Many of us with Nismo wheels run 15mm spacer all around and some will run 20mm spacers up front as well. There a lot to work with.

I won't be tracking it, just the occasional spirited back road run. As for lowering it, it won't be much. I'm thinking either the Swift springs or the Nismo suspension if I can find a good used set, but that's it.

So a 265/35/19x9.5 on the back is just fine? I do want a little poke. Any spacer necessary for that? Maybe a 10mm?

I just need to figure out spacing on the front to not rub? And your best guess is a 25-30mm spacer for the front, correct?

Again, I'm sorry. This is my first car like this and the first time I've had to put tires on it, so I'm beyond lost.

Remember something about these cars; the wheel offset differential is roughly 1” or 25mm; so if you’re running identical wheels-you’d want 25mm spacers on rears (+ or -5mm) that’s unless you want the track width wider up front.

That's my setup ;) The added 15mm and 20mm wheel spacers sure makes a aggressive set up when running factory oem tire sizes :tup:

So, just to be clear, to run a square 265/35/19x9.5 setup, I'd need a 20mm spacer up front and a 25mm in the back?

Nope; roughly 25mm more in rear; if you drop on swifts-your camber will go negative more & make it easier for the 10.5” Nismo rear wheels to fit....but looking all through these different threads will help.

20/10" +10 front 255/30
20/11.5" +15 rear 305/30

Iv got SPL suspension parts for the front and rear

What kind of camber you guys think Ill need if Im dropped this much. I already have some what of an idea but the more feedback, the better. Im not even close to an expert on the 370z.

https://i.imgur.com/hc32KDy.jpg

You should probably give us tire sizes, but . .

Fronts: around 3 deg. I have 20x11 +15, 275/30. I'm at -3 camber. Your size (20x10 +10) is 8mm LESS "poke" than mine; HOWEVER, my fenders have been pulled slightly.

You should roll your fenders, and of course, to run that camber, you need some adjustable front upper control arms

REARS: 20x11 +0 fits with -2 camber with 285/30. Your size (20x11.5+15) 9mm less, so you should be more than fine with -2 camber. Stock is around -1.8. Given that you are aiming to go pretty low (top of tire to fender), I suspect you'll need adjustable arms to correct toe, even tho camber can be achieved with stock components

Something like a 245/35/20 F and 285/30/20 rear would be in the ballpark

ops, yeah, I forgot tires. I was thinkgin 255/30 305/30

oh my god reading the responses to this is making my head hurt. Somehow you all have managed to go backward.

let's go back to your original premise:
OEM nismo rears on all four corners (19x10.5 +23) with 265/35/19

These will fit. They'll fit with a 20mm spacer in the back. You might need to roll a fender, the only issues i see are maybe in front. But rest assured, folks have run Nismo rears in front ON THE TRACK regularly with no problems, so it is obviously doable, and they do it with more tire than you, albeit also with adjustable suspension components

Now, I have questions about the limits you're putting on yourself:
1) Why square 265/35/19 all around? Thats LESS tire in the rear than STOCK, which seems stupid. There may be some track suspension setups where square tires are, in theory, optimal, but you arent doing anything like that, so it seems like a pointless, arbitrary starting point

2) you don't want adjustable suspension arms. Well, your post history mentions spending $13K on engine ****, so spending $700 on suspension seems like a stupid thing not to do, GIVEN your odd limitations - particularly since you seem to want more "poke" than stock

All in all, you seem to be clinging to a setup that isn't ideal and isn't what you really want anyways

Proposed solution:
Get a set of OEM nismos
they are 19x9.5 +40 and 19x10.5 +23
Get stock sized tires, 245/40/19 front and 285/35/19 rear

These are 100% guaranteed to fit, because, well, its stock.
These are 100% available, because, well, they appear in the FS section regularly

Put them on the car. See how you like them

Now go to the For sale section here and grab some spacers. 15 or 20mm pop up all the time.

Slap them on your car. See how you like them. lots of people do this. they will fit.

You are making this harder than it needs to be, ESPECIALLY when dealing with an OEM nismo wheel that damn near everyone has

It also sounds like you don't know much about wheel fitment and don't seem like you want to put much effort into this, so that is why I have given you an easy, accessible, affordable solution THAT DOESNT require a bunch additional parts/work

This thread really shouldn't be that difficult

I don't like 305/30 because it's too tall (27.2 in). Stock is 26.9, i dont see a reason to go higher than stock.

More importantly, you may have too big a difference in height from front to rear - fronts are flat 26 inches; rears are 27.2, thats over an inch difference in rolling diameter

That is why i suggested 245/35 and 285/30

you can also probably do 265/30 and 315/25 or 325/25

right on, I did forget about roll diameter, thanks for the feedback man. I know youv had your fun figuring things out. Iv seen your car

I actually went too conservative in the rear - coulda gone with a 325/25/30 pretty easily. But, this was the first set of wheels for the Z so it was a bit of experimentation

As for the engine build/swap, those were also simply ideas I was asking questions about. I'm not sure which you're referring too, possibly both, but either way, both were ruled out for various reasons. I've been extremely transparent in both. In 1 I specifically stated it was a brainstorming idea that a buddy and I had. In the other, it was a legitimate idea, but if you read the whole thing, you'd see I was provided with reasons why it would not be worth it and accepted those facts and moved on.

The reason for that specific size was to be able rotate my tires to extend life, and based on what I've read thus far, 265 is as wide as you can go in the front without modification. It was an idea I had, but as I previously stated, I'm totally new to this, so I asked a question, which if I'm not mistaken, that's what this is for. I have read through quite a bit of this thread, but no, not all 170 pages. Maybe someone has kindly laid out exactly how to do this in a previous post and I missed it. Maybe not. The point here is I am reading on my own, but I'm also asking questions about this I don't understand. I'm happy to admit when I don't know things and ask for the help of those that do. I do not own the Nismo rims yet, and while I understand what you're saying that going from a 285 to a 265 is not the wisest decision, it's still an upgrade for me as mine is a base and currently has the factory 245 on the rear. Again, I'm totally new to all of this, so I'm trying to learn by asking questions that I have yet to run across answers to.

The answer then is you're putting lots of pointless restrictions that are creating unnecessary hurdles

Rotating tires? this is a performance RWD car. It's gonna have staggered tires.

Get over it?



You want tire wear, no upgraded suspension components, square set up, but poke in rear. just all over the place.

Throw on the staggered nismos and some spacers, be done with it.

If you're not willing to go low and adjustable suspension there's no reason try to deviate from stock. You'd just be half assing it.