17x9.5 in the front. 3.25" backspacing.
18x12's in the rear. 3" backspacing.
Could easily go with wider wheels, but I went with sizes that would give me good tire options. I love the new meaty rear tires and short fronts that I have on there now.
I sent the measurements to Forgeline. Looked at the old wheels I had on there, measured them, and corrected the numbers so the new wheels would be perfect.
I'll be sure to take pictures of the adapter next time I pull a wheel.