Was chatting to a colleague at work about my soon to be new Z4 (54 plate so new to me anyway) and mentioned about ditching the run flats at some point. Not right away as the dealer has just fitted a full set of Pirelli run flats to the car so will try them out. Anyway my question is does it affect your insurance in anyway reverting to standard tyres? Ive been told that its changing away from the recommended spec and that if you dont tell them they wont pay out in the event of a claim, and if you do tell them they will ramp up the premium as they see it as less safe? What are people's experiences?