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

https://wiki-net.win/index.php/Five_Lessons_You_Can_Learn_From_Mobility_Scooter_Dealers

All-terrain mobility scooters add knobby tires, robust motors, and boosted ground clearance to deal with gravel paths, lawn, and moderate off-road surfaces.