So, now you need to figure out how changing the overall tire size (new tires) will affect this number. Your goal is to get the new tire/wheel diameter size to be as close as possible to the number above.
414.8 (17" wheel) + 101.5 (225/45) = 516.3MM
That is the overall diameter of the factory 17" wheels and 225/45/17 tires.
While not a perfect fit, being off by 1 MM is as close as you could hope for.
Hope this helps,
PS: To calculate wheel sizes, just factor in the wheel size into the overall diameter of the tire/wheel combo.
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