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I’m bad so I just run my autocross pressures on the street on my M235i with the PSS ,which is like 46/44. Your car is a bit lighter even with xdrive, but has the narrower wheels/tires so maybe running a slight rear bias in that high 30 range as others mention is the best way to go. You also have runflats which are stiffer than PSS so who knows maybe mid 30s like 34/38 is best. I’d say add more front pressure first.
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