If anyone cares about the tire size compared to stock, I just ran it through the tire calculator compared to the two original equipment sizes for Contour SVT's.
Compared to the 205/55R16, the 215/45R17 will throw the speedo off 1% while the 215/50R16 to the 215/45R17 will throw the speedo off by .6%.
The tire is a perfect match. .6% or 1% is insignificant.
