maximum tyre size ?

[whopwop]

Has anyone used tyres larger than the standard 235/265.
I am just wondering what is the largest size front and rear on the standard 19'' rims without fouling the archs etc. ??
I am running KW Club sport 3 way, so camber is not an issue.

Thanks in advance.
Mark.

[cslbecks]

245/275