Strangely, another reader with an F11 5-Series Touring on 17-inch 55 profile runflats is complaining bitterly about the ride. I wondered if there was something wrong with the self-levelling rear suspension, or if the dealer had left the transit blocks in the springs. The new F30 3-Series we drove a coupe of weeks ago was on 225/45 R18s, not the 245/45 and 255/35 R18s that 3 Series used to be fitted with. This gave the tyres a deeper profile and they ride much better.