The top speed and max range vary greatly and is affected by- - Riding under restricted speed (25km/h) or unrestricted speed. - Load weight/riders weight - Terrains  and sealed surfaced and roads - Air temperature and weather conditions - Tyre pressure and tyre wear and tyre type/design - Battery percentage remaining and Battery age/life - Riding in Single or Dual motor mode. - Riding uphills or flat surfaces All stated range and top speed are tested by the manufacturers under controlled conditions with a 60kg weight load (load on the scooter) on flat concrete surface with an air temperature of 24 degrees C. under restricted speed (20-25km/h), low humidity with the battery fully charged.