A 205 is not always exactly a 205, manf use rounded off numbers and sometimes way off numbers, well known to us that race
A 7.5" wheel is measured inside the lips, it is really 8.5" in total width.
Thus, a specific 205 on a wheel that is 8.5" wide at the outside of the lips can have a little stretch, likely not much and some tires might not show any at all.
The 205/45/17 PS3 AS on my 17x7 are a case in point, they look like they should be on an 8" wheel, they are much wider than the stock tires.
A little stretch is usually a good thing for handling, feedback, etc...