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Discussion Starter #1
Hi All, I have just bought a Countryman ALL4 Cooper S, 2010 model, and I noticed that it has 225 45 R18s fitted.

I'm not a wheel or tyre buff, so can anyone help me understand why R18s are chosen over the standard R17s?

The tyres fitted are run flats, and they are near to their service life, and I was contemplating changing them for non-run flats, but as part of my prior research, I had chosen Goodyear EAGLE F1 ASYMMETRIC Tyres (non-run flat), due to the harsh ride.... that was before I saw that it had R18s fitted.

Any suggestions to what non-run flat tyres I should select, for the R18 wheel?
 

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Hi All, I have just bought a Countryman ALL4 Cooper S, 2010 model, and I noticed that it has 225 45 R18s fitted.

I'm not a wheel or tyre buff, so can anyone help me understand why R18s are chosen over the standard R17s?

The tyres fitted are run flats, and they are near to their service life, and I was contemplating changing them for non-run flats, but as part of my prior research, I had chosen Goodyear EAGLE F1 ASYMMETRIC Tyres (non-run flat), due to the harsh ride.... that was before I saw that it had R18s fitted.

Any suggestions to what non-run flat tyres I should select, for the R18 wheel?
I changed the run-flats on my Cooper S convertible and fitted Eagle F1's. Excellent tyre and was the best thing i could have done to improve the ride.

I now have a Paceman SD and have the same dilemma as you. 17's are far cheaper than 18's though
 

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Discussion Starter #3
I changed the run-flats on my Cooper S convertible and fitted Eagle F1's. Excellent tyre and was the best thing i could have done to improve the ride.

I now have a Paceman SD and have the same dilemma as you. 17's are far cheaper than 18's though
Yes, as I mentioned in the other post, I'm not forking out more money for smaller wheels, and I've already bought new non-run flat tyres for the 18" wheels (Barum Bravuris - over here in CZ, they have good feedback).
 

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Discussion Starter #5
Dunno, haven't got the car back from service yet, having to register it here in Prague as it was an import from Germany.
 

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Discussion Starter #6
Is there much of a difference in the ride quality?
FYI, I'm actually happy with the ride quality, now that I understand that the Cooper S suspension isn't as soft as other cars, but I'm still struggling to find out what the proper tyre pressures should be, as I need to narrow down a skitterish back end to either rear tyre pressure or wheel alignment....
 
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