@dave r said:
You should calculate the location of the CG of the trailer and position the wheels so that 10-15% of the trailer's weight is on the tongue. As to where the wheels end up, it'll depend upon the trailer.
What you say makes perfect sense however not being an engineer myself I have no idea how to :-
(1)Calculate the CG (assume that's Center of Gravity) and
(2)Calculate if 10-15% of the trailer's weight is on the tongue.
Good answer tho