In one of the posts to his topic What does my Fiber Stream Weigh?, Clue: NOT what the Manufacturer advertizes!
, Frederick describes the optimal trailer and tongue weight
calculation method using a commerical truck scale.
To just weigh the tongue
, for our little trailers a bathroom scale works fine: get a jackstand or stabilizer stand set up to hold the trailer tongue at the right level when placed right under the coupler where the ball goes, lower the coupler on to it, subtract whatever the stand weighs, and you have a tongue weight
. I did this (carefully) with my 17' Boler
(about 300 lb tongue weight) so it should not be a problem with a lighter Surfside
14. It's tempting to just put the scale under the tongue jack, but if you do that remember that it's closer to the axle
than the coupler, so it will read more weight than the hitch will actually carry: weigh at the jack and do the leverage math or just weigh at the coupler.
I've seen tractor-trailer rigs (that is, 18-wheel semis) bouncing
severely on concrete roads in which the slabs have shifted causing regularly patterned bumps. If this really is a resonant oscillation problem, changing speed seems like the practical solution(up or down, but down seems safer...).
Personally, I doubt the lack of load in the trailer is the problem, since the maximum cargo load in the trailer is likely less than half the unloaded weight of the trailer. Loading up the back of a front-wheel drive van makes a proportionately similar change in the load on the rear axle
, and the vans handle it okay. Of course, van suspensions are better...