the chassis frame has five cross members and the frame is deep and as rigid as possible. the front axle has an h section with rectangular ends for torsional stress. "duo-servo" 4-wheel brakes are bendix design operating, after two primary rods, by enclosed cables on drums. the springing is half-elliptical on both axles and they are controlled by double-acting hydraulic shock absorbers. the rear under-hung springs are long. steering is by a worm and nut design. the cars are supplied with artillery wheels and a fixed roof, wire wheels and a sunshine roof are optional extras.