All-terrain mobility scooters add knobby tires, robust motors, and boosted ground clearance to tackle gravel courses

https://www.4shared.com/office/BBWRh1RLfa/pdf-88053-81436.html

All-terrain mobility scooters add knobby tires, robust motors, and boosted ground clearance to take on gravel paths, turf, and moderate off-road surfaces.