Yes, the ideal size for a 17x8 is 225/45. However you can put those tires on a 7 or 7.5" tire without any problems especially if they run a little narrow. For example I have Hankook v12s in that size on 17x7 LGT wheels but would want a 17x8 if I was going to use a hankook RS3 which is wider for the same size.
205s on an 8 or 225s on an 8.5 is a bit too much stretch, however you do want the rim to be at least as wide as the tread because it supports the tire better.
Which of these tires is best for performance and rain?
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