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I Need Tire Size Advice

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Old 09-23-2007, 09:54 AM
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ge2001
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Default I Need Tire Size Advice

I have 2001 C5 running stock sizes 245/45/17 & 275/40/18. I recently purchased a set of stock Z06 wheels 9.5" x 17" & 10.5" x 18" that I want to use to Track setup and I am thinking of purchasing the Falken Azenis in 275/40/17 and 295/40/18 but I am unsure if the 295/40/18 will work properly with the Active Handling feature. The 275/40/17 is 25.6 OD and the 295/40/18 is 27.2 OD. Looks like most people have gone with the 315/30/18 which is also 25.6 OD. Please let me know. Thanks.

Last edited by ge2001; 09-23-2007 at 04:38 PM.
Old 09-23-2007, 04:35 PM
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ge2001
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ttt
Old 09-23-2007, 09:30 PM
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UstaB-GS549
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You will probably find a lot of opinions about acceptable tire diameters. I have run equal diameter fronts and rears with no issues. I suspect that people that run odd combinations with bad results have loose electrical connectors or bad grounds.

I can't believe that the ABS can't accommodate minor diameter changes. What if you had bald rears and new fronts?
Old 09-23-2007, 09:34 PM
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ge2001
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Originally Posted by UstaB-GS549
You will probably find a lot of opinions about acceptable tire diameters. I have run equal diameter fronts and rears with no issues. I suspect that people that run odd combinations with bad results have loose electrical connectors or bad grounds.

I can't believe that the ABS can't accommodate minor diameter changes. What if you had bald rears and new fronts?
I agree with you but it would be nice to know if someone else had tried this combination. Thanks.
Old 09-23-2007, 09:50 PM
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robvuk
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I personally haven't tried that combo but there are a few guys here on this forum that have been having troubles with those diameters. They're getting engine drag warnings. What's wrong with stock Z sizes? Go for the 265/45 in front and you'll be fine.
Old 09-23-2007, 09:55 PM
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asp04
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I run 275's up front and 315's on rear. My traction control comes on all the time, I have to turn off. As for active handling, I don't believe it comes on any more than it is supposed to.
Old 09-23-2007, 09:55 PM
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gkmccready
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Originally Posted by UstaB-GS549
I can't believe that the ABS can't accommodate minor diameter changes. What if you had bald rears and new fronts?
ABS != AH.

FWIW, I'm running 295/30r18 + 305/35r18 on my C6... that's nearly 1.4in difference F:R.

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