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One thing that has surprised me about my 428i coupe with adaptive suspension on staggered 19's with Bridgestone S001's is that the ride is far better than I expected.
I thought I might have to consider non run-flats, but now I'm not so sure.
Another factor is the extent to which the suspension is tuned to the OEM RFT's. It's a question I've seen asked a few times, but I've never seen an authoritative answer. If the suspension has really been optimized for the runflats, what downsides will result from using conventional tyres?
It would be great if BMW would come out with some clear and detailed info on this.
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