Abstract: Separate vehicle into two parts, both could be suffer from the force of centrifugal, and shifting outward to the direction of centrifugal force. However, because of these two parts are connected into together as two opposite sides of a seesaw by rods means and pivots means, after push and pull with each other, only the part with larger momentum shift outward, the other part suffer from the momentum transfer from the tie rods means, has to shift inward. From proper setting, could gain the shape of tilting inward. Hence, the major advantage is without any hydraulic or electric system to tilt, could reach the cost down, better fuel efficiency, larger space and maintenance free benefits.