I have had these wheels and tires from new. They were on my Bay in 1999. Here is a pic during an 1600km road trip to Edinburg Scotland for the Millenium Celebrations. It was pretty cutting edge back in the day. (Please excuse random family members.)

Here is the size and backspacing info, all are the same size rim, tires are 205/40 17 on the front and 215/45 on the back.

They fitted in there with wheel adapters to the stock brakes, but with the narrowed beams and 944 brakes will bet in there even easier (and lower).
Tires have about 80% left on them and have been protected from the sun as they have been unused for the 10 years I have lived in BC.
There are some shallow curbing marks and scratches on a couple, but nothing major. Straight and true.

More pics here
http://smg.photobucket.com/user/sinephil/library/Dubs%20for%20sale/Porsche%20wheels?page=1