Real quick last minute question-tire size
07-07-2009, 02:33 PM
#21
Since the front wheels turn (and therefore go outside the wheel well), it is overall diameter that makes the difference and not the tire’s width. 225’s or even 265’s (some guys mount 275's on the front) with stock overall diameter will work fine on the front. That’s true even with a very aggressive offset. Notice that you don’t hear much about doing fender rolling on the front.
I suppose if you went with a really high offset (maybe 40, 50, or more), you could have trouble with scraping against suspension components, but that would happen with 225 or 265 tires.
--Spike
I suppose if you went with a really high offset (maybe 40, 50, or more), you could have trouble with scraping against suspension components, but that would happen with 225 or 265 tires.
--Spike
07-07-2009, 02:35 PM
#22
Vendor - Former Vendor
My bad. +1 on 265's. I've sold that size but not sure if others have had VDC issues with it. All the 285 rear fitments we've seen have used 19's up front as well.
Last edited by neal@tirerack; 07-07-2009 at 02:37 PM.
07-07-2009, 08:00 PM
#23
Neal, thanks for the input. Regards to the VDC issues, the Nismo edition 350z does not have VDC, just traction control. Being that its more of a track-bred vehicle, perhaps the intrusions of VDC, or the ability to do more with the car, didnt allow VDC to be necessary? Id do 255/40 up front, but the Bridgestone RE-11's dont come in that size, with the 40 profile. I just want to be assured that I can fit 265/40/18 on a 9 inch rim in the fronts and 285/35/19 on a 10 inch rim in the back, Neal.
07-08-2009, 02:22 PM
#28
Sponsor
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I have a nismo with RE-11s and run 265/35/18 and 265/35/19.
At the time, 285/35/19 was not available. If you wish to run closer to stock settings, 265/35/18 and 275/30/19s would be a closer match IIRC.
07-08-2009, 07:22 PM
#30
265/35/18 is the correct size for the front. The rears are your call.
I have a nismo with RE-11s and run 265/35/18 and 265/35/19.
At the time, 285/35/19 was not available. If you wish to run closer to stock settings, 265/35/18 and 275/30/19s would be a closer match IIRC.
I have a nismo with RE-11s and run 265/35/18 and 265/35/19.
At the time, 285/35/19 was not available. If you wish to run closer to stock settings, 265/35/18 and 275/30/19s would be a closer match IIRC.
07-08-2009, 07:58 PM
#31
New Member
^^ A lot of people don’t get this. Metric tires sizing 101
The metric tire sizing system represents a tire size as:
[section width (mm)] / [aspect ratio] - [rim diameter (inches)]
For example: a tire size 225/45-18 is 225mm wide, has an aspect ratio of 45 and fits an 18" rim (wheel).
The aspect ratio (the second number) is not a measurement. The aspect ratio represents the tire's sidewall height as a percentage of the tires width (section height divided by section width). In the example above, the sidewall height is 101mm (101/225=45).
The aspect ratio is important since that (along with the wheel size) determines the overall diameter of the tire allowing you to match your stock overall tire height (diameter). For example, a 225/45-18 tire's sidewall height is 101mm, and a 245/40-18 tire's sidewall height is 98mm.
So, both tires have nearly the same overall diameter.
If the tires are on different size wheels (i.e., 18” vs.19” wheel), the [aspect ratio] will be less on the 19” wheel if the tires are the same width and are the same overall diameter. For example a tire that is 245/40-18” will have close to the same diameter as a 245/35-19” tire.
If you want to maintain about the same sidewall height front to rear on a Z, you mount 18” wheels on the front and 19” wheels on the rear to accomplish a staggered height front to rear (about 1” difference). Examples of tire sizing here would be 245/40-18” front and 275/35-19” rear (the overall diameter varies about an inch to meet the Z’s staggered size front to rear).
--Spike
The metric tire sizing system represents a tire size as:
[section width (mm)] / [aspect ratio] - [rim diameter (inches)]
For example: a tire size 225/45-18 is 225mm wide, has an aspect ratio of 45 and fits an 18" rim (wheel).
The aspect ratio (the second number) is not a measurement. The aspect ratio represents the tire's sidewall height as a percentage of the tires width (section height divided by section width). In the example above, the sidewall height is 101mm (101/225=45).
The aspect ratio is important since that (along with the wheel size) determines the overall diameter of the tire allowing you to match your stock overall tire height (diameter). For example, a 225/45-18 tire's sidewall height is 101mm, and a 245/40-18 tire's sidewall height is 98mm.
So, both tires have nearly the same overall diameter.
If the tires are on different size wheels (i.e., 18” vs.19” wheel), the [aspect ratio] will be less on the 19” wheel if the tires are the same width and are the same overall diameter. For example a tire that is 245/40-18” will have close to the same diameter as a 245/35-19” tire.
If you want to maintain about the same sidewall height front to rear on a Z, you mount 18” wheels on the front and 19” wheels on the rear to accomplish a staggered height front to rear (about 1” difference). Examples of tire sizing here would be 245/40-18” front and 275/35-19” rear (the overall diameter varies about an inch to meet the Z’s staggered size front to rear).
--Spike
07-09-2009, 08:30 AM
#32
Sponsor
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Works Concepts
Sensi, this thread is opening my eyes for many new things and ideas. I can run a lower profile in the front and back? I mean i understand that the wider the tire gets, its proportionate to the profile. I am assuming that when you have a 275 width tire, with a 30 profile, its similar to the 265 with a 35 profile? This is very interesting. Again, sorry with all the posts and questions, I just want to make a very well informed decision so that everything runs smoothly. Thanks!
Compare stock sizes to the sizes you wish to run. Overall diameter is the main thing you wish to look at and see how it compares to stock, along with front/back ratios....etc.
07-13-2009, 07:30 PM
#33
New Member
Motormouth… I participated on this thread… you decided to “flame me,” and I respectfully responded, but you never answered.
So… Would you kindly provide an answer to the OP’s question (instead of just saying that he should: “Do not listen to this guy”).
Telling everyone to ignore advice and not providing a solution or an alternative isn’t helpful.
--Spike
So… Would you kindly provide an answer to the OP’s question (instead of just saying that he should: “Do not listen to this guy”).
Telling everyone to ignore advice and not providing a solution or an alternative isn’t helpful.
--Spike
07-13-2009, 09:30 PM
#34
Motormouth… I participated on this thread… you decided to “flame me,” and I respectfully responded, but you never answered.
So… Would you kindly provide an answer to the OP’s question (instead of just saying that he should: “Do not listen to this guy”).
Telling everyone to ignore advice and not providing a solution or an alternative isn’t helpful.
--Spike
So… Would you kindly provide an answer to the OP’s question (instead of just saying that he should: “Do not listen to this guy”).
Telling everyone to ignore advice and not providing a solution or an alternative isn’t helpful.
--Spike
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