here is what i've seen in a few different places.. look into it.. just want you to be safe man..
QuoteTongue weight: the amount of the trailer's weight that is borne by the trailer hitch. Ideally, this should be about 10 percent of the total trailer weight. Too much tongue weight will make your vehicle's steering less responsive. Too little and the trailer might sway. Tongue weight can be measured using a specialized scale (available at trailer supply shops).