A human-powered vehicle comprising a structural frame, two front wheels mounted to a forward portion of the frame for rotation, a seat secured to the frame, the seat positioned between the front wheels and adapted to pivot about a seat pivot axis, and a steerable rear wheel mounted to the frame behind the seat and defining a rear wheel kingpin axis, the rear wheel operably linked to the seat such that pivoting of the seat about the seat pivot axis causes pivoting of the rear wheel about the kingpin axis to steer the vehicle.
A powered vehicle and method of operating is described for on and off-road use. The powered vehicle comprises a chassis and a first and second axle coupled to the chassis having at least one wheel coupled to the first axle and at least two wheels coupled to the second axle. The powered vehicle further comprises a movable seat configured to support a rider sitting down on the seat, and configured to move relative to the chassis in order to provide a steering mechanism for the powered vehicle. For example, the movable seat provides a mechanism for the rider to shift his or her weight relative to the chassis to cause the steering mechanism for the powered vehicle.
