I have the 19" wheels and can honestly say that they have deteriorated significantly in terms of traction in the last 12K. The car is now pushing through turns in the rain and I've had a couple of experiences that have caused me to SLOW DOWN (yes, a good thing, but turns I was able to take at higher and safe speeds before are no longer doable).
I've lived with this beast for 15 months now and I know it pretty well. The change in its driveability (for the worse) is significant.
I'm suspecting the OP might be experiencing the same thing (his being with his rear tires, mine with the fronts).
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2011 1M, Black loaded sans sat radio
2021 911 C4S Gentian Blue, manual
2023 X3 M40i - loaded sans Park Assist
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