lower the offset the further it sticks out so +12 and +20
the +12 will stick out 8mm more
right now my car has 18x8 +38
18x9 +38
this is lowered on coilovers, the front is much more sunken then the rear so i guess something like 18x8 +25 18x9 +35 would be ok if u dont want guard work.
best is to test fit before handing over the money