Steering rods - steering trapezoid. As already known, so that the car can curve sideways without skidding (undesirable due to the possibility of the vehicle shedding and premature wear of the tires, The steering system should position the steered wheels in such a way as to ensure their rolling along curves with a common center of curvature, lying on the extension of the axis of rotation of the rear wheels of the car. This condition is met by linking the steering rods in the so-called. steering trapezoid. They constitute this trapezoid: the front axle of the vehicle, transverse rod and steering knuckle levers. In results of that, that the distance of the vertices of the trapezoid A and B lying on the transverse rod is smaller than the distance of the vertices C and D lying on the front axis, the condition for the turning of the inner wheel to be greater than that of the outer wheel is always met. As the right wheel continues to turn to the right, the cross bar shifts only slightly to the left. Thus, the turn of the left wheel will be smaller than that of the right wheel. The front wheels of the vehicle will behave in the same way when turning in the opposite direction.