I had ordered 17's on my '07, R56, MC-S. When the original tires were due for repacement, around 20K miles, I started shopping around. I was suprised to find that for the price of the RFTs, I could buy two sets of non-RFTs. To make a long story shorter, I located and bought a nice set of 16" tires and wheels on ebay with about 1200 miles on them. They were RFTs. I ran them for a year, sold them on ebay, made about $100 profit and bought a new set of 18" RFTs Komhos for the original wheels. I do know that there's no room to store a spare on the MC-S; so if you go with non-RFTs, you'll need to carry a can of "fix-a-flat" and invest in a small plug in compressor to carry around.
It drives fine as the one non run flat is on the rear.
I have just enough room to fit a spacesaver in with it been a Clubman.
My plan is to buy a new set of wheels with tyres next payday and sell on the old alloys.
I just cant decide whether to go for the slightly smaller wheels or stick with the 17s. Its a long time since I have driven anything with so little grip and that tramlines so badly! (I know this is mostly the tyres!)
You will find BMW advice you NOT to miss match tires and even brands or it will reduce the effectiveness of the stability control and your ABS to, and you may also find your insurance
basically i would say depending on what you want to do with your car depends on what you go for.
if you want handling and can put up with a bit of a rough ride 17" with non RF
if you are not to worried about handling and want a smoother ride 16" with non RF
if you are going to change the wheels read the FAQ here at mini2 lots of advice and picture in the wheel gallery. and also advise on tire sizes.
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