This video is about Super Kart racing. The karts are 100 horsepower race karts with high power to weight and downforce. They are small yet rapid, holding several outright lap records and being faster than Formula 1 cars around some circuits. They have 250cc engines, a quarter of a litre, yet produce 100 horsepower. They are inline twins and water-cooled 2-stroke engines, with a large radiator behind the driver. Being two-stroke they can make that power with smaller displacement because the engine fires twice as often. The engines rev to 14 thousand rpm and run through 5 or 6 speed gearboxes. A rental kart of similar weight often has 5 to 10 horsepower, while this has one hundred. They do not only brake the rear axle. Similar to higher levels of karting, they have a disc on each corner and super sticky slick tyres with a similarly soft compound to Formula 1 tyres.