All-terrain mobility scooters add knobby tires, robust motors, and enhanced ground clearance to take on gravel paths

https://mill-wiki.win/index.php/This_Is_The_History_Of_Compact_Mobility_Scooters

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