Ultima rim dimensions

Okay I did some measuring and here's some basic dimensions that can be used to assess whether an aftermarket or alternative wheel might fit your Ultima.

Common Dimensions front/rear;

Bolt Spacing PCD; 5x112mm (Ford Granada, Some Audi, Mercedes and VW but bolt spacing is only a small piece of the puzzle)
Stud hole diameter; 0.75 inch
Center bore diameter; 2.5 inch
Center bore chamfer; 45º
Center bore chamfer width 0.05 inch
Wheel to hub mating flange diameter; 6.375 inch

Rear Rim specific;

Rim width; 13 inch
Backspace to inner flange; 8.25 inch
Backspace to outer rim edge; 8.75 inch
Offset; 3.25 inch
Center hub mating face to wheel spoke depth (Caliper clearance); 0.9 inch

Front Rim Specific;

Rim Width; 8.5 inch
Backspace to inner flange; 4.75 inch
Backspace to outer rim edge; 5.25 inch
Offset; 1 inch
Center mating face to wheel spoke depth (Caliper clearance); 0.45 inch

If you are not familiar with wheel specifications and dimensions do a Google search and you'll get diagrams of what each dimension refers to. US wheel manufacturers for the most part refer to 'backspacing' as measurement to inner flange (lip of tire bead seat), although some use to outer rim edge as it is easier to determine accurately. Verify with your wheel supplier exactly what they refer to as 'backspacing'.

The legal stuff; Information in this post is provided for information only, it is up to you to do your due diligence as to correct fitment of any alternative rims. I will not be held responsible for any inaccuracies, non fitment issues, or accidental death/dismemberment arising from use of this data.

I would be surprised if a Ford rim fits, the Ultima lug spacing is 5 on 112mm, Ford is 5 on 4.5", it's cose but no close enough.