The tilt of the kingpin. The tilt of the steering pin reduces the swing radius and facilitates the self-return of the steering wheel to straight-ahead driving. The smaller the swing radius, the easier it is to turn the steering wheel and the less impact on the steering system, caused by hitting the road with rolling wheels. The wobbling radius is the distance between the center of the tire tread and the point of contact with the road of the line constituting the extension of the axis of the steering knuckle pin.. The distance is measured in millimeters with the maximum permissible load on the car and the positioning of the wheels straight ahead. The smaller the swing radius, the easier the wheel can be turned sideways. However, the sway radius cannot be completely eliminated, because in that case the wheel would be turned in place, which would make steering a lot more difficult.