Abstract: A steering wheel mechanism in which independent front and rear steering is obtained by weight shifting. A pair of rocker members are pivotally mounted below the front and rear ends of a platform. A pair of spindles are pivotally mounted on king pins at opposite sides of each rocker member, and wheels are mounted on each of the spindles. Pitman arms are interconnected between mid-portions of each frame and steering arms which project from the spindles. Provision is made for changing steering response and for adjusting toe-in.