This is actually a mechanism affiliated to velocity which has been used in the automobiles particularly when a turn occurs.
There are main two wheel categories in automobile vehicles which are outer wheel and inner wheel. This component makes the outer feel to rotate faster than the inner wheel when the driver turns the car. How it works is when the vehicle turns the two wheels’ has to be in different speed otherwise the traction will not be carried out in a smooth way. So this particular part is making the wheels to rotate in the different speeds and prevent the tires from damages.