A bicycle front shifting system includes operable to transmit a wireless signal, a crank assembly with two crank arms and a pedal on each of the two crank arms. The crank assembly is rotatable about a rotation axis. A front shift unit is coupled to the crank assembly and is rotatable about the rotation axis. The front shift unit includes a chain ring component with a big chain ring and a small chain ring. The small chain ring has a small diameter and the big chain ring has a big diameter that is larger than the small diameter. A shift mechanism is coupled to and rotatable with the chain ring component about the rotation axis. The shift mechanism is configured to receive the wireless signal from the shifter and to shift a chain between the big chain ring and the small chain ring according to the wireless signal.

A bicycle chain device that includes a mounting bracket configured to be affixed to a bicycle. The bicycle has a solitary bicycle front sprocket. A cage is movably mounted to the mounting bracket so that the cage is positioned adjacent to the front sprocket. The cage has a chain-receiving slot, through which a bicycle chain passes. The cage is configured to move in accordance with a shifting operation of a bicycle rear derailleur to maintain alignment with a chain to prevent the chain from falling off the sprocket.

A bicycle chain device that includes a mounting bracket configured to be affixed to a bicycle. The bicycle has a solitary bicycle front sprocket. A cage is movably mounted to the mounting bracket so that the cage is positioned adjacent to the front sprocket. The cage has a chain-receiving slot, through which a bicycle chain passes. The cage is configured to move in accordance with a shifting operation of a bicycle rear derailleur to maintain alignment with a chain to prevent the chain from falling off the sprocket.

A chainring includes a first chainring segment and a second chainring segment for a chainring arrangement of a bicycle. Further provided is a chainring arrangement and a drive arrangement for a bicycle with at least one chainring. The segmented chainring arrangement is particularly suitable for bicycles with only one front chainring.

A bicycle crank assembly includes a sprocket having a rotational center axis, a crank, a crank axle and a slide mechanism. The crank axle is attached to the crank and includes an internal space. The slide mechanism is configured to displace the sprocket relatively to the crank in an axial direction parallel to the rotational center axis. At least part of the slide mechanism is disposed in the internal space of the crank axle.

The invention discloses a gear shift arrangement, which includes a sprocket cassette being adapted to be slidably mounted on a hub which is adapted to move on a horizontal axis of a spindle, the sprocket cassette further being adapted to operatively engage with a chain so that, in operation, the chain remains in one vertical plane; and movement means adapted to move the sprocket cassette along the hub transversely relative to the chain.

The invention discloses a gear shift arrangement, which includes a sprocket cassette being adapted to be slidably mounted on a hub which is adapted to move on a horizontal axis of a spindle, the sprocket cassette further being adapted to operatively engage with a chain so that, in operation, the chain remains in one vertical plane; and movement means adapted to move the sprocket cassette along the hub transversely relative to the chain.

A narrow-profile straddle-type motorized snow vehicle specially configured and adapted for traversing inclined mountain slopes, having a continuously variable transmission (CVT), the primary and secondary pulleys thereof mounted rearwardly of the motor and not on the side of the motor to thereby reduce the width of the vehicle in the critical region between the operator's legs where the engine is located and typically straddled by the operator. A single ski is further provided to utilize the narrow profile of the vehicle in the region of the operator's legs, which in conjunction with the re-configured positioning of the vehicle CVT transmission allows the operator to better lean the vehicle when traversing an inclined slope and be able to simultaneously avoid contact with the up slope and/or snow thereon by protruding legs or transmission components which would otherwise impede passage of the vehicle across an inclined slope.

A narrow-profile straddle-type motorized snow vehicle specially configured and adapted for traversing inclined mountain slopes, having a continuously variable transmission (CVT), the primary and secondary pulleys thereof mounted rearwardly of the motor and not on the side of the motor to thereby reduce the width of the vehicle in the critical region between the operator's legs where the engine is located and typically straddled by the operator. A single ski is further provided to utilize the narrow profile of the vehicle in the region of the operator's legs, which in conjunction with the re-configured positioning of the vehicle CVT transmission allows the operator to better lean the vehicle when traversing an inclined slope and be able to simultaneously avoid contact with the up slope and/or snow thereon by protruding legs or transmission components which would otherwise impede passage of the vehicle across an inclined slope.

A transmission system for a bicycle, wherein the system comprises a driver element configured and arranged to rotate about an axis. The transmission system comprises a cassette of sprockets mounted on the driver element to rotate together. The transmission system comprises a shifting unit arranged to move the cassette of sprockets in axial direction on the driver element. The shifting unit comprises an actuator element arranged to actuate the movement of the cassette of sprockets on the driver element. The actuator element is at least partially positioned between the driver element and the axis, and/or the actuator element is at least partially positioned in axial direction next to the driver element.