Wheelbase
Distance between the center line of the front wheels and the center line of the rear wheels. Adjusting this value can influence road performance to a considerable degree. For example, the wheelbase can be altered by changing the construction of the suspension arms or by inserting a distancing piece between the engine and the gearbox.
Longer wheel base is better for straits and long fast corners. With this adjustements you can improve aerodynamics of the car. Long wheelbase car is not so suitable for fast cornering.
Shorter wheelbase car have improved drivability, can allow fast cornering, but can suffer a small aerodynamic problems. Designers have to find right compromise, as always.
