Component parts of a weight-distributing hitch system. The spring bars are installed and tensioned in such a manner as to distribute a portion of the trailer's hitch weight to the front axle of the tow vehicle and to the axles of the trailer.

A spring bar is a spring-loaded bar that attaches a strap to a watch's case.

Key component of a weight-distributing hitch system. Spring bars work to distribute trailer tongue loads to the tow vehicle forward axle.

this extends the width of the door, sitting above the door and going through the center of the Spring(s).