How low ?

[Big D 35]

Hi all, new to passats but had a few vag cars now (.:R32 rep golf 20v turbo, Leon Cupra, A3 1.8t) loving the Passat but it needs to be much lower to look right imo, i was wondering how low i can go without hitting anything mechanical not bothered about scraping speed humps ect, i'm on the original 7 spoke alloys if that helps, thanks, Dom.