All-terrain mobility scooters include knobby tires, robust motors, and boosted ground clearance to deal with gravel paths

https://www.4shared.com/office/j_4kNFqnge/pdf-10735-7912.html

All-terrain mobility scooters include knobby tires, robust motors, and enhanced ground clearance to tackle gravel courses, turf, and mild off-road surfaces.