Just picked up a Star spoke style 189 front 8Jx18 alloy rim - £293 incl vat from local BMW dealer. I've ordered a Pirelli Rosso 225/40R18 (non runflat) tyre for £104. Not cheap, but I feel better having a spare wheel for longer journeys, and emergency use at home. My local tyre supplier told me they could usually get runflats in on next day order, which is good, but wouldn't always keep me mobile.
2015 F32 430d M Sport with M Sport Plus and Pro Media packs - Winter wheels and tyres
Previous BMWs: 2012 F10 520d M Sport, 2009 E92 320d M Sport, 2006 E92 335d, 2004 E60 530d, 2000 E39 525d, 1997 E39 523i