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probably a rare tire question....

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Old Feb 8, 2007 | 12:55 AM
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Default probably a rare tire question....

I am trying to put together a budget set of winter wheels and tires. I have a set of stock wagon wheels on the way along with 2 245/45/17 tires. the fronts i have taken care of.

My question is, what is the narrowest tire i can mount on the rear 18x9.5 wheels? I can get a set of 245/45/18 for a reasonable price. Will they mount? I know they will look a little weird, I just need them to get through this winter.

Thank you.
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Old Feb 8, 2007 | 11:50 AM
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I wouldn't put them on there. You may end up having problems with the active handling/traction control. I'd recommend sticking with the stock size for the rear and you can probably find a set cheap on the for sale section of the forum. To see if they will properly fit on a 9.5" wide wheel, check out the specs on the Tire Rack web site.
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Old Feb 8, 2007 | 01:02 PM
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Originally Posted by JDs00PewterCoupe
I wouldn't put them on there. You may end up having problems with the active handling/traction control. I'd recommend sticking with the stock size for the rear and you can probably find a set cheap on the for sale section of the forum. To see if they will properly fit on a 9.5" wide wheel, check out the specs on the Tire Rack web site.
Why would he have AH/TC problems? The back tires are clearly bigger than the fronts.... As to whether a 245/45-18 will fit a 9.5" wide wheel, yes he will need to check the mfr's specs. You make the assumption that his contemplated tires are available from the TR; if they are, TR will have the tire specs. Otherwise he'll need to track down this info elsewhere - most typically from the mfr.
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Old Feb 8, 2007 | 04:50 PM
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Originally Posted by wamara
Why would he have AH/TC problems? The back tires are clearly bigger than the fronts.... As to whether a 245/45-18 will fit a 9.5" wide wheel, yes he will need to check the mfr's specs. You make the assumption that his contemplated tires are available from the TR; if they are, TR will have the tire specs. Otherwise he'll need to track down this info elsewhere - most typically from the mfr.
I have compared the size of these tires with the stock size and they are pretty close to the same height so T/C shouldn't be an issue. Yes, they are narrower, but that would be better in the snow anyway. I was more curious if they wouyld fit on the stock 9.5 rim.
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Old Feb 8, 2007 | 05:15 PM
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Originally Posted by wamara
Why would he have AH/TC problems?
I switched to 385/30/18 rears and at speeds over 40 my traction contol kicks in and starts applying the brakes. The car detects the rears spnning more than the fronts and tries to compensate. Very scary when you are not expecting it as the car has pretty decent brakes. Any time I drive now I have to turn traction control off.
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Old Feb 8, 2007 | 06:04 PM
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Originally Posted by vetterlatethannever
I switched to 385/30/18 rears and at speeds over 40 my traction contol kicks in and starts applying the brakes.
Dude, that's because your rear tires are a full inch shorter than the fronts (if you still have 245/45's on the front). That must not even look right.
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Old Feb 9, 2007 | 12:04 AM
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Originally Posted by vetterlatethannever
I switched to 385/30/18 rears and at speeds over 40 my traction contol kicks in and starts applying the brakes. The car detects the rears spnning more than the fronts and tries to compensate. Very scary when you are not expecting it as the car has pretty decent brakes. Any time I drive now I have to turn traction control off.
Well, I don't know what you have - I've never heard of a 385/30-18 tire.... I'm conversant with the AH problems caused by incorrect tire sizing, and as I earlier noted, his contemplated 245/45-18 rear tire is circumferentially bigger than his 245/45-17 front tire, ergo he should not have a problem, which I was pointing out to the person whose post proceeded mine

AMRAAM, I will repeat what I told you earlier. The tire mfr in its specifications data will tell you if its 245/45-18 tire will fit a 9.5" wide rim or not. Since you haven't told us what brand and model of tire you are considering, no one here can legitimately advise you further.
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Old Feb 9, 2007 | 07:03 AM
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Originally Posted by wamara
Well, I don't know what you have - I've never heard of a 385/30-18 tire.... I'm conversant with the AH problems caused by incorrect tire sizing, and as I earlier noted, his contemplated 245/45-18 rear tire is circumferentially bigger than his 245/45-17 front tire, ergo he should not have a problem, which I was pointing out to the person whose post proceeded mine

AMRAAM, I will repeat what I told you earlier. The tire mfr in its specifications data will tell you if its 245/45-18 tire will fit a 9.5" wide rim or not. Since you haven't told us what brand and model of tire you are considering, no one here can legitimately advise you further.
I thought size wsa the only thing that mattered. Sorry about that. I was looking at Michelin Pilots. But not sure they would be that great for snow anyway.
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Old Feb 9, 2007 | 10:49 AM
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Originally Posted by vetterlatethannever
I switched to 385/30/18 rears and at speeds over 40 my traction contol kicks in and starts applying the brakes. The car detects the rears spnning more than the fronts and tries to compensate. Very scary when you are not expecting it as the car has pretty decent brakes. Any time I drive now I have to turn traction control off.
Do you mean 285/30/18???
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Old Feb 9, 2007 | 10:51 AM
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Originally Posted by wamara
Well, I don't know what you have - I've never heard of a 385/30-18 tire....
I assumed he meant 285/30/18...(?)
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Old Feb 9, 2007 | 12:33 PM
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Originally Posted by AMRAAM
I thought size wsa the only thing that mattered. Sorry about that. I was looking at Michelin Pilots. But not sure they would be that great for snow anyway.
In a broad sense you are correct, but when you begin to approach the two ends of the spectrum insofar as sizing and application are concerned (which IMO you are in contemplating a 245 tire on a 9.5" wide wheel), different mfrs. may have different specs. And for which Pilots? There are at least a half dozen different Pilots models.
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Old Feb 9, 2007 | 03:15 PM
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Originally Posted by wamara
In a broad sense you are correct, but when you begin to approach the two ends of the spectrum insofar as sizing and application are concerned (which IMO you are in contemplating a 245 tire on a 9.5" wide wheel), different mfrs. may have different specs. And for which Pilots? There are at least a half dozen different Pilots models.
Ahhh...that makes sense. It is probably on the very narrow end of the scale. I honestly don;t know what pilots. I'll find out.

Thanks for all your help so far.
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