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Is there any reason for running thicker tires in the front then the rear?

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Old Oct 27, 2006 | 12:42 AM
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Default Is there any reason for running thicker tires in the front then the rear?

I sometimes see tire setups that have tires that are thicker in the front. I.E. running say 245/35/19 in the front and 275/30/19 rear. Is this for handling purposes? Is it recommended to do that?
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Old Oct 27, 2006 | 03:12 AM
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yes handling and for looks
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Old Oct 27, 2006 | 03:48 AM
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It keeps the snowplow blade more firmly on the ground
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Old Oct 27, 2006 | 04:24 AM
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You mean wider not thicker.
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Old Oct 27, 2006 | 04:28 AM
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It's mainly for looks. 245 is the size in mm. and 35 is the percentage of the 245... so roughly the side wall is 85.75mm for the fronts. So to look even or achieve the same diameter for the front and rear, the rear tires side wall be 82.5mm if you choose a 275/30 rear tire, making it only a 3.25mm difference from the front and rear... on the other hand, some will argue it is to achieve the same total diameter as the factory settings (245/45/18), because changing the total diameter may change the odometer and/or speedometer true reading. I went with 285/35/19 for my rears. I mainly did that to see how wide is can have them back there with out rolling my fenders. Either way you look at it. it's mainly personal preference. Hope this helps!
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Old Oct 27, 2006 | 04:45 AM
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only reason you'd EVER run wider in the front than the rear is if you had a FWD car to counter the severe understeer.
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Old Oct 27, 2006 | 04:48 AM
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He didn't mean wider....like tread on the ground. He was talking about the sidewall thickness....rpacman nailed....thanks!
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Old Oct 27, 2006 | 04:51 AM
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Originally Posted by chimmike
only reason you'd EVER run wider in the front than the rear is if you had a FWD car to counter the severe understeer.
THICKER not wider... reading comprehension is key
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Old Oct 27, 2006 | 06:44 AM
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On a Z with VDC or TCS you are asking for SLIP light trouble if your backs are a smaller diameter than the fronts.

Chris
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Old Oct 27, 2006 | 06:55 AM
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Originally Posted by tsukaz
THICKER not wider... reading comprehension is key
tires don't get 'thicker', they either get wider or taller or both. Correct wording is key.
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Old Oct 27, 2006 | 07:33 AM
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Someone once had mentioned on here to run a 35 series in the front and a 30 series in the rear if you have a low front bumper and a lowered car (with adjustable coilovers).

That way you won't have to lower the front as much (as you would with the 30 series tire) to achieve the same look.

Not lowering the front as much will prevent the front bumper from scraping on the ground.
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Old Oct 27, 2006 | 08:46 AM
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I currently Run a 35 in front and a 30 in rear.. no problems at all.
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Old Oct 27, 2006 | 08:50 AM
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Originally Posted by chimmike
tires don't get 'thicker', they either get wider or taller or both. Correct wording is key.
if you like to use taller instead of thicker thats fine. it doesn't change the fact that everyone else knew what he was talking about except for you.
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Old Oct 27, 2006 | 08:57 AM
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yeah you guys know what I'm talking about. So its for looks as well I see.
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Old Oct 27, 2006 | 09:13 AM
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Originally Posted by tsukaz
it doesn't change the fact that everyone else knew what he was talking about except for you.

oh really?

Originally Posted by davidv
You mean wider not thicker.

nice job checking to make sure you don't sound like an idiot before stating something
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Old Oct 27, 2006 | 09:15 AM
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Originally Posted by davidv
You mean wider not thicker.
No, he didn't.
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Old Oct 27, 2006 | 09:21 AM
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Originally Posted by mdracer76
I currently Run a 35 in front and a 30 in rear.. no problems at all.
Then you are doing better than these poor saps who had a taller diameter in the front than the back.

https://my350z.com/forum/wheels-and-tires/185233-245-35-19-slipping-issues-need-your-help.html
https://my350z.com/forum/2003-2009-nissan-350z/157436-slip-light-keep-fleshing-is-my-vds-broke.html
https://my350z.com/forum/wheels-and-tires/120497-slip-light-comes-on.html
https://my350z.com/forum/wheels-and-tires/61780-are-275-30-19s-the-proper-tire-for-19x9-5s.html
https://my350z.com/forum/wheels-and-tires/58463-slip-light-turns-on.html
https://my350z.com/forum/wheels-and-tires/47936-slipping.html
https://my350z.com/forum/wheels-and-tires/44187-slip-light.html
https://my350z.com/forum/wheels-and-tires/40291-slip-indicator-problem-after-switching-from-17in-to-19in.html
https://my350z.com/forum/maintenance-and-repair/36922-vdc-problems.html

Chris
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Old Oct 27, 2006 | 09:23 AM
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jesus christ...35 isn't always much thicker than 30!!!!!!!!!...it depends on how wide the tire is...the 245=width of the tire in mm...the 35=35% of 245mm..get it?!

(0.35)(245)=85.75
(0.30)(275)=82.5
Not a noticeable difference...245/30's would be too thin for normal driving, so in order to keep the wheel and tire diameters the same, you need to use a 35 series tire

Last edited by djnc; Oct 27, 2006 at 09:32 AM.
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Old Oct 27, 2006 | 09:30 AM
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Originally Posted by chimmike
nice job checking to make sure you don't sound like an idiot before stating something
Ok, so one other person didn't understand. does that make you feel less inadequate?
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Old Oct 27, 2006 | 10:49 AM
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so I guess its not recommended running a setup like that? I currently have 245/35/19 in the front and 275/35/19 in the rear. I suppose I should go with the same setup correct?
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