Abstract: A longitudinally extending track assembly connects the inboard side of the seat bottom frame to the vehicle body for fore and aft adjusting longitudinal movement and supports the seat bottom frame at at least two longitudinally spaced points to support the seat bottom frame against forward and rearward pitching movement. A longitudinally extending outboard track member is mounted on the vehicle body adjacent the outboard side of the seat bottom frame. A one-point track engaging means carried by the seat bottom frame is slidably interengaged in the track member to support the outboard side of the seat bottom frame for fore and aft sliding movement. The one-point track engaging means is located forwardly of the rearward portion of the seat bottom frame so that the outboard side of the seat bottom frame is cantilevered rearwardly of the outboard track member when the seat is adjusted full rearwardly and is spaced above the vehicle body floor.