Hey man, thanks for your posts. I did actually measure the backspace, don't remember the numbers for the back off the top of my head but the front (19x9) did have a 10" lip to lip measurement and I measured that backspace at 5.5" which led me to believe it has an offset of ~12-13mm ((5.5-(10/2))*25.4 = 12.7mm) which is also what makes me suspect that my order was simply f'ed up since this is even an available offset for this wheel.