Abstract: A road vehicle, particlarly a human-powered type, comprises a rotatable chassis section rotatable with respect to a fixed chassis section, a steering mechanism and a banking mechanism controlled by the steering mechanism for automatically rotating the rotatable chassis section with respect to the fixed chassis section about the horizontal axis whenever the steering mechanism is actuated to steer the vehicle. The vehicle also comprises a novel hydraulic shock absorber and a novel hydraulic rear-wheel suspension, both of which are influenced, e.g., stiffened or loosened, according to the load applied to the vehicle.