fitment: 18x10's all the way around
 

So, I'm starting to look at street wheels/tires for the g. The setup that I'm considering are 18x10 front and rear with 265/35R18 front and 285/35R18 rear. I'm not sure on the wheel well fitment and offsets though. Anybody have any thoughts on this? I tried to hunt around but I couldn't find anybody running 265's or 10's up front.

thanks

Rears you should be fine if you get the proper offset. Stock 18" wheels for the '04 are 8" wide with a +30mm offset. Going to 10" w/o changing the offset effectively puts you another 25.4mm closer to the curb. You have 28mm to play with. Meaning that if you go with a 10" wheel and an offset any less than +28 you risk rubbing.

Fronts, you will rub. Period. That's why you don't see anyone running 10's in the front. I would suggest perhaps 18x9 in the front with 255s. But if you're dead set on 10" consider body mods for the front fender.

Thanks for the response. Do you know of anybody who has actually test fitted 18x10 up front and seen rubbing? I'm not yet convinced that it's certain to rub. I'm putting together a spreadsheet with pictures of people with aftermarket rims. So far I found a person running 19x9.5/+29 with no interference from suspension components along the inside border of the wheel/tire. This equates to a back spacing of 149.65mm. An 18x10/+23 wheel has a backspacing of 150mm. I also found a person running 19x9.5/+19 with no interference from the wheel well along the outside border of the wheel tire. This equates to a front spacing of 101.65mm. An 18x10/+23 wheel has a front spacing of 104mm. Does this additional 0.35mm on the inside and 2.35mm on the outside for an 18x10/+23 wheel pose a problem? I don't know. I'm still collecting information.

It would greatly help if people with 9.5 wide wheels and offsets <=+19 and >=+29 could post wheel/tire dimensions and pictures that allow viewers to really appreciate clearances and how the wheel lips line up with the apex of the fender opening.

Dimensions and pictures for the rear with 10.5 wide wheels would really help, too. Also, info on drop due to springs and whether you run brembos and had to roll fenders would be good.

I would do a search on "rubbing" in the "wheel, brakes..." section It may take a while to sift through the number of posts, but you may eventually find someone who has an experience to help you.

This is still a somewhat ambiguous discussion,
since you also have to factor suspension work as well.

One cars fitment with a certain drop & camber may work but,
if your set up is not the same it may not work for you.

JMHO, but....
If you're pushing the fitment limit envelope, I'd def see a good shop & do some trial fitting.

Good points. I'm addressing drop where I can. Personally I have no plans to ever change the stock ride height. Toe should be irrelevant. I had assumed a streetable camber. Is front camber or caster even adjustable on these cars? The service manual says no. I need to take a look at my car this evening to make sure. It's hard to believe that camber is not adjustable.

I'll eventually try to find a shop that can help me, but I suspect I'll have trouble finding a shop that will do test fits, so this may be the best info that I'll have before placing an order. I think this exercise would give me a better idea of the problem, allow me to communicate with a shop more efficiently and with a large enough sample size resolve alot of the ambiguities you refer to.

Hard to believe I know, but;
Camber is fixed, it's due to the upper control arm (A arm)
which has no adjustment.

That's why dropped cars can sometimes handle larger rim & tire widths.
The drop creates more camber & the wheel will tuck in more.

If you're staying at standard height,
you may not be able to push the envelope as much as you want.

Good point. I hadn't thought of that consequence of having fixed cambers. Does anybody have camber values before and after dropping their cars?

If a dropped car tucks the wheel in at the top a non dropped car should be able to compensate with a larger offset. The limitation would be from the uprights. If we assume the uprights between the g35 and 350z are the same then http://www.sportcompactcarweb.com/pr.../0404scc_350z/ would seem to suggest that the max backspacing is 150mm.

FWIW..
Here's a chart that was done quite a while ago by THX732

inTgr8r, thanks for digging that up. I don't know if I'm reading it wrong or it only applies to the sedan, but the chart seems to indicate that there is only 1mm of distance from the front outside fender line and a 17x8/+33 wheel. I just dropped a plumb off mine and I have about 19mm on my 18x8/+30 with 225/45R18.