Additionally, due to the high average take-off speed of 250 miles per hour (400 km/h), Concorde needed upgraded brakes. Like most airliners, Concorde has anti-skid braking – a system which prevents the tyres from losing traction when the brakes are applied for greater control during roll-out. The brakes, developed by Dunlop, were the first carbon-based brakes used on an airliner.[148] The use of carbon over equivalent steel brakes provided a weight-saving of 1,200 lb (540 kg).[149] Each wheel has multiple discs which are cooled by electric fans.