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

https://www.scribd.com/document/1054199160/5-Laws-Anyone-Working-In-Mobility-Scooter-Should-Know-141414

All-terrain mobility scooters add knobby tires, robust motors, and enhanced ground clearance to tackle gravel paths, grass, and moderate off-road surfaces.