The invention relates to a propulsion system (1) for a pedal vehicle. The propulsion system (1) comprises a power unit (1) allowing the power originating from a bottom-bracket axle (2) to be combined with the power from two motors (40, 50), a first deformable transmission element (23) allowing the transmission of power to the rear wheel (73) and a casing assembly (19) enclosing particularly the first deformable transmission element (23) and the power unit (1), with the exception of part of the bottom-bracket axle (2).

A riding vehicle includes: a main body supporting a wheel and on which a steering stay and a seat stay are erected at an interval in a traveling direction; a handle provided on the steering stay; a pedestal portion fixed to an upper end of the seat stay; a seat rotatably connected to the pedestal portion, and configured to switch between a riding state where the seat stands upright to cover the pedestal portion from above so as to be in an arrangement suitable for riding and a cart state where the seat is inclined in a traveling direction away from the steering stay to open an upper portion of the pedestal portion so as to be in an arrangement suitable for conveyance movement with baggage placed thereon; and a stopper interposed between the pedestal portion and the seat and regulating the seat in the riding and cart states.

Embodiments disclosed herein include an electric assist bicycle adapted for a both personal and public use, and subcomponents of the bicycle. The electric assist bicycle can include a hollow frame with one or more cables routed within the hollow frame. The hollow frame can be configured with an internal battery compartment. The electric assist bicycle can further include a modular electronic locking system.

Embodiments disclosed herein include an electric assist bicycle adapted for a both personal and public use, and subcomponents of the bicycle. The electric assist bicycle can include a hollow frame with one or more cables routed within the hollow frame. The hollow frame can be configured with an internal battery compartment. The electric assist bicycle can further include a modular electronic locking system.

A bicycle includes a frame, a motor, a battery, and a key interface. The frame includes a head tube, a down tube coupled to the head tube, a central hub coupled to an end of the down tube opposite the head tube and defining an internal cavity, and a mount positioned at least partially directly underneath the internal cavity. The motor is coupled to the mount such that the motor is positioned at least partially underneath the internal cavity. The battery extends at least partially into the internal cavity of the central hub and positioned at least partially directly above the motor. The battery is configured to power the motor. The key interface is supported by the mount. Engaging the key interface releases the battery to facilitate removing the battery from the frame.

A bicycle includes a frame, a motor, a battery, and a key interface. The frame includes a head tube, a down tube coupled to the head tube, a central hub coupled to an end of the down tube opposite the head tube and defining an internal cavity, and a mount positioned at least partially directly underneath the internal cavity. The motor is coupled to the mount such that the motor is positioned at least partially underneath the internal cavity. The battery extends at least partially into the internal cavity of the central hub and positioned at least partially directly above the motor. The battery is configured to power the motor. The key interface is supported by the mount. Engaging the key interface releases the battery to facilitate removing the battery from the frame.

A bicycle includes a chainstay protector having an upper surface including a valley, a first peak, and a second peak. The first peak extends upwardly from the valley toward the chain and has a first contact surface positioned to contact the chain a first height above the valley. The second peak extends upwardly from the valley toward the chain and has a second contact surface positioned to contact the chain a second height above the valley. The first contact surface is spaced from the second contact surface by a gap that is at least 5 times the first height. Each of the first and second contact surfaces has a length that is less than the length of the gap and less than two times a pitch of the chain.

A bicycle includes a chainstay protector having an upper surface including a valley, a first peak, and a second peak. The first peak extends upwardly from the valley toward the chain and has a first contact surface positioned to contact the chain a first height above the valley. The second peak extends upwardly from the valley toward the chain and has a second contact surface positioned to contact the chain a second height above the valley. The first contact surface is spaced from the second contact surface by a gap that is at least 5 times the first height. Each of the first and second contact surfaces has a length that is less than the length of the gap and less than two times a pitch of the chain.

A snowmobile tunnel stop protection system to provide protection to a tunnel from a studded endless track used on a snowmobile. The tunnel includes at least one slot formed into an undersurface of the tunnel. At least one protection rail extends from a first end to a second end and includes a plurality of holes passing through the protection rail. A plurality of fasteners are used to attach the protection rail to the tunnel where each fastener has a first fastener portion that passes through the at least one slot. Each fastener includes the first fastener portion that passes through one of the plurality of holes and a second fastener portion that couples to the corresponding first fastener portion to couple the protection rail to the slot formed in the tunnel.

A snowmobile tunnel stop protection system to provide protection to a tunnel from a studded endless track used on a snowmobile. The tunnel includes at least one slot formed into an undersurface of the tunnel. At least one protection rail extends from a first end to a second end and includes a plurality of holes passing through the protection rail. A plurality of fasteners are used to attach the protection rail to the tunnel where each fastener has a first fastener portion that passes through the at least one slot. Each fastener includes the first fastener portion that passes through one of the plurality of holes and a second fastener portion that couples to the corresponding first fastener portion to couple the protection rail to the slot formed in the tunnel.