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

https://blogfreely.net/reiddarfcp/10-meetups-about-cheapest-mobility-scooters-you-should-attend

All-terrain mobility scooters add knobby tires, robust motors, and improved ground clearance to take on gravel courses, yard, and mild off-road surfaces.