Yes, ok @gcanfield. I think what I said about the moments should work. make a cad model with the origin somewhere in the middle of the geometry. Use the Coordinates where the wheel meets the ground as distances in x,y and z to get forces onto the road from the wheel and set your centre of rotation to be the origin. You might as well select all faces for this.
I think this link helps:
http://www.ce.memphis.edu/2131/PDFsF12/Moments%20in%203D.pdf
This might seem complicated at first but Matlab can make quick work of this if you are familiar with it.
Solving as a static problem we can double check the calculation using sum of forces due to moments in each direction across all wheels should equal the total force in each direction (also calculated by SimScale).
This is the way I would do it, I can’t think of any other way of doing this.
Kind regards,
Darren lynch