sentences:  The large wheels with large, low-pressure tires were mounted without any suspension or steering mechanism, greatly simplifying the design.In order to keep the wheels on the ground on uneven terrain, the front and rear units could not only swivel around a vertical axis, but also along the vehicle's longitudinal axis, allowing significant articulation.In low gear ranges, the Goer had four-wheel drive capability, but on-road it was purely front-wheel drive.