2006 e87 16

Hi, my 1st post :hihi I have recently ditched the runflats on my 2006 118d. It is fitted with 205/55R16 tyres. Which E46 space save should I be looking for, 15" or 16"? 15" would appear to be the best size for a rolling radius match but will it clear the brakes? I'm also confused as the...