i think they are 5x114 or 5x120.... the offset spacer you get will be dependent on what the wheels offset is. you can run a total of a +30 without a ton of issues.
you do this and i will back into your car with a silver S4
saw blades are one of my all time favorite wheels... a lot of people hate them though. but really in the end its your car, so do what you want to it. and there not the hardest wheel to find and adapters are easy to get for them.