I can see how cornering would be affected. Run-flat tires' sidewalls are really stiff, especially compared to a regular tire. Stiffer sidewalls = better cornering. Softer sidewalls = better ride comfort.
My 135i is a daily driver and I still plan to get non-run-flats when my run-flats wear out. I'll take ride comfort over the slight loss of handling.
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2011 135i DCT, M Sport, Deep Sea Blue
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