Abstract: A vehicle is described that allows an operator to adjust it specifically to fit the operator's desires. A seat can be adjusted for comfort and safety by adjusting distance from pedals, and a tilt relative to the frame. A particular seat cushion can also be adjusted to the particular desires of the rider. The relative movement of vehicle frame components when the vehicle is traveling over uneven terrain can be adjusted by adjusting a suspension dampener. The steering mechanism can be adjusted for a proper fit and comfort.

Abstract: A recumbent bicycle has a tubular frame member with a longitudinal axis running from front to rear. A rear support module includes a saddle for nestingly embracing a rear portion of the frame member. Cantilever support members extend downward from the saddle to free ends which are attached to an axle for a rear wheel. A head tube and bearing attached to the front of the frame member support a head shaft and a fork with a bifurcated lower portion suitable for mounting a front wheel. The fork lies generally in a plane and is supported, set forward of the head shaft, by extension plates such that the head shaft axis intercepts the fork plane. A drive sprocket assembly is at the front of the frame member. A seat assembly has opposing track slides engaging a track at the top of the frame member. The slides can be drawn together to clamp the track and fix the seat.