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Anything wrong with running 315/30/18 at all four corners?

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Old 03-16-2014, 09:58 PM
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Chris Edwards
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Default Anything wrong with running 315/30/18 at all four corners?

I want to run 315/30/18 NT01's at all 4 corners so I can drive to the track and back. I wish they made a 335/30/18 then I would run those in the back... Any issues with running a square setup with these tires on all four corners or will it cause an understeer setup? I do have the Johnny O'Connell swaybars that have adjustment, but I figured I'd ask here first...
Old 03-16-2014, 10:14 PM
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Hat_Trick_Hokie
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Actually everything else bring equal: my guess is that a wider rear tire in the back would actually add understeer on the same car rather than a 'square' setup.

I have run 315/17 square for a few years with good results. Just came back from my first event on 305/18 square and have no complaints. There are many other users on here that use a square setup, and I think you'll be fine.

Last edited by Hat_Trick_Hokie; 03-16-2014 at 10:30 PM.
Old 03-16-2014, 10:23 PM
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RDnomorecobra
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works great, actually makes the car more neutral by taking out some of the stock understeer. that's my experience, anyway.
Old 03-17-2014, 01:31 AM
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crimlwC6
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I've got the same bars and I've had no problems with 315 nt01s.
Old 03-17-2014, 02:44 AM
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hellrazr
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Originally Posted by RDnomorecobra
works great, actually makes the car more neutral by taking out some of the stock understeer. that's my experience, anyway.
I ran 17 with 275s all the way around, and my experience was similar.

Just be sure to warn a fellow corvette driver or instructor about the change if they drive your car setup like that. Although, it's funny to let them find out themselves...it's a good test to see if they have car control I've had some of the best belly laughs doing that.
Old 03-17-2014, 08:38 AM
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1BDRSK
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Originally Posted by lxcoupe
I want to run 315/30/18 NT01's at all 4 corners so I can drive to the track and back. I wish they made a 335/30/18 then I would run those in the back... Any issues with running a square setup with these tires on all four corners or will it cause an understeer setup? I do have the Johnny O'Connell swaybars that have adjustment, but I figured I'd ask here first...
Just ordered 4 of those tires last night based on several members here running them with zero issues.
Old 03-17-2014, 12:35 PM
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JeremyGSU
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Are those that are running 315's running a front aftermarket brake duct kit? I don't see how they would fit if you did.

I'm running 285's on the front at the track and they will rub in the inside ducting if I turn the wheel too much on my Doug Rippie kit.
Old 03-19-2014, 09:09 AM
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waddisme
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I run the 305s and they grooved my DRM ducts. Can't imagine going any wider on the front.
Old 03-19-2014, 09:32 AM
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crimlwC6
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I quit running my quantum brake kit from my c6 that I put on the c5 because of rub.
Old 03-19-2014, 09:59 AM
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Hat_Trick_Hokie
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Originally Posted by waddisme
I run the 305s and they grooved my DRM ducts. Can't imagine going any wider on the front.
Lovely. I have DRM ducts in the garage waiting to be installed
Old 03-19-2014, 10:39 AM
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FuriousDonuts
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I run 315s on 18x11 front wheels and use the DRM ducts. They only rub on full lock (or just shy thereof). I have a bit of grooving from hard turns in the paddock, but nothing that has compromised the wheel or duct.
Old 03-19-2014, 11:05 AM
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ZedO6
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I run 285/35's on 10.5 X 18 Speedlines and they will absolutely rub my DRM brake ducts on full lock or anything close to full lock.

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