Still no answer about the 285/ 55 R15, I know I write badly in English but I think I'm understandable anyway.
The cars are less handle with 285 or more, it's true but when used on public roads, it's better not to be cross in all turns
The 285/40 W R15 already exists at Michelin in road homologated racing tire and the 225/50 exists in the same profile.
http://www.oldtimerreifen24.de...15-TB5-R-medium.html
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