A vehicle with a power unit includes: a body frame with said power unit mounted to said body frame; at least one front wheel supported by the body frame in a front portion, and at least one rear wheel supported by the body frame in a rear portion; an electric machine capable of assisting said power unit; and an auxiliary power source electrically connected to said electric machine. The vehicle further includes a first set of foot pegs for a rider and a second set of foot pegs for a pillion. A quadrilateral region is defined between said first set of foot pegs and said second set of foot pegs, and said electric machine and said auxiliary power source are disposed substantially within said quadrilateral region when viewed from vehicle top.

A vehicle with a power unit includes: a body frame with said power unit mounted to said body frame; at least one front wheel supported by the body frame in a front portion, and at least one rear wheel supported by the body frame in a rear portion; an electric machine capable of assisting said power unit; and an auxiliary power source electrically connected to said electric machine. The vehicle further includes a first set of foot pegs for a rider and a second set of foot pegs for a pillion. A quadrilateral region is defined between said first set of foot pegs and said second set of foot pegs, and said electric machine and said auxiliary power source are disposed substantially within said quadrilateral region when viewed from vehicle top.

A seat for a bicycle comprising: a seating surface having a longitudinal length, a longitudinally forward portion, a longitudinally rearward portion, and a lateral width between a first lateral end and a second lateral end laterally opposed to the first lateral end; an underside surface below the seating surface; an opening extending through the seating surface and the underside surface; where the opening has an opening length between a longitudinally forward periphery and a longitudinally rearward periphery and an opening width between a first lateral periphery and a second lateral periphery laterally opposed to the first lateral periphery; where the seating surface includes a bridge portion longitudinally located between the opening and the rearward portion of the seating surface; and where the opening has a lateral width greater than its longitudinal length.

A pedal-powered wheelchair having a steering dolly pivotally mounted at a rear of the wheelchair. When the upper end of a first steering lever is pulled and the upper end of a second steering lever is pushed, a first steering linkage connected to the first steering lever pulls forward a first side of the steering dolly and a second steering linkage connected to the second steering lever pushes rearward a second side of the steering dolly. This causes the steering dolly to turn clockwise to initiate a left turn. When the upper end of the first steering lever is pushed and the upper end of the second steering lever is pulled, the first steering linkage pushes rearward the first side of the steering dolly and the second steering linkage pulls forward the second side of the steering dolly. This causes the steering dolly to turn counterclockwise to initiate a right turn.

A pedal-powered wheelchair having a steering dolly pivotally mounted at a rear of the wheelchair. When the upper end of a first steering lever is pulled and the upper end of a second steering lever is pushed, a first steering linkage connected to the first steering lever pulls forward a first side of the steering dolly and a second steering linkage connected to the second steering lever pushes rearward a second side of the steering dolly. This causes the steering dolly to turn clockwise to initiate a left turn. When the upper end of the first steering lever is pushed and the upper end of the second steering lever is pulled, the first steering linkage pushes rearward the first side of the steering dolly and the second steering linkage pulls forward the second side of the steering dolly. This causes the steering dolly to turn counterclockwise to initiate a right turn.

A bicycle saddle can be customized to a rider's body to achieve desired support and comfort. The support shell is configured to support a rider's body and can be heated by an external heater and/or at least one internal thermal element operable to heat the bicycle saddle such that the saddle is molded to the rider.

Embodiments of the invention provide a customizable bicycle saddle for a bicycle. The bicycle saddle has been designed to allow it to be adjusted to match the ischial tuberosities of each rider's pelvis in order to minimize the pressure placed on other portions of the rider's body while seated on the bicycle. The bicycle saddle comprises a first seating portion that has been configured to allow a rider to sit on the bicycle, a second seating portion that has been configured to allow the rider to sit on the bicycle. The bicycle saddle also includes a first adjustment means configured to allow the first seating portion to be moved closer to the second seating portion, and a second adjustment means configured to allow the saddle to be moved closer to a forward portion on the bicycle.

A seat for a pedal-powered vehicle includes a support frame, a left seat element, a right seat element, and a nose. The left and right seat elements and the nose are implemented as separate components supported by the support frame. The two seat elements support a seated rider's weight while the nose does not. The seat elements and the nose form a gap below the seated rider's perineum area. The seat elements pivot forwards and backwards when the seated rider is pedaling. The seat elements counter-pivot when the seated rider is pedaling. Each seat element includes a concave surface that supports the seated rider.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.