Open-wheel car

Open-wheel cars licensed for use on public roads (street legal), such as the Ariel Atom, are uncommon, as they are often impractical for everyday use.

[2] After working as a mechanic in the automotive industry, Harroun began competitive professional racing in 1906, winning the AAA National Championship in 1910.

He was then hired by the Marmon Motor Car Company as chief engineer, charged with building a racecar intended to race at the first Indianapolis 500, which he went on to win.

Depending on the rules of the class, many types of open-wheelers have wings at the front and rear of the vehicle, as well as a very low and virtually flat undertray that helps achieve additional aerodynamic downforce pushing the car onto the road.

However, most open-wheel races are on dedicated road courses, such as Watkins Glen in the US, Nürburgring in Germany, Spa-Francorchamps in Belgium and Silverstone in Great Britain.

Other asphalt modified series race on short tracks in the United States and Canada, such as Wyoming County International Speedway in New York.

At Autodromo Nazionale Monza, Antônio Pizzonia of BMW Williams F1 team recorded a top speed of 369.9 kilometres per hour (229.8 mph) (over 102 m/s) in the 2004 Italian Grand Prix.

[8] It is difficult to give precise figures for the absolute top speeds of Formula One cars as the data are not generally released by teams.

The 'speed traps' on fast circuits such as Monza give a good indication, but are not necessarily located at the point on the track where the car is travelling at its fastest.

[9] Even on tight non-oval street circuits such as the Grand Prix of Toronto, open-wheel Indy Cars attain speeds of 190 miles per hour (310 km/h).

Despite initial criticism, including for the reason of obstructing the driver's vision, it gained some praise in the Formula 2 sprint race in Catalunya when Nirei Fukuzumi spun and had the back of his car land on fellow countryman Tadasuke Makino's halo.

At the start of the 2020 Bahrain Grand Prix, Romain Grosjean collided with Daniil Kvyat in which his car broke in two and burst into flames as it split the barrier.

A Ford Model T , one of the most popular road-legal cars of the early 20th century. Note how the wheels are well outside the main body of the car, as was typical for the era.
A 1954 Mercedes-Benz 300 SL which featured wheels under the main body of the vehicle, primarily for aerodynamic drag reduction