I have the 16inch Blaster's, but have just put 17inch S Spokes on it, Looks far better with 17inch wheels. There is way too much black gap with the tyre and trim in my opinon with 15 or 16 inch wheels on the R56 or R55.
I had 16inch runflats, but now have 17inch standard tyres, the feel of the car is harder and feel alot like my old
MCS now.