That particular Reese hitch works like any other weight distributing hitch, and as far as sway control is concerned, works on friction like the Equalizer hitch, and so depends on tongue weight. It would not work well in the anti-sway department with a trailer of low tongue weight, as I understand it. I've not used one, but it is an interesting concept and deviation from Reese's usual aproach to sway control.
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