A non Nismo with Nismo wheels would look exactly the same as a Nismo with Nismo wheels because the body is exactly the same.

Factory Sport wheels are +30 offset in the rear, factory Nismo wheels are +23 offset in the rear. Meaning that if you remove your 20mm spacers but keep the same 275 tire, your tires will be 13mm further in than currently. However, factory Nismo wheel tires are 285, which means with 285s on Nismo wheels and no spacers, your setup would sit only 8mm further in than currently (12mm further out than Sport wheels & tires from the factory without any spacers).

With my 325s (which you can see on the pictures on the first page of this thread) on Nismo wheels and no spacers, my tires theoretically sit 12mm further out than your current setup which is with 20mm spacers. My tires are flush with the fenders as you can see from the pics.

If you like how your current tires sit relative to your fenders, and you would like to keep the factory 285 Nismo tire size, you would theoretically need to add an 8mm spacer to the Nismo wheels with 285s to keep the same fender to tire position.

Compared to your current Sport wheels, 275 tires, and a 20mm spacer...Nismo wheels would sit like this:

-No spacer and 285s means they sit 08mm further IN.
-No spacer and 295s means they sit 03mm further IN.
-No spacer and 305s means they sit 02mm further OUT.
-No spacer and 315s means they sit 07mm further OUT.
-No spacer and 325s means they sit 12mm further OUT.

All this is theoretical however, because different tire manufacturers make different sizes even though they have the same numbers for size, they are never completely accurate about that and sometimes it's enough to be noticeable even to the eye.

Thanks for the great info! I was a bit lazy to use the offset calculator but you gave me a pfetty good idea what it should look like:tiphat: Ideally, I would like it flushed as possible, maybe a tiny poke too, so looks like i'll be putting on some 10mm or 15s to get that look until its time for new tires then I'll try out your set up with 325 and remove the spacers.

Edit: I forgot to mention my current tires on the sport wheels are 275/305s. I basically did what you said in the first post, moved the rears up front and picked up a new pair of 305 for the rear. Absolutly love the look and how comfortable the ride has become with these larger tires.

Nice. Are you getting a used Nismo set with tires already installed or just the wheels and buying tires seperately?

I got the nismo wheels without tires. I'm going to swap my current tires off the sport wheels to the new wheels, 275/305. Both front and rears still have plenty of meat left so I'm going to ride them out, should last at least until the end of the year.

In this case, the info should be edited :)

Compared to your current Sport wheels, 305 tires, and 20mm spacers...Nismo wheels would sit like this:

-No spacer and 285s means they sit 23mm further IN.
-No spacer and 295s means they sit 18mm further IN.
-No spacer and 305s means they sit 13mm further IN.
-No spacer and 315s means they sit 08mm further IN.
-No spacer and 325s means they sit 03mm further IN.

So...if you're running 285s on the rear Nismo wheels at first, you can leave your 20mm spacers on and your tire will sit almost the same as your current, 3mm further in actually so it should clear without issues.

If you put 325s on and remove the 20mm spacers, it'll be the same 3mm further in. So, ideally if you want a slight poke, you should install 5mm spacers in the rear when running Nismo wheels with 325s.

Damn, I guess I didn't guess correctly again :)

In THIS case, if you leave your 20mm spacers and 305s, and just replace your Sport wheels with Nismo wheels, you would have 7mm of extra poke.

If you remove the 20mm spacers, your tires will sit 13mm further in than current.

Hope it's not all too confusing and that it helps :)

Not confusing at all bro! And thanks for posting the various specs. I'm sure it will help out a lot of people looking at threads like this one for wider fitment. Basically if I want to keep the current look I need to switch my 20mm for 15s and i should be good with an additional 2mm poke, which is not bad at all! Then when time for new tires I can bump it to either a 325 or 315. Not sure if I can do 285 up front because I'll be dropping the car on some swifts spring too, granted I'm only lowering the car an inch but I haven't seen anyone done 285 and lowered yet. What do you guys think? Do we have enough room up front to run 285s and swifts?

Yes exactly, but I didn't think you'd want to spend money on 15mm spacers and deal with changing studs and everything just for a temporary fitment (if 305s are temporary that is). The only only issue with 305/30R19s are that they are 2.4% smaller in diameter than the original Nismo 285/35/R19s. The 325/30R19s are only 0.7% smaller than the 285s, but 0.4% larger than the Sport's 275s..so the 325/30R19s are a balance in the middle between Sport package spec tires and Nismo spec tires.

I'm pretty sure the fronts will be fine since I'm thinking of adding a 5 or 10mm spacer upfront still...the rear is flush with 325s but the front is still inset a little.

Besides, the lower you go the more camber you get (unless you install camber arms) so you'll have even more room. On the inside there's no issues, the tire clears the knuckle (the closest thing to the tire).

Yep. RE-11s, just arrived today. These things are no joke. They are WIDE.

Mounting them tomorrow and finishing what's left of the 285s up front.

Sweet...yea they're wide!

Just make sure the pressure isn't too high, I'd keep all tires around 35psi or under because A: More volume inside the tires requires less pressure to hold the car's weight compared to narrower tires with less volume. And B: Any camber wear on the 285s that was caused by the rear is gonna be felt at the front with higher pressure as the front doesn't have as much camber as the rear, and the tire is gonna be stepping on the outer, unused part of the tread.

Post the pics when you get them on :tup:

http://www.the370z.com/members/javiz...6580-image.jpg

http://www.the370z.com/members/javiz...6581-image.jpg

http://www.the370z.com/members/javiz...6583-image.jpg

http://www.the370z.com/members/javiz...6582-image.jpg

http://www.the370z.com/members/javiz...6584-image.jpg

http://www.the370z.com/members/javiz...6586-image.jpg

http://www.the370z.com/members/javiz...6585-image.jpg

http://www.the370z.com/members/javiz...6591-image.jpg

http://www.the370z.com/members/javiz...6590-image.jpg

http://www.the370z.com/members/javiz...6592-image.jpg

http://www.the370z.com/members/javiz...6587-image.jpg

Guys, this setup is SICK!! I had my doubts going into this but I can attest to VinceThe1's original post.

Performance:
I've driven about 40 miles since the install. Not a single issue. Turns lock to lock with no rubbing. Driving over speed bumps, no rubbing. The RE-11s on the rear feel amazing. The Nismo naturally has a super stiff ride and this hasn't changed much but I can say that the car feels more planted. The gf says the ride feels "smoother". Haven't taken any hard corners yet but I can't wait to see how the car will eat them up now.

Looks:
Fronts have a tiny poke, maybe 1 or 2 mm. Doesn't bug me at all. Love how the taller sidewalls filled some of the original wheel gap. These were my rear Yoko's (285/35).
Rears are completely flush with the fender. According to the tire size calculator, the sidewall is 2.3% smaller. Can't even notice this. They look massive when looking at the car straight from the back or at an angle.

I'm very happy with the outcome. Can't wait to finish off the fronts now (about 4/32 left with some camber wear) and get even more grip up there. Like I said, I've only driven about 40 miles and so far, so good! I'll keep you guys posted.

Forgot to mention, I bought the RE-11s on ebay, brand new, $535 shipped for the pair. Anyone looking, search a bit, there are deals out there. $400/tire was not gonna happen.

Also, anyone in SoCal's IE, if you are beyond anal with your car like me I highly recommend America's Tire in Riverside on Magnolia. Super cool guys and they took extra care to not scratch my wheels.

Thx for info
I'm IE here too upland
Car looks sweet btw

Congratulations! I love this setup as well, and it's really affordable since it only calls for 2 tires initially (although an expencive 2 tires).

Those sidewall percentages you are looking at are really minute, the difference that matters is the overall diameter (how tall the tire is off the ground) and that's only 0.7% smaller (2.2mm shorter off the ground). That's why you can't notice it, because there's barely a difference. The 325s actually sit right between the Sport Package 275s and the Nismo 285s in overall diameter so you can't go wrong with that diameter.

I also noticed my ride a bit nicer, not as harsh which for our cars I can't say is a bad thing.

One thing that's puzzling me is the poke you have on the front.. Maybe the 285 yokohamas differ from the 285 kumho v12s I have on...but that's quite a difference. My rears are also perfectly flush to the fender without a spacer, but my fronts are about 5-6mm in, I'm really thinking of adding a 10mm spacer for the front because of that. How you have 1-2mm of poke in the front puzzles me...did you do an alignment to straighten your camber even more than original? Could the Nismo have different front suspension arms and/or knuckles...I doubt it but I don't know where that near 10mm difference is coming from on the front, and the rear is just like mine.

Thanks man!