Wheel Fitment and Tire Size Guide

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ffrpwner
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Wheels

First off its Wheels not Rims

Thank You :dblthumb:

Lets start with the stock wheels. Note this setup is for the Twin Turbo model only, all others use the Front setup all around for all four (4) wheels. I will not explain or mention the spare tire/wheel here at all.

Front: 16” x 7.5” 45mm Offset
Rear: 16” x 8.5” 35mm Offset

The First number represents the Wheel Diameter, the second Number represents the Wheel Width. The Third Number represents the Offset.

The Diameter is the final diameter of the wheel, the distance measured from one point on the external circumference, passing through the center of the wheel, to the opposite point on the circumference. In this case, a total of 16 inches.

The Width is the distance from one side or “face” of the wheel to the other side. You usually refer to it as “how wide are the wheels”. In this case, 7.5 inches for the front and 8.5 inches for the rear.

The Offset (and this is when people go nuts) is the distance between the center and the mounting pad. To explain better, is the distance between the wheel center point (width’s center) and the mounting pad of the wheel (the surface that touches the Brake Rotors on the car that has the five holes for the lugs).



The offset can be Negative, Zero, and Positive. Positive will tell you that the pad is to the outside of the center, Zero means the mounting point is at the center, and Negative means the pad is to the inside of the center (so you get a BIG lip).

…………………………………….

To avoid going crazy calculating all this for aftermarket wheels, the first step is to convert all the numbers to one unit. On this case, I prefer to use Millimeters as it is more precise. To convert, multiply inches by 25.4. This means (in case you failed Math in HS) that: 1” = 25.4 mm

When you buy new wheels, you have to determine first what Diameter you want. 17 and 18 is the common for the Z, but you can go higher if you want, just consider that you should keep the final diameter close to the original number (that is, the diameter with the tire).

Then you determine the Width and Offset, and you have to choose both numbers at the same time because they are 100% related to each other and a real good fitment will depend on both of them and not just one.

You should make up your mind on what Width you would like to have, then, find out what Offsets those particular wheels are offered, and then sit down with a calculator and do some math as follow:

Lets take a 17” x 10” 45mm Offset wheel for an example to replace the rear wheels:

- Convert the Width to mm: 10 x 25.4 = 254mm
- Divide it by 2 (to get center point): 254 / 2 = 127mm
- Subtract the offset from it: 127 – 45 = 82mm

Now you have 82mm and that is the distance from the mounting pad to the most outside point of the wheel. Compare it to the stock wheel: 72.95mm. That is about ½ of an inch wider (to the outside only!).

Now subtract the 82mm from the total Width: 254 – 82 = 172mm. This is the distance of from the mounting pad to the most internal point of the wheel. Compare it to the stock wheel: 142.95mm. That is about 1 inch wider (to the inside).

So there you have it, you new wheel is going to stick out ½ inch more than stock, and is going to be 1 inch wider to the inside. Note that those wheels are 1 ½ inches wider than stock, but only ½ inch sticks out, the rest goes to the inside.

Now get under your Z and measure around to see if you have clearance for it or not. If you have a TT, the HICAS will be a problem for 17 inches wheels, so choosing 18 would be better, but in the example above, you could keep 17 if you get a smaller Offset, so the wheel “slides” towards the outside (just like using Spacers). But then you have to consider how much can you get the wheels stick out of the rear fender before if rubs or just looks ridiculous. Or if you have the $$$, get a Wide Body Kit and then all your problems are solved.

There are three more designations for wheels. One specifies the Contour. While there are many details about the wheel contour, most P-metric radials (typical tires, rather than TRX or other rarely-seen variants) will fit a wheel with a J, JJ, or JK wheel contour. (In other word, don’t worry too much about this as most tires out there will fit your wheels).

The second one is the Lug Pattern and Size. For the Z it is a 5-Lug, 114.3mm Radius Circle Bolt Pattern using 12mm X 1.25 Lugs.

The third one is the Center Bore which is the location hole machined in the center of the wheel and this varies from one vehicle to another. It is essential the wheels purchased have the correct center bore for the vehicle they are to suit, otherwise you may experience balancing problems. On the Z, the Center Bore is 66.1

At the end, if you must know (and you should), the entire specs for the Z32 wheels is as follow:

Front: 16” x 7.5” 45mm Offset 5-lug 114.3mm Bolt Pattern 66.1CB
Rear: 16” x 8.5” 35mm Offset 5-lug 114.3mm Bolt Pattern 66.1CB
Lugs: 12mm x 1.25

What size tires can I run?

225/50/16:
width: 8.86"
sidewall: 4.43"
overall diameter: 24.86"
circumference: 78.09"

245/45/16:
width: 9.65"
sidewall: 4.34"
overall diameter: 24.68"
circumference: 77.54"

235/45/17:
width: 9.25"
sidewall: 4.16"
overall diameter: 25.32"
circumference: 79.56"

245/40/17:
width: 9.65"
sidewall: 3.86"
overall diameter: 24.71"
circumference: 77.65"

255/40/17:
width: 10.04"
sidewall: 4.01"
overall diameter: 25.03"
circumference: 78.63"

275/35/17:
width: 10.83"
sidewall: 3.79"
overall diameter: 24.58"
circumference: 77.22"

285/35/17:
width: 11.22"
sidewall: 3.93"
overall diameter: 24.85"
circumference: 78.08"

225/40/18s:
width: 8.86"
sidewall: 3.54"
overall diameter: 25.09"
circumference: 78.81"

235/35/18s:
width: 9.25"
sidewall: 3.24"
overall diameter: 24.48"
circumference: 76.89"

245/35/18s:
width: 9.65"
sidewall: 3.38"
overall diameter: 24.75"
circumference: 77.76"

255/35/18s:
width: 10.04"
sidewall: 3.51"
overall diameter: 25.02"
circumference: 78.63"

275/30/18s:
width: 10.83"
sidewall: 3.25"
overall diameter: 24.49"
circumference: 76.96"

285/30/18s:
width: 11.22"
sidewall: 3.37"
overall diameter: 24.73"
circumference: 77.70"

Suggested tire width when mounted on:
7.5": 225 mm
8": 235 mm
8.5": 245 mm
9": 255 mm
9.5": 265 mm
10": 275mm
note: give or take 10 mm. I.E. you can put 245s or 265s on 9" wide rims.

Recommended combos:
235/45/17 all around (not recommended for TT)
245/45/17 all around
255/40/17 all around
235/45/17 front, 245/40/17 rear
235/45/17 front, 255/40/17 rear
235/45/17 front, 275/40/17 rear
235/45/17 front, 285/35/17 rear
245/40/17 front, 255/40/17 rear
245/40/17 front, 275/40/17 rear
245/40/17 front, 285/35/17 rear
255/40/17 front, 275/40/17 rear
255/40/17 front, 285/35/17 rear
245/40/18 all around
255/35/18 all around
245/40/18 front, 285/30/18 rear
255/35/18 front, 285/30/18 rear
235/45/17 front, 255/35/18 rear
235/45/17 front, 285/30/18 rear
245/40/17 front, 255/35/18 rear
245/40/17 front, 285/30/18 rear
255/40/17 front, 285/30/18 rear



Thank You to ZCRZY on tt.net for the Wheel section

Thank you to got rice? on tt.net for the Tire Section
Post up side views of different wheel fitments then label each picture for
-Tire size
-Wheel size
-Wheel width
-Offset

No side conversations aka "nice Wheels" or "what wheels are those" and certainly don't ask "will these Wheels fit" that would defeat the purpose of this sticky

Again!!!

We are talking about WHEELS not RIMS :dblthumb:

http://www.rimsntires.com/specs.jsp Another handy site for checking wheel fit.


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ffrpwner
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No problem man go ahead! im working on a couple more article worthy threads right now as well

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ArticDragon192
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ffrpwner wrote: What size tires can I run?
Recommended combos:
235/45/17 all around (not recommended for TT)
245/40/17 all around
255/40/17 all around
235/45/17 front, 245/40/17 rear
235/45/17 front, 255/40/17 rear
235/45/17 front, 275/35/17 rear
235/45/17 front, 285/35/17 rear
245/40/17 front, 255/40/17 rear
245/40/17 front, 275/35/17 rear
245/40/17 front, 285/35/17 rear
255/40/17 front, 275/35/17 rear
255/40/17 front, 285/35/17 rear
245/35/18 all around
255/35/18 all around
245/35/18 front, 285/30/18 rear
255/35/18 front, 285/30/18 rear
235/45/17 front, 255/35/18 rear
235/45/17 front, 285/30/18 rear
245/40/17 front, 255/35/18 rear
245/40/17 front, 285/30/18 rear
255/40/17 front, 285/30/18 rear



Thank You to ZCRZY on tt.net for the Wheel section
I found a few errors in your tire recommendations. I bolded them. When staggering with a 235/45-17 front, you'll be ending up with a tire up front that is significantly taller than what is in the rear. Not only will it look funny, but it will also take away wheel/tire clearance up front significantly. A better size would be a 245/40-17 up front, or a 235/40-17.
Also, with 245/35-18s all around, you'll have a tire that is shorter than stock, which will look a little off on such a big car, and lower the car more than stock, as well increase the fender gap.

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WhiTTe Z
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i think you should put something in here about what wheel widths you can safely run in the rear of a TT with and without HICAS

Jehtte
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I'm running all four 245/35-18s,(8.5 wheel width) and I love the look. Also note, my front is lowered by a lot. It was that way when I got it, and I'm not sure by how much.
Image
156 by Jehtte, on Flickr

Pic related it's my car.

Also, 45mm offset all around.

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Storm_Z
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i was wondering (looking at a sexy new set of wheels) if 245/55/18s would fit, my buddy is parting out his supra and the bolts match up, he said i could have them with the new low pro rubber included if they fit... :) *crosses fingers* im hoping

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Ace2cool
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....Why not upgrade? 245 is the stock size for a Z32 TT's rear. Also, to tell if they "will fit," we have to know the offset. I'd almost guarantee anything that fits a Supra will fit a Z though. That is a TON TON TON of sidewall on an 18 though. Take a look at this comparison between the stock size and the one you listed:

Image

Also, your signature is entirely too big. Please not forum rules regarding signatures are 600x200 pixels.

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BigTDogg (MA)
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Those 18's don't have a chance of fitting. Way too tall.

On the last set of 18's stagger...

255/35/18 and 285/30/18 is a better combo than the 40 series up front.

Kushpushk
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so could you do a 245/50/16 on all fours on a Na

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Ace2cool
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With 8.5" wheels, yes. Not with the stock 7.5" wheels though.

Also, those tires are gonna be taller than stock, so not only will it look a little goofy, but it will also cause your speedo to read a little bit slower than your actual speed.

faked00r
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Thank you for the information m8 :)

veaterszx
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Can you fit a 18x10 wheel.in the front with an 35mm offset?

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Nismovs
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So I know Edgar mentioned that at 235/45/17-255/40/17 the stagger will have the front tire taller than the rear, but how bad would this be? I am able to get a good deal on a set of 17x7 +29 fronts and 17x8 +38 rears LMGT2's for pretty cheap, but i'm not sure about the tire size and how odd it will look.

BlackWidowZ
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Nismovs wrote:So I know Edgar mentioned that at 235/45/17-255/40/17 the stagger will have the front tire taller than the rear, but how bad would this be? I am able to get a good deal on a set of 17x7 +29 fronts and 17x8 +38 rears LMGT2's for pretty cheap, but i'm not sure about the tire size and how odd it will look.
I wouldn't buy those rims . They are nice but its a bad fitment in my opinion. Reason is they wont sit flush and they will look very small, if you want them to sit flusher you will need spacers on the front and the rear and they still might be far inside after spacers. If you decide to do buy them anyways. Then I would do something like 235/40 and 245/40 :werd:

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Nismovs
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I don't need them to sit flush and they already have brand new potenza tires on them which is why I'm asking

BlackWidowZ
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Nismovs wrote:I don't need them to sit flush and they already have brand new potenza tires on them which is why I'm asking
The fronts will look taller than the rears no doubt about it, but it might be so small a difference that you wont notice since there is more weight in the front im guessing try going here and input the values for the front in the left side and the values for the rear in the right side and see http://rimsntires.com/specs.jsp Also a 255 on a 8 inch wide wheel will look bubbled same with the front it will be bubbled looking. Those are big tires for small widths.

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Nismovs
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Yeah they are a little bubbled. I've seen them in person and for the price i figure they will be better than stock while the car is being built up and 3 different colours lol. Thanks for the link btw

edit: Just put the numbers through and it's only a 8mm difference so it should be barely visible

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Ace2cool
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Not just that, but why would you do sizes smaller than stock? Just saying.

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Nismovs
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I have a N/A with almost bald 225's on all four corners. so for me this would be a bit of an upgrade and I can always sell the wheels once they are cleaned up and I have the money for the ones I actually want.

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Ace2cool
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Or you could buy tires and have a better upgrade.

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Nismovs
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I understand where you're coming from, but the lm's already have brand new bridgestone potenza RE-11's on them. average price on those are around $200 a piece without really looking hard. I can get these tires and wheels for the same price as just the tires. They need to be cleaned up a bit so for around a $1000 I'll have a combo that I can run on, and this car is not a daily and will barely be driven this summer due to body work and building it up. Since I wont be driving the car much, I could always sell the tires used and sell a clean set of LMGT2's to pay for proper fitting varrstoens(even though they are copy-cats) until I do the swap and can afford a set of Gram lights or LMGT4's

Image

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Ace2cool
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I mean, I see where you view it as an investment, but those are gonna be hard to get rid of in those sizes. I'm just trying to save you some headache down the road. A set of stock sized sticky tires would do better things for handling, and your stockers would honestly sell quicker than those.

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MellowZ32
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Nismovs wrote:I could always sell the tires used and sell a clean set of LMGT2's to pay for proper fitting varrstoens
Image

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Nismovs
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I have a line on a set of mint Z wheels, all 7.5" with alright rubber for around 200, would that be a better option?
Mellowz32: Yes I'm aware I was talking about a knock-off wheel, thanks for not including that part in your quote...As much as I am against knock-off parts, sometimes exceptions can be made.

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Ace2cool
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Depends on the rubber brand/style and percentage, but so far, sounds like a better option.

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ChaseOfSpadeZ
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Nismovs wrote:would that be a better option?
By far a better option! Don't waste the time with these wheels.
Nismovs wrote:Yes I'm aware I was talking about a knock-off wheel
Don't let them bother you, some people are hardcore purists. Varrstoen's will do just fine. Unless you track all the time or live somewhere where the roads are complete sh*t, buying a decent set of wheels from a reputable "knock-off" company like Varrstoen can save you THOUSANDS over buying genuine Ray's or the like.

Personally, it's hard for me to convince myself that the extra $3-4k I could have spent on a rebuild, turbos, injectors, etc, is better spent on having authentic Ray's.

But, I'll probably get crap for that too, lol.

BlackWidowZ
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nvr dude, true story i got a good deal on some rays, but they were z33 lmgt4s not like these.. and after i felt how light they were and saw how pretty they were i wouldn't of not got them. :chuckle: Varrstoen's 18x9.5s dont weight 17/18 pounds. ;) But back on topic ya dude just get some new tires or do it right, cuz your going to have big problems selling those wheels. Thats probably why they are such a good deal but trust me its toooooo good a deal thats why. even hondas can sport bigger rims than those rays so glws :nono:

Drewskates247
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Image

I have 255/35/18 Volk TE37SL's and I couldn't be happier

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BigTDogg (MA)
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^^ I fixed your post. Do "copy image location" and past that between the IMG tags.

What size wheels? The size you listed is fro the tires. car looks great BTW

Drewskates247
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BigTDogg (MA) wrote:^^ I fixed your post. Do "copy image location" and past that between the IMG tags.

What size wheels? The size you listed is fro the tires. car looks great BTW
Thanks for that!

The wheels are 18x9.5. I need to get rid of my wheel gap though :rolleyes:


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