Well run flats are your problem, take them off straight away!!! Plus BMWs are renowned for a harsher ride throughout the ranges. But I'm young and not really too fussed unless I'm in the back which I never am.. that would be in a 3-5 series but now I have the M i don't find it any worse than an E46/E92 M3 or even a mini cooper/s which I have had all... Must be an age thing
Tom Scott
Tom Scott