A bicycle electrical unit is provided for a bicycle crank assembly. The bicycle electrical unit includes a housing, a wireless communication unit and a charge receiver port. The housing is mounted on a crank arm. The wireless communication unit is enclosed in the housing. The charge receiver port is provided on the housing.

A mountain bike comprises: —a frame (10);—a rear wheel (2) having its axle mounted in rear dropouts (16) of the frame;—a front wheel (3) having its axle mounted in front dropouts (18) of the frame;—a pedal set (20) comprising a spindle mounted for rotation in a bottom bracket shell (19) of the frame, two cranks (22) mounted at the opposite ends of the spindle, and two pedals (21) mounted for rotation at the free ends of the respective cranks; wherein each crank (22) has a crank length L of 164 mm or less; wherein the bottom bracket shell (19) has a Practical Bracket Height PBH of 294 mm or less, wherein PBH=BH−β.Math.(α.Math.FST+(1−α).Math.RST), wherein BH indicates bracket height, FST indicates Front Suspension Travel, and RST indicates Rear Suspension Travel.

A chainless bicycle for child includes a frame and a power gearing device. The frame has a seat tube between the front wheel and the rear wheel, with a passive gear axially disposed on a hub of the rear wheel. The power gearing device is disposed on the frame between the seat tube and the rear wheel. The power gearing device includes an active gear and a transmission gear meshed with the active gear. The transmission gear is meshed between the active gear and the passive gear. The power gearing device further includes a crank set disposed on two sides of the active gear for driving the active gear to rotate. Therefore, the passive gear is driven through the transmission gear to rotate in an identical direction with the active gear. Thus, the meshing structure of the present invention improves the safety of children.

A bicycle with removable battery for supplying power to electric components, comprising a frame composed of an upper tube connected with a front oblique tube and with a rear vertical tube, which in turn are connected in a lower region so as to form a seat for a bottom bracket and with which a pair of horizontal rear chainstays and a pair of oblique rear chainstays are coupled. The front oblique tube has an axial seat for a removable battery and for accommodating connection and/or electric power supply cables. The axial seat has an axis that passes above the bottom bracket and a lower end that is open and located at the interspace between the pair of horizontal rear chainstays.

A battery holder is formed separately from a frame of a human-powered vehicle. The battery holder comprises a battery attachment portion and at least one drive unit connection portion. A battery unit is configured to be attached to the battery attachment portion by a threaded member in a removable manner. The at least one drive unit connection portion is configured to be connected to a drive unit that rotatably supports a crank axle of the human-powered vehicle.

A bicycle comprises front and rear wheels, a frame supported on the front and rear wheels and including a frame mount, and a battery including a battery mount engaged with the frame mount. One of the battery mount and the frame mount includes a depression and the other of the battery mount and the frame mount includes a boss positioned in the depression. Preferably, depression comprises a slot, and the slot can include a resilient material to securely hold the boss. The boss can comprise an eccentric boss. Preferably, the battery mount is positioned adjacent one end of the battery, and an opposite end of the battery includes an opening. In this embodiment, the bicycle further comprises a mounting pin positioned through the opening and through a portion of the frame to secure the opposite end of the battery to the frame.

A bicycle comprises front and rear wheels, a frame supported on the front and rear wheels and including a frame mount, and a battery including a battery mount engaged with the frame mount. One of the battery mount and the frame mount includes a depression and the other of the battery mount and the frame mount includes a boss positioned in the depression. Preferably, depression comprises a slot, and the slot can include a resilient material to securely hold the boss. The boss can comprise an eccentric boss. Preferably, the battery mount is positioned adjacent one end of the battery, and an opposite end of the battery includes an opening. In this embodiment, the bicycle further comprises a mounting pin positioned through the opening and through a portion of the frame to secure the opposite end of the battery to the frame.

A bottom bracket having a shaft having a longitudinal axis (X), first and second adapters radially outside of the shaft and associated with respective ends of a bottom bracket housing. Rolling bearings are radially interposed between the shaft and the first adapters with axial locking members axially outside the rolling bearings and in axial abutment on the first and second slewing bearings. A protective screen, positioned between a selected adapter and a radially outer surface of the associated axial locking members in the axial direction and at least partially outside of the first adapter, is fixedly connected to the selected adapter and comprising a sealing member arranged in sliding contact on the radially outer surface of the associated axial locking members.

A bottom bracket having a shaft having a longitudinal axis (X), first and second adapters radially outside of the shaft and associated with respective ends of a bottom bracket housing. Rolling bearings are radially interposed between the shaft and the first adapters with axial locking members axially outside the rolling bearings and in axial abutment on the first and second slewing bearings. A protective screen, positioned between a selected adapter and a radially outer surface of the associated axial locking members in the axial direction and at least partially outside of the first adapter, is fixedly connected to the selected adapter and comprising a sealing member arranged in sliding contact on the radially outer surface of the associated axial locking members.

A crankset for a bicycle comprising a shaft rotationally engaged with a bicycle frame, the shaft having a radially extending flange disposed toward one end, a first crank arm and a second crank arm, and each connected to an opposing end of the shaft and being approximately 180 degrees out of phase with each other, a first sprocket keyed to the shaft, the first sprocket having a toothed belt engaging surface, and a spacer member disposed between the first sprocket and the flange for adjusting a first sprocket position.