i use to run summer tires for years and got tired of replacing them every third summer due to softer compounds wearing out quicker. It was always the inside of the tread to since these cars are cambered for handling. Since i moved to the E90, i stuck with the all season conti pro contacts in a non-runflat and after driving them, i see no reason for me to get summer performance tires as i dont track the car and use it for daily commuting. Quiet ride and long treadlife, works for me.
328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black
535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square