That's a solid point about the spare also didn't mean to imply wasn't also a solid point to stick to factory tire circumference. I'm just saying if for example you drive a lot on unimproved roads you may desire to maximize your tire size/sidewall as has been done by xo members to great satisfaction. It does change the flavor of the car for sure in a few ways but make the car what you need is my feeling.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)