i have been reading a LOT of posts about people running wheel spacers or offsets that bring the front wheel 'out' to appear flush with the fenders, surely for aesthetic purposes. well, here's an argument that might make you think twice about doing this. spacing the front wheels outward believe it or not greatly effects the scrub radius geometry that the nissan engineers have come up with after years of experience and r&d at the track. you want you contact patch to be as close to the center of kingpin inclination. having more scrub radius creates a steering geometry that works against the well designed chassis. negative camber is totally different, that is adjusted according to driving/track conditions. anyways, if the issue is caliper clearance, use a different wheel company that offers better spoke clearance.
obviously going with a wider rim means you will need figure out your new offset to keep the contact patch center/kingpin inclination in it's factory setting. so, going with a wider rim package, you will want to go the same distance inward as the rim width goes outward. since offsets are measured from the center of the wheel, you shouldn't stray from the factory wheel offsets at all.
350Z's have 2 lower ball joints like BMW's have had for years. that creates a virtual negative scrub radius. wondering why you Z corners like it's on rails? that's one reason. so why would you want to reverse engineer just for looks?
these are all true facts, my opinion is only that i wouldn't run spacers or less offset than stock.
the geometry on the left is more like a 350Z, the one on the right is more like a mustang. and we all know how ill handling mustangs are!

 

I lowered my car with coilovers and bought spacers only for my OEM factory wheels...which i only daily drive on....so im not worried about it, all my other wheels have correct offset with corresponding wider rim.

-j

 

cool man, i'm a chassis builder, and from what i've read in the posts it seemed that some light needed to be shed on the issue. i wouldn't trip on it as a daily driver either, but i have seen this mistake a few times on some rides at Thunderhill Raceway. believe it or not, some guys out there racing don't know that stuff.