Quote:
Originally Posted by ianfp
I expect the difference is down to tire sidewall compliance. As Gouda says, run flats have a very stiff sidewall. I would have thought your adaptive suspension would smooth everything out, but those Pirelli P Zeros are particularly hard. I will replace mine with non-runflat when needed, but they must be BMW star marked apparently.
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I think that BMW star approved are RFT's only. Upon vehicle return at end of lease the tires must be star approved. So, before then its driver choice.