The "spare" is a 3rd row on wife's E70 50i. Crazy thing though not "m sport" came with square 255/55-18. The rear tires wear pretty quick with the fact the rear wheels are often going 1-2mph faster than the front (and occasionally 10; the DSC will kick in often during full throttle shifts). I would like to upsize slightly but to a square setup.

With the 3mph speedo lie, I will be ok with up to 4% up size to get the speedo to read correctly on the freeway. I'm going to start a thread on the topic as we need to change her tires before winter.

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