All-terrain mobility scooters add knobby tires, robust motors, and boosted ground clearance to take on gravel paths

https://www.4shared.com/office/OPaBGK6Bfa/pdf-39048-98576.html

All-terrain mobility scooters include knobby tires, robust motors, and enhanced ground clearance to take on gravel paths, yard, and moderate off-road surface areas.