I was browsing TireRack for new wheels and I noticed the website gave me different sizes and I could not find any information on them. I was hoping you could help me out.

My car is a 2001 A6 2.7T with 17" wheels (the BBS wheels that come with the Sports Package pictured above). The tires TireRack showed me for my car had 17x7.5, 17x8, and 17x8.5 as their sizes. Will any of those sizes fit? If so, what do the second numbers (7.5, 8, and 8.5) mean? What other specifications should I watch out for? I gathered from the recommended tires that I need wheels with wheel offset of +35 mm and bolt pattern of 5-112.

Also, do you have any special deals these days for a set of 17" wheels?

Please let me know. Thanks!