Just fitted some vxr replica 18" wheels, got them off ebay 2nd hand, advertised vectra / astra so gathered they would have the same offset required as the Zaf.
I noticed that the front wheels look like they stick out further than the rears now.
Also the rears dont look straight. they look almost like the bottom of the tyre sticks out more than the top, i think this may be because the shape of the car above the rear arches is angled the other way, especially with the gsi arch bodykit.
The car looks sweet though, just wondered if anyone else has fitted bigger wheels to their Zafira' and come across this.
I'll get some pics up over the weekend.