Top of the range large 8mph mobility scooters, otherwise known as Class 3 mobility scooters or Heavy Duty mobility scooters, are ideal for longer ranges and will accomodate rough terrain. The performance mobility scooter will travel at 4mph and can, at the press of a button, increase the speed to 8mph. Road use of this class of mobility scooter is possible, although it is worth noting that 4mph is the legal speed for pavement use. The DVLA have instructed that vehicle registration applies to all 6 and 8mph mobility scooters, however there is no charge levied for this.