Styling wheels and tyres

[Marea20ValveTurbo]

hi i have a Marea 2.0 20v and was wondering if anyone could tell me what the biggest wheel size i could get away with, without messing with the arches, cheers

 

[Venters]

Lowered you can put 18s on without arch work aslong as the tyres are 205\35\18.
My 215\35\18s needed just a tiny little trim on the rear inner arch.