Wheel question and opinions...

Need to make a decision and wanted some thoughts… As most of you know I am all about performance but also like looking good(car that is! lol) At any rate I have an opportunity to get a set of BBS RS-GT 2-piece forged wheels, with Diamond Black finish and machined lip. They are 18x8, 5-112, ET35, and include the BBS PFS rings for Audi/VW 66.56mm stepped hubs, genuine BBS valve stem caps, and a brand new set of M14x1.5 28mm lug bolts. These wheels weigh 21.4lbs each.

I prefer 19’s but I have seen these on an S4, even though Tirerack says they don’t work and they looked good… I attached a picture below, it’s the middle S4, not the greatest but it’s the only one I have… It is the wheels off that car…

So how is that offset? I can’t remember exactly how flush they sat… What is the widest tire I could run on a 8 inch wheel? Need to calculate how this will impact my shifts and such at the strip… They are 3.4lbs per wheel lighter… If they were 19’s it would be done… Thoughts? Also, the deal that I am getting is only if I commit to keeping them and using them not reselling at a profit in the short term as I am basically stealing these…

Also, would these work on my TTRS???


http://audirevolution.net/addons/albums/images/726224974.jpg