i just got a set of bbs lm's and i need some advice
Also, the tire sizes you're suggesting are too narrow, given the width of the rims you provided.
I wouldn't put anything narrower than 225/45 on a 8.5" wide rim, and even that is stretching it. I have 225/45 on 8" rims, and they are just flush with the rim edges. Even if it is possible to put on a 215/45 tire on an 8.5" rim, you'll scrape and bend the heck out of the rim lip.
Same goes for 225/45 and 9.5" rims in the rear. I think the max recommended rim width is 8.5". I don't even think that a 17x9.5 rim will fit without rubbing if you'll have an aftermarket sports suspension installed.
All this is assuming you have an A4, which you have not told us ;-)



