Rear tire size for C63
This may be an old question, sorry, I'm new here. Just got the car ...




285s on 20s maybe but you might still have rubbing issues. 285s on 18s if you have a nitto DR or something with a really narrow width for a 285.
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Probably not the best option for a 9in wheel.
http://www.nittotire.com/tire/nt555r#size - Nitto recommends a minimum rim width of 9.5" for the 285, and Nitto doesnt run as wide as others.
e.g. a Nitto 285 runs 11.22" wide, Michelin PSS 285s run 11.4" on 10" wheel.
I would go 275/35/18 max. I'm running 265/30/19 on my 19s and I think they look nice, any fatter and I think it would be too much.
Only the C63BS got that treatment





