Originally Posted by RedComet
Out of curiosity, anyone here mounted 5 x 100s using a hub adapter?
Here's your problem - bolt on adaptors take up generally 25mm of offset. The factory offset is relatively high at +50 to +55, depending on what your car is equipped with. A 7" wide wheel with an offset of +35mm is considered flush on the '12 Focus. Anything more than +35 will stick out past the fender. If your tire choice isn't carefully considered (i.e. stretched fitment), you will experience tire rub if you're lowered.
If you go with an identical offset as stock in a 7" wide 5x100 wheel and use a 25mm spacer, that takes up 25mm of offset, leaving you with an effective offset of somewhere from +25 to +30. That puts your wheel lip outside the fender and in need of a stretched tire to prevent rub and not look, for lack of better terms, 'ghetto.'
I suggest that you do your homework if you're intend to go this route. I don't really endorse the use of lug adapters in general anyway.