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      10-07-2018, 06:04 PM   #5
solstice
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Drives: 2015 M3 6MT
Join Date: May 2013
Location: Seattle

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A larger wheel contributes to a more stable cornering feel. I’m not saying there is a performance benefit from this but a larger wheel on the same car has a shorter tire wall which bends less than a longer tire wall when exposed to cornering forces. On the other hand the shorter tire wall will give you a stiffer ride, less protection from curbs and potholes.

Visually my guess is that 19” is the sweet spot as it is on the F80. I also suspect it is a good compromise for ride quality.
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