The suspension connects the unsprung mass to the chassis and controls the tires contact with the ground through springs and dampers, making it highly related to car performance. The suspension is also responsible for transferring the forces from cornering, accelerating and braking into the chassis and thus needs to be stiff to keep the correct kinematics at all times. Therefore, close collaboration with vehicle dynamics is necessary, but also uprights, steering and monocoque. The design job includes FEA, motion studies and design of many interacting components.