The invention provides a vehicle drivable in use by a person walking or running while seated comprising: a frame; a large diameter front wheel non-steerable with respect to the frame, a seat for supporting a user's weight while walking or running, the frame configured to carry the seat suspended on the front wheel, a small diameter, steerable rear wheel journalled to the frame at a steering pivot axis, the seat being rotatable forwardly with respect to the front wheel and comprising a seat base for supporting a user and further comprising a backrest for engaging the user's back in use. The large front wheel may be of approximate diameter of a user's leg (typically an adult human), thus the large front wheel may be of similar size to a bicycle wheel for the user.