The control centre of the racing car. Has long been more than just the part that steers the vehicle. All the important buttons and control devices are mounted on it. The appearance and arrangement can vary from driver to driver.
The round thing you hold in your hands and rotate left or right to steer the kart. Duh! A padded steering wheel is preferred, since otherwise the vibrations can really get to you. Various displays are typically mounted to it.
A steering wheel is a type of steering control used in most modern land vehicles, including all mass-production automobiles. The steering wheel is the part of the steering system that is manipulated by the driver; the rest of the steering system responds to the movements of the steering wheel. This can be through direct mechanical contact in rack and pinion steering, with the assistance of hydraulics in power steering, or in some concept cars and modern production cars such as the Toyota Prius entirely through computer control.