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

https://www.4shared.com/office/xP8C3OMHge/pdf-42269-56115.html

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