Originally Posted by 9c1
I'm running the 18" M sport wheels at no higher than the recommended pressures listed on the tyre placard in order to get some sort of ride quality.
Also, don't forget that you need to reset your OBC tire pressure monitor each time you change tyre pressures in order not to get false low pressure readings.
I drove a 323i touring recently with 18" wheels and no M technic sports suspension and the ride quality was pretty good compared with my vehicle.
I'm thinking next time around I will probably go with this combination as the 18" wheels and M technic suspension on Sydney's poor roads is a little too firm and will create more rattles as the car gets older.
Is your car running RFT Pirelli Euforias' by any chance?