What you said about not using the whole tread is true and actually very beneficial to me. The 370Z calls for heavy camber in the rear (compared to let's say, a sedan), so his actually helps a lot with camber wear. The 285s that came with my wheels were like new amd in less than 10k (of my driving), the inside was bald while the outside looked nearly new. With the 325s, nearly 2 years and 25k later, I still got plenty of tread on the inside and much less camber wear overall. :tup:

As far as traction goes, wider tire doesn't give you extra traction, the compoind of the tire does. A wider tire gives you a wider contact patch, but a shorter one. Also, even if you go get a larger contact patch you still don't get more traction as the weight of the car just gets distributed more evenly over the lager area so each square inch has less pressure on it so less traction, but it's compensated with the extra surface area.

The one true benefit of wider tires is less heat and less stress per square inch = less wear. There are drawbacks too like added weight, easier hydroplaneing, extra cost, and internal wear/skipping on sharp corners (not noticeable for the most part)

I chose the wider tires as for me, they have much more benefits than drawbacks.

Hunh, the guy that has done 2 sets of tires for me in this size RE11's hasn't had any issues at all. Never said a pep about it.

Excellent :tup:

275 or 285 in a 30 aspect ratio would of been way small

Did he mount them on the front or the rear? On what size wheel?

Not sure what your guy mounted but I'm refering to the 325 rear going on a 10.5 Nismo Rays. I went to a pretty reputable installer and they came to get me from the lounge to explain why it was taking so long. They just said that the sidewall was giving them hell mounting it. It was'nt impossible just not a standard mount.

Well you do have a valid and true point. Before I knew that I could even fit 325/30R19s on my rear Nismo wheels, I bought an old, used set of Goodyear Eagle F1 Supercar "Runflat" tires for $120 on eBay.

I went to Discount Tire, as well as many other places to try and mount them and they couldn't do it, all they did is damage the beads of the tires. These runflat tires don't require special wheels, but because their sidewall is so stiff (in order to run without air pressure), the beads couldn't pop on my wheels as they would have on wider and/or different barrel design wheels. I almost gave up on the idea until the guy at discount tire checked the computer and said that they could fit 325/30R19s not only on the Nismo wheels, but on the Touring Sport wheels as well. I told him I find that hard to beleive but since they agreed that if they don't fit they'll take back the tires I bought from them, i ordered a set of the Cooper RS3S (they're not on their website and they don't offer them first hand, you gotta ask them to dig deeper and they'll find them). That tire fit without issues. It really depends on the tire I guess if it can fit easily, difficultly, or not at all.

To whoever wants to do this, i highly recommend the Cooper RS3S because they cost 1/2 what every other tire this size costs (~$180 a piece), have decent traction, and last a long time (over 2 years and 20k now and still plenty of tread, and I slide around all the time). Excellent tire at an excellent price. I have RE-11s at the front now for maximum cornering and braking grip, and the Coopers in the rear that allow for a playful rear end :D

First to do this with 19" Sport rims?
 

First - Thx to VinceThe1 for paving the way for all of the Nismo owners out there and inspiring all of us 'go wide or go home' guys! I'm going for this using sport rims which are 1/2" narrower. I have 285/35 SO4s on the back now which will move to the front 9" rims. I'm ordering the same 325/30 RS3-Ss on the back. The race shop I'm dealing with says they should fit fine on my 10" rims and claim they've done this before on 19x10 mustang rims.

The car is currently lowered on swift springs. I'm very confident of the fit and clearance but trying to figure out how my 15mm and 20mm spacers with studs will work out. The front should be fine but the 285s on the back now are very close to flush with the 20mm spacers. The 325s will have some pucker so we'll just have to see. I might have to swap the front 15mm spacers to the back to pull em in a bit. I should have plenty of room to move the 20mm spacers to the front if I need to. If this happens, I''ll have to figure out if or how the studs will work. H&R says they are 45mm and 50mm respectively and that I need at least 10mm of length for the 7-8 turns needed for the lug nuts to be safe. I'm confused since I read on here the stock studs are only 42mm! This doesn't make sense for the fronts with only 3 more mms of length to cover a 15mm spacer???

Can anyone verify the stock stud length and clarify the mix of sport wheel offsets and spacers vs the Nismo wheels to make sure what I have will work? :ugh2:

Anyone lowered with this tire setup? Was wondering if people will rub with a lowered car.

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I use ARK GT-S springs 1.4fr 1.2r drop and I have zero issues with rubbing.

Thanks for this write up Vince!

I have a 2013 Roadster with 19" Rays, will my setup work with 325's in the rear and 285's up front?

265 front
305 rear

That is as wide as you can reasonably go on sport/roadster rays. They are narrower than the nismo wheels

I have this setup with the Sport Rays. Disregard others who say they are too wide. A half inch difference in width
(1/4" on each side) is not going to matter. I'm at #167 above and here are the 'after' pics at post #966 on the "wide tire thread":

http://www.the370z.com/wheels-tires/...thread-65.html

Differences in tire design / width can effect the ability to run this. Some tires are known to be wider. For instance a nitto invo tire in 345 has specs identical to a 335 in other brands.

Not to mention, the ability to do something doesn't make it a good idea. There is a reason for the manufacturer recommended wheel specs. Pinching a tire too much can change the cross section. Just as stretching it does.

I tend to prefer wider rubber on wheels but tend to stick to the narrowest wheel recommended for a given tire size (i.e. if they recommend 10-11" I go with a 10" wheel). Since they are stock wheels you will be going the other direction and trying to fit the max width for your wheels.

You can check out my build thread for photos of my old meaty setup. I had 325s on 11s and felt like an 11.5 would be better suited to the tire.

Ordered my new rear RE11 325's today at Discount Tire. Current rear 285's will be moved up front. Will take pics once mounted.

:happydance:

Stock 2014 Nismo suspension pictured.

http://i66.tinypic.com/sfwml2.jpg

Loving this setup.

I am ordering some RE-11 325's, tomorrow. Whats the good price from discount tire?

Was planning to purchase online cheap, and haul them down to the local tire store for mounting and balancing!

Also, I have zero rear camber. I am sweating bullets to determine if these 325's will rub on the rear fender wells on big dips. The top of the tire moves out considerably when the negative camber is removed. I did this with the intent of running Nitto 305's, which would clear according to my calculations on a Nismo wheel.

I want an even load across the tread face. Notice how the outside edge (1/2"-1"???) is not even touching the pavement in your pic.

Either way, its an awesome setup for sure!

I hope you have more luck than I did with finding them cheaper. I found them at Discount Tire for ~$340 a piece for the rears. I hear you can stalk deals on them, but I have waited for months and havent seen any 325/30/19 deals myself.

Thx NVSTR!

$331 a tire delivered, is the best deal I have found so far. Then, I have to pay M&B.

https://www.tires-easy.com/tires/325...nd,Bridgestone

Nice! I have seen some past posts about them popping up on ebay too much more discounted... but I wanted them ASAP so I just went to discount. I will have to remember this site though!

-Justin

Thanks to Vince!

I was wanting to try this after reading this thread about 100 times....

Ordered the Nismo wheels and the RE-11 tires figuring they would be a really, really tight fit. Well...it turned out really well.

The car rides and drives fantastic! Smooth, quiet and I couldn't be happier with these big RE-11s. Straight line hook is much improved as well. Car will still spin some in first gear and sometimes a little second with the 7AT, depending on road surface conditions. Before, with the RE760s would be everywhere, spin and squeal into third gear.

Those POS RE760 tires were JUNK!

I have just a slight amount of poke, maybe 5 mm. I have installed the lower adjustable camber arms and have my rear camber set at -.7 degrees in the pics. I really like this setting. Car is a joy to drive!

There is no rubbing, why? Because the control arms on the 370Z are so short, that the tire rotates (tips) into the wheel well on compression (bump) of the spring.

Great mod!

Installing the 285 in the front with 305 in the back :ughdance:

https://lh3.googleusercontent.com/uN...=w1168-h657-no
https://lh3.googleusercontent.com/81...H=w370-h657-no

here the 285 on 9.5. POTENZA RE11

https://lh3.googleusercontent.com/TP...v=w370-h657-no

How are you getting better fuel economy? That seems to defy physics... Larger contact area yields more friction, thus more rolling resistance(i.e. Traction). If your logic were true Toyota would be putting 255's on Prius's...

Increase in weight...rotational mass as well. I got to get me some of those tires lol! :eek:

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I love mine. I have over 40k miles on my front RE11 285/35/19 and they are half gone. The rears only last me 20-24k miles. But that is all Interstate driving. Very easy on the tires.

You got drive harder lol!

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Kinda hard when you live in the straight and flat land.

Well don't tell me you don't know how light this bad boys up. I know burning rubber get old but it is still fun!

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I love donuts....LOL I need to put a switch in to disable the dang yaw sensor.

Lol, that is next on my to do list!

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Following Up
 

This combination has lived up to expectations fully. No problems, no rubs, and all smiles here :rock:

Just bought some RE11 in this size from discount tire and it looks amazing. Thanks for this thread.

what???? context? a 245 has a smaller contact patch than a 285 tire it is a overall larger surface area.

Yes the amount of weight and air affects how much the tire will touch the road. but all things being equal, a 285 is wider surface area.

note- -sorry for bumping old post

What alignment settings is everybody running with these meaty tires? How bad is the understeer ?

.....

I'm not stock. A lot of SPL parts. Bigger sway bar. Bigger rear tires. Very little understeer when driving 9/10's on the track. Wondering what it will be like with the OS Giken LSD. Here's my settings.

Alignment;
Front, -2 camber, +7 caster, 1/16" toe in
Rear, -1.75 camber, 1/16" toe in.

Thanks Rusty. I was considering going the Meaty route but was mostly concerned about the understeer. I too have almost all of the SPL parts, and exactly the same alignment as you, only thing missing is a heavier Front swaybar.

How will these meaty tires work for spirited driving and canyon carving?

You won't have a problem if you use good tires. PSS's and the like. And don't drive above 8/10's on the street. If you get understeer on the street. You're running to hard.

No understeer issues here. It loves canyon roads. The only time I have had any understeer is when I was pushing to hard on the dragon and got the fronts too hot. I had to back off a little bit.

Can one safely fit 325’s on rear sport wheels? Sorry haven’t read through entire thread yet. At the tire shop and checking out my options.