided with the bicycle guard. The bicycle guard includes a first attaching part and a housing. The first attaching part is configured to be attached to a first connection part that connects a bicycle frame. The housing is configured to rotatably support a crankshaft.

A hub assembly comprises a hub axle, a hub shell, a sprocket support body, a first ratchet member, a second ratchet member, and a spacer. The spacer includes at least one base member and at least one axial projection. The at least one axial projection extends from the at least one base member in an axial direction. The at least one axial projection is at least partially provided between at least one first tooth and at least one second tooth in a circumferential direction. A first axial tooth-end is closer to an axial center plane of the hub assembly than a second axial tooth-end. The at least one base member of the spacer is disposed at a location closer to the first axial tooth-end than the second axial tooth-end.

A hub assembly comprises a hub axle, a hub shell, a sprocket support body, a first ratchet member, a second ratchet member, and a spacer. The spacer includes at least one base member and at least one axial projection. The at least one axial projection extends from the at least one base member in an axial direction. The at least one axial projection is at least partially provided between at least one first tooth and at least one second tooth in a circumferential direction. A first axial tooth-end is closer to an axial center plane of the hub assembly than a second axial tooth-end. The at least one base member of the spacer is disposed at a location closer to the first axial tooth-end than the second axial tooth-end.

A hub assembly comprises a hub axle, a hub shell, a sprocket support body, a first bearing unit, a second bearing unit, and a sleeve. The sleeve includes a first abutment portion and a second abutment portion. The first abutment portion abuts the first inner race. The second abutment portion abuts the second inner race in a radial direction.