Modified Rims for Homemade Utility Vehicle

I had to modify the front and the back rims for my homemade utility vehicle. For the front tires I needed to have a wider rim.  I cut the center out of the narrow stock front rims and put them into another set of wider rims that I had.  (Photo 1 and 2).  For the back, I had to put more of an offset onto the existing rims. I used pieces from the original front rims to add this offset on the back rims.  I added 4 inches to each side. (Photo 3 and 4).  The original distance between the back the back tires is shown in the 5th photo.  The new width its shown in the 6th photo.