According to Official Guinness Records,
The fastest mobility scooter is 180.26 km/h (112 mph) and was achieved by GRIP – Das Motormagazin and driver Sven Ohler (both Germany) at the DEKRA Test Oval racetrack, in Klettwitz, Germany, on 25 May 2017.The record attempt was filmed for TV magazine GRIP on station RTL II.
For a complete list of 2017 records, please visit 2017 Guinness Records in Germany.