It depends if you're lowering (which you'll want to on 19's) and by how much, I ran 19" 8j ET45's on the front with about 40mm drop and the tyres rubbed when loaded and under heavy cornering.
If you put your hand inside the arch and have a feel there is a lip there and that's where the wheel catches most of the time so you get that lip 'rolled' and you've got extra clearance.