Pin inclination is the angle,which is formed by the line passing through the kingpin and the perpendicular to the ground, looking at the vehicle from the front. It is measured in degrees
When wheel turns, this inclination raises the vehicle. Which exerts a force on the wheels to straighten up automatically after completing its turn .
This inclination should be equal on both sides. In case it is greater on one side, the vehicle will be pulled to the side having the greater angle.