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Changing Tire Size

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Old Mar 4, 2003 | 06:43 PM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
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Anybody know of a problem with using 245/40ZR17’s and 275/35ZR18’s on a 99 vert. :confused:


Thanks



[Modified by budmont, 11:29 PM 3/4/2003]
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Old Mar 4, 2003 | 09:57 PM
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Default Re: (budmont)

Is there a question here?
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Old Mar 4, 2003 | 10:19 PM
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Default Re: (jrz01)

Is there a question here?
damn and I had an answer!!!!
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Old Mar 4, 2003 | 11:25 PM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
Default Re: (jrz01)

The question was “Is there a problem with using 245/40ZR17’s and 275/35ZR18’s on a 99 vert. After 30 views and no responses I figured the question was to hard, so I took it off. But since you asked I'll put it back!

Thanks for the reply!


[Modified by budmont, 11:31 PM 3/4/2003]
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Old Mar 5, 2003 | 12:11 AM
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Default Re: (budmont)

Anybody know of a problem with using 245/40ZR17’s and 275/35ZR18’s on a 99 vert. :confused:
Since those sizes are not so far off from stock... you'll have no probs... :D But I gotta ask... why not go bigger :confused:
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Old Mar 5, 2003 | 06:46 AM
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Default Re: (budmont)

I have the Nitto 555 Extreme 255/40/ZR17's in front and 285/35/ZR18's in rear on stock size OEM Y2K wheels. Fit and look great with no clearance problems. Adjust for the overall height difference with a Hypertech PP3. (approx .61" in front, .65" in rear)
:seeya
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Old Mar 5, 2003 | 08:16 AM
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Default Re: (budmont)

Compared to the OEM size 245/45-17 front and 275/40-18 rear, your new ones will be smaller, regarding Miata tire size caculator 3.8% too small in front and 4.1 % too small in rear. That´s the math. I do not know if other parts beside odometer (speedgauge) will be influenced.
Hope this helps a bit
Frederik
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Old Mar 5, 2003 | 09:39 AM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
Default Re: (99C5Richie)

Anybody know of a problem with using 245/40ZR17’s and 275/35ZR18’s on a 99 vert. :confused:

Since those sizes are not so far off from stock... you'll have no probs... :D But I gotta ask... why not go bigger :confused:
I can get them for $25 each :hurray:

Thanks to all for their input :D
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Old Mar 5, 2003 | 09:45 AM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
Default Re: (C5 Frederik)

Compared to the OEM size 245/45-17 front and 275/40-18 rear, your new ones will be smaller, regarding Miata tire size caculator 3.8% too small in front and 4.1 % too small in rear. That´s the math. I do not know if other parts beside odometer (speedgauge) will be influenced.
Hope this helps a bit
Frederik
Frederik, what is that Miata tire size calculator you mentioned. I know the sidewall is smaller but will this also effect the width :confused:


[Modified by budmont, 10:06 AM 3/5/2003]
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Old Mar 5, 2003 | 09:56 AM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
Default Re: (Mike98SilVert)

I have the Nitto 555 Extreme 255/40/ZR17's in front and 285/35/ZR18's in rear on stock size OEM Y2K wheels. Fit and look great with no clearance problems. Adjust for the overall height difference with a Hypertech PP3. (approx .61" in front, .65" in rear)
:seeya
:iagree: Tires do look great :cool: Thanks for the info on the height difference, I never thought of that. I have a Hypertech PP3 which I haven’t used yet. I'll be sure to use your data when everything goes on. :hurray:
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Old Mar 5, 2003 | 09:59 AM
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Default Re: (budmont)

The sidewall will be too small IMO. I would say no :)
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Old Mar 5, 2003 | 10:17 AM
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Default Re: (budmont)

Frederik, what is that Miata tire size calculator you mentioned. I know the sidewall is smaller but will this also effect the width :confused:
[Modified by budmont, 10:06 AM 3/5/2003]
Go to http://www.miata.net/garage/tirecalc.html
There you can compare two tires in diameter/circumdingsbums?
This has nothing to do with width, OK? But part of the complete diameter of a wheel is a percentage of the width. i.e. 275/40 means hight of the rubber/tire itself is 40% of 275 (width)
Sorry if I was too complicated. If any question, please ask.
Frederik
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Old Mar 5, 2003 | 11:34 AM
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From: hamilton nj "Life's tough......It's even tougher if you're stupid."-John Wayne
Default Re: (C5 Frederik)

Frederik, what is that Miata tire size calculator you mentioned. I know the sidewall is smaller but will this also effect the width :confused:
[Modified by budmont, 10:06 AM 3/5/2003]

Go to http://www.miata.net/garage/tirecalc.html
There you can compare two tires in diameter/circumdingsbums?
This has nothing to do with width, OK? But part of the complete diameter of a wheel is a percentage of the width. i.e. 275/40 means hight of the rubber/tire itself is 40% of 275 (width)
Sorry if I was too complicated. If any question, please ask.
Frederik
Thanks :cheers:
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Old Mar 5, 2003 | 12:10 PM
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Default Re: (budmont)

how "wide" can you get on a vette tire without changing rims? :conehead
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