My car was lowered on spax springs when I bought it. Not sure by how much but it looks pretty low and the common drop for the spax springs for the st is 45mm.
Haven't got spacers but the offset of my alloys is et38 so if my understanding is right they sit 14.5mm further out each side then the standard alloy et52.5 offset.
Do get abit of rubbing if I hit a big bump or pothole at speed so need to do abit of work on the arches.
Sorry if that don't make sense. Here what they look like though if u wanna know how yours might sit.