It all depends on the distance from the pin or ball to the center of the trailers suspension on your particular trailer. Also the length of the suspension such as a single axle or tandem axle or tri axle all would have a different center point. One size don't fit all especially a toy hauler when figuring how much the hitch weight changes when loading the garage.
Some have said it works like a teeter totter which isn't correct as it works from a single narrow point. A trailers point is from the front spring hanger to the last one aft which may be 120-130 inches.
When loading out a GN stock trailer or a flatdeck I'm always amazed how little the hitch weight changes when weight is added just behind the axles. Now if its 8'-10'+ aft then the hitch weight changes a bit more.
