225/40/18s or 235/40/18's on B6 A4 sport

[ehfour]

So ive been looking for wheels for a while
and Ive found some conflicting info.

Wanted to know if anyone has run 225/40/18 with sport model B6 A4?

or

Is the correct tire size
235/40/18

[foofighter]

the ideal size is 235 even stock it's 235 but there are some tire manufacturers out there that actually run "wide" so their 225 would be the same as some other 235