Originally Posted by
tonic
Not the case with independent trailer suspension. They work on two A Frames, one each side of the trailer. The forces work verticle inside the sping or air bag. The point of the A holds the axle and spring or air bag. So when the wheel is pushed up the force goes up behind the wheel straight up to the chassis through the spring or air bag at the wheel point. This pushes the trailer chassis up at the wheel thus lifting the trailer. The pivot point, the base of the A just holds the suspension in place and allows the movement of the spring or air bag.