Four-wheel steering system for vehicle

A four-wheel steering system for a vehicle comprising a front wheel steering mechanism for pivotally controlling front wheels in response to steering rotation of a steering wheel, and a rear wheel steering mechanism for pivotally controlling rear wheels, the rear wheel steering mechanism being capable of pivoting the rear wheels in a same phase direction relative to the front wheels when the steering wheel is rotated within a first angular range, wherein the rear wheel steering mechanism is further capable of holding the rear wheels substantially at a neutral pivotal position when the steering wheel is rotated within a second angular range which is beyond said first angular range, said second angular range extending from a neutral starting point to a neutral ending point which is spaced from the neutral starting point, the rear wheel steering mechanism causing the rear wheels to pivot in the opposite phase direction when the steering wheel is pivoted beyond the neutral ending point of said second angular range.