TrackMaster S1 series | All-Terrain Tracked WheelChair
Lasher Sport BT-ATB - all terrain, off road adventure! - Wheelchairs in Motion
TAKING OFF ROAD WHEELCHAIRS TO THE LIMIT!! (I got stuck!!) - YouTube
Chairs - Action Trackchair
Freedom Trax is the only powered-track device allowing manual wheelchairs off-road capability. Take it through the sand, snow, and gravel. - Compassion Mobility | Wheelchair Accessible Vans, Trucks & SUVs | Hand