Hey Soldier. I had these on my Turbo T . Ran 245/50/16s in the front and 255/50/16s in the rears. I believe they have a 4inch back spacing. I can double check later tonight. Sorry I wish I had a picture of them while on my car. I was planning to polish out the wheels but projects have changed along the way when I acquired 3 more Buicks. All cars are gone now. These need to go to good home =)