You should be looking for a tire that is as close to 24.1 inches in diameter as possible.
SVTF stock diameter is 24.6
Regardless, 215/50 would be a tad tall at almost 25.5".
I run 205/55/16 (24.9") on 16X7's (45mm offset) in the winter with no problems, but it's very
If you're really set on that size, you might have a shop mount one up, and check for issues.
Though, IMHO, that's just too much.
Not only the aforementioned speedometer error,
but you're also going to lose a significant amount of acceleration out of the hole with that tall of a tire.
Here's a good tire size calculator if you want to check some numbers:
And, here's another one for checking different offset wheels: