Help - 17" wheel size (offset) for 2005 S4 Cabriolet
 

I recently purchased a 2005 S4 Cabriolet. WHAT a machine!
It came with 18" AVUS S4 wheels (235/40-18 Tires). I am interested in
purchasing 17" wheels for the snowy Connecticut winters and was hoping I
could get some feedback on exact wheel size.

The label on the driver door recommends 215/50x17 for the winter tire size.
Most websites do not list the 2005 and if they do, the 17" size is 235/45-17
which is a bit too wide for my taste in snow.

Question: what is the needed offset for a 7x17 and a 7.5x17.

Thanks in advance for your help
Ramzi in CT

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