A race car has only two main functions; to go as fast as possible without the driver losing control and not breaking down in the middle of a race. Racing is not something that has ever interested me, since it seems pretty boring unless there are accidents, and it seems morbid to be waiting for life threatening flips and crashes to happen. However, how these vehicles work is fascinating, and also often applies to the vehicles driven by the general public as well. How the speed from the transmission gets to the wheels is particularly fascinating since it actually does the opposite of what you would expect a race car to do. Reduction gears, which are a specific type of speed reducers, tone down the amount of power from the transmission so that the wheels are not overwhelmed with power. Although I would expect the power, which is also known as torque, to be able to come unhindered to the wheels for maximum speed, this would actually overwhelm and damage the car. The control supplied by reduction gears is vital for the proper speeds to be reached and controlled.
In general, reduction gears are two separate gears, each with teeth that resemble the classic crowns worn by renaissance kings, that are connected by these teeth and able to rotate together. Each of these gears is attached to another moving part, either the transmission shaft or the wheel shaft. Depending on how many teeth each gear has, the torque from the transmission is diluted down to a speed that the wheels can handle without burning out or falling off. Therefore, the speed of a car is controlled by the design of the reduction gears installed within. Race cars are able to handle more torque then regular cars driven by the general public, but are still limited by the reduction gears according to safety standards.