What psi are you running? 17" wheels without runflats at a lower psi has to help. Mine are at 35psi but might be too high - need to investigate. Certainly I doubt they need to be as high as the stock low profile runflats which are 42psi in the rear IIRC.
Six Euro Deliveries since December 1998 (Owned E46, E90, E91, E92 and E93)
28 vehicles in 26 years of driving so far. Guess I like cars