Yes, and I'm running the OEM rear 285s in the front without issue so yes, the Z DEMANDS more rubber :)

Oh I know about you Rusty, you're one of the only (if not the only) person on this thread to wear as wide as 345...I would do it if I had the wheels for it but my 10.5" can only take so much. (no pun intended ;))

im fine with 285 on my nismo 10.5"

Ken, got a picture how she looks with the nismo wheels and no spacers on our non nismo? I'm currently using 20mm spacers all around on my sport wheels but switching to the nismo wheels soon, I'd like to go without the spacers if it isn't too sunken in if you know what I mean. Pm me please!

Well, YOU said your next mod is wider wheels, not me ;)

I'm fine with my 10.5" as well!

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!

No alignment. I'm really not sure if I have different arms but I've heard the Yoko's run wider than a lot of tires. The poke is barely noticeable though, you really have to stare at it to notice. I plan on throwing RE-11s up front after these so we'll see how those sit.

What does everyone think about just keeping the front OEM 245/40-19 and widening up the rears to 325/30-19?

That's way too big a difference between front and rear.

What would the draw backs be?


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More probability for oversteer

More under steer. The fronts will lose grip before the rear.

Why you should use these tires with NISMO Wheels: 285/35R19 (F), 325/30R19 (R)
 

My research says understeer because the rears push harder but how bad would it be?


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Where are you researching?

Sorry, corrected.


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if you do anything, widen the front to 265/35/19 and leave the rear stock. It works well.

I kick myself everytime I read this thread, I should have put my 285's up front and put 325's on the rear.

Yea that's what I meant.

I have some base 18s laying around with the stock 225/50R18s they come with (front)...I should try putting them on the front and leaving the 325s in the rear to see if the 100mm difference would cause understeer. However, I doubt it since that's mainly based on the car's characteristics/weight distrubution/chassis than on the tires it has on. Width doesn't give you more grip, grippier tire compound does. So if you have grippy 225s in the front and not so grippy 325s (hard or impossible to find a non-sunmer tire in that size), you'll get oversteer, and if vise versa, you'll have underateer. If both front an rear are the same tire but just different size, the size difference wouldn't really affect the handling... Atleast not before a few hot laps where the narrower tires have a chance to heat up more and eventually overheat quicker, although being in the front of a RWD car wouldn't really affect them as much. This is why performance RWD cars call for a staggered fitment, so that the wider rear tires deal with the heat and wear better, while the front stay cooler and don't need to be as wide in comparison.

I though of doing that myself, however, the 245s on the 9.5" wheel look almost stretched, with the lip fully exposed. In comparrison to the rear, It wouldn't look right. With the 285s upfront, the front looks beefy and the in the rear, the 325s are even beefier. :tup:

Also, fat tires ftw!

If you really want to do that, just install 325s in the rear but keep your 285s. If you don't like the look/feel, replace the 245s with the 285s...you've got nothing to loose :driving:

That sounds plausible.

In other news, how was the difference in tire working out? I mean the ADVAN Sports are a very good OE tire, but how do they match-up with RE-11s? Did it handle good or under/over steer?

Scary...now if I install 10mm spacers in the front and my next, replacement 285s are like your Yokohamas, I'll have to remove the spacers haha

The way I look at it:

245 to 285 = +40mm width increase in the front
285 to 325 = +40mm width increase in the rear

So far, nearly 10k miles on this setup, on my otherwise worn out rear tires (camber wear). However, at the front they can keep on rolling on their unworn, outside portion of their tread for a quite a while longer...atleast another 10k I'd say. That's 20k on otherwise garbage rear tires, not bad...only problem is I can only do that once. Can't move the 325s in the front when they wear out lol :)

I've only driven about 50 miles with the RE-11s and I can definitely notice the improvement in grip on the rear. Car handles amazing and once I replace the Yoko's up front with RE-11s I expect to feel the difference there too.

http://www.the370z.com/wheels-tires/...ew-inside.html

All, After having read this thread, I followed the wider tire advice. I went with Hankook Ventus Evo2s all around. I used the 265/35ZR19 up front and the 305/30ZR19 in the back. Plenty beefy as tires go. Very good grip in the wet. It's been raining here in North Texas for the last 7-10 days. The tracking is very crisp. I got a fresh alignment due to the toe wear on all 4 OEM tires. The OEM Bridgestone S001s lasted 19400 miles (Surprised even me). Steering effort with the Evo2s is nice and light at speed. Not overly stiff at crawling speeds.

Just my $.02 worth.

Tip of the hat to VinceThe1 for a good write-up and suggestion. My '14 Nismo thanks you as well.

Im considering this mod to get the beefier look as well on my 2015 Nismo with stock Rays wheels.. I wont be using spacers but i do want to install Swift springs. From what im reading i should be flush but at stock height. I didnt catch if your car was dropped or not.
What should i expect? Is it possible to lower the car on this setup without rubbing. Camber?