RPF1 Lowest offset

[MEN15S]

Hey guys,

Looking at a set of RPF1 for my brothers DC2, but just wanted to know how low of a offset i can go to get a flush look without spacers.
and should he go 16's or 17's
Thanks

[charliebrown]

16x8 +38 baby
205/45/16

or chunky look 225/40/16