The stock 17" wheels for the 2011-2012 Jetta are 7x17 5x112 with ET54 offset.

I'd like to get wheels which have got the same specs except the offset's ET45. As mentioned, everything else is the same. Even tyre profile will be identical (225/45R17).

Is 9mm offset difference that bad? Is that considered roadworthy in NSW? Some forums say ET54 to ET45 may be too big a jump, others say it's OK as it's going "outwards" and would be worse if going the other way around.

What do you guys think?