A vehicle includes a frame; two front ground-engaging members connected to the frame; a rear ground-engaging member connected to the frame; an engine supported by the frame; a powertrain operatively connecting the engine to the rear ground-engaging member; a seat connected to the frame; an exhaust system connected to the engine and supported by the frame; a swing arm operatively connecting the rear ground-engaging member to the frame; and a rear suspension operatively connected between the swing arm and the frame. The seat is positioned at least partially above the swing arm. The exhaust system is positioned at least partially below the swing arm. Each of the rear suspension and the powertrain is at least partially concealed by the swing arm from at least two of a top, a left side or a right side of the vehicle.

A vehicle includes a frame; two front ground-engaging members connected to the frame; a rear ground-engaging member connected to the frame; an engine supported by the frame; a powertrain operatively connecting the engine to the rear ground-engaging member; a seat connected to the frame; an exhaust system connected to the engine and supported by the frame; a swing arm operatively connecting the rear ground-engaging member to the frame; and a rear suspension operatively connected between the swing arm and the frame. The seat is positioned at least partially above the swing arm. The exhaust system is positioned at least partially below the swing arm. Each of the rear suspension and the powertrain is at least partially concealed by the swing arm from at least two of a top, a left side or a right side of the vehicle.

A transmission shaft of an electric vehicle comprises a transmission rod, a five-way base and a rear gearbox. The five-way base comprises a five-way base body, a five-way base cylinder, a left lock ring, and a right cover. The five-way base cylinder is sleeved on the outer peripheral surface of the five-way base body. The left lock ring and the right cover are connected to both ends of the five-way base body by threads. Both ends of the mandrel protrude from the left lock ring and the right cover, respectively, and a five-way gear is sleeved on the surface of the mandrel The five-way gear is rotatably connected to the five-way base body and is meshed with a front transmission gear. The inner peripheral surface of the five-way gear is provided with ratchet teeth.

A bicycle includes a bicycle body, a bicycle component, and a battery. The bicycle body has a frame including a down tube, a component mounting portion, and a seat tube. The bicycle component includes a bicycle drive unit. At least a portion of the bicycle component is arranged inside the frame. The battery is mounted on the bicycle to supply the bicycle component with electrical power. The battery has an elongated shape. One end of the battery is entirely accommodated in the down tube, and another end of the battery is disposed outside the down tube.

A bicycle includes a bicycle body, a bicycle component, and a battery. The bicycle body has a frame including a down tube, a component mounting portion, and a seat tube. The bicycle component includes a bicycle drive unit. At least a portion of the bicycle component is arranged inside the frame. The battery is mounted on the bicycle to supply the bicycle component with electrical power. The battery has an elongated shape. One end of the battery is entirely accommodated in the down tube, and another end of the battery is disposed outside the down tube.

A position adjusting arrangement for use in a vehicle includes a seat for supporting a rider, a rear wheel and a front wheel, a steering arrangement including a handle bar for allowing the rider to control the steerable wheel, and a hub for interconnecting the components of the wheeled vehicle. The position adjusting arrangement includes an adjustable seat support arrangement movably connected to the hub, an adjustable handle bar support arrangement movably connected to the hub, and a releasable position locking arrangement configured to lock the position of the components of the vehicle relative to the hub. The hub may include a first portion and second portion, wherein the first and second portions are moveably connected to one another, such as by pivoting, sliding, or a combination of pivoting and sliding.

A position adjusting arrangement for use in a vehicle includes a seat for supporting a rider, a rear wheel and a front wheel, a steering arrangement including a handle bar for allowing the rider to control the steerable wheel, and a hub for interconnecting the components of the wheeled vehicle. The position adjusting arrangement includes an adjustable seat support arrangement movably connected to the hub, an adjustable handle bar support arrangement movably connected to the hub, and a releasable position locking arrangement configured to lock the position of the components of the vehicle relative to the hub. The hub may include a first portion and second portion, wherein the first and second portions are moveably connected to one another, such as by pivoting, sliding, or a combination of pivoting and sliding.

A gear shifting system includes a drive shaft, a face gear, and at least one power transmission component(s). The gear system also includes a pinion gear assembly, which is coupled to the first end of the drive shaft. The pinion gear assembly is configured to mesh with one of the concentric gear-rings on the face gear, so that the rotational movement of the gear-ring is transmitted to the shaft. The gear shifting system is easy to operate, mechanically simple, can smoothly shift between gears under any gear shifting conditions, and exhibits decreased component wear.

A gear shifting system includes a drive shaft, a face gear, and at least one power transmission component(s). The gear system also includes a pinion gear assembly, which is coupled to the first end of the drive shaft. The pinion gear assembly is configured to mesh with one of the concentric gear-rings on the face gear, so that the rotational movement of the gear-ring is transmitted to the shaft. The gear shifting system is easy to operate, mechanically simple, can smoothly shift between gears under any gear shifting conditions, and exhibits decreased component wear.

A swing arm structure for a saddle riding electric vehicle includes a swing arm pivotably supported by a vehicle body frame at a pivot section and extending rearward from the pivot section to rotatably support a rear wheel, an electric motor that drives the rear wheel, and a speed reduction mechanism that reduces an output of the electric motor and transmit the output to the rear wheel, and a housing installed separately from the swing arm and attached to the swing arm, wherein the speed reduction mechanism and the housing are configured as a speed reduction mechanism unit in which the speed reduction mechanism is attached to the housing and integrated with the housing.