Tire diameter & active handling
Thread Starter
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
Tire diameter & active handling
Posted this on the Z06 forum and got plenty of views with no technical advice...
How many of you are running a combo of 265/40-17 front with a 315/30-18 on the rear of your C5Z? What make/model tire is it? Have you had issues with your active handling?
I'm looking to replace my F1SC's with some PS2's, and I've been told to go with the above sized combo. Michelin only shows a 0.02" difference in diameter between front and rear, but I've read that the proper delta between front and rear should be 0.05"+ to avoid AH issues.
Comments please...
How many of you are running a combo of 265/40-17 front with a 315/30-18 on the rear of your C5Z? What make/model tire is it? Have you had issues with your active handling?
I'm looking to replace my F1SC's with some PS2's, and I've been told to go with the above sized combo. Michelin only shows a 0.02" difference in diameter between front and rear, but I've read that the proper delta between front and rear should be 0.05"+ to avoid AH issues.
Comments please...
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
Posted this on the Z06 forum and got plenty of views with no technical advice...
How many of you are running a combo of 265/40-17 front with a 315/30-18 on the rear of your C5Z? What make/model tire is it? Have you had issues with your active handling?
I'm looking to replace my F1SC's with some PS2's, and I've been told to go with the above sized combo. Michelin only shows a 0.02" difference in diameter between front and rear, but I've read that the proper delta between front and rear should be 0.05"+ to avoid AH issues.
Comments please...
How many of you are running a combo of 265/40-17 front with a 315/30-18 on the rear of your C5Z? What make/model tire is it? Have you had issues with your active handling?
I'm looking to replace my F1SC's with some PS2's, and I've been told to go with the above sized combo. Michelin only shows a 0.02" difference in diameter between front and rear, but I've read that the proper delta between front and rear should be 0.05"+ to avoid AH issues.
Comments please...
Any particular reason you want to go to the wider tire? It may not benefit you all that much depending on what you are trying to do. If you are using OEM C5Z wheels the rear wheel is a half inch smaller than what is recommended by Michelin for that width tire. That will bow the tire out some.
Bill
Safety Car
Joined: Jul 2004
Posts: 3,904
Likes: 29
From: Vancouver Washington
If you go with 275/40/17s and 305/35/18s they'll fit your wheels better and you can still maintain the .5" delta that TC is supposed to need.
It also makes the care turn in cleaner and reduces the understeer.
It also makes the care turn in cleaner and reduces the understeer.
Thread Starter
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
Thread Starter
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
I would run that combo no problem if they made PS2's in a 305/35...
Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
I run Nitto NT-01's in sizes 255/40/17 and 315/30/18 and never get any AH warnings, codes or anything driving very hard in the twisties. I always drive with TC off but AH doesnt seem to care about the diameter difference in my sizes nor does the ABS.
I wish Nitto would have made a 315/35/18 though...
I wish Nitto would have made a 315/35/18 though...
Last edited by Z06supercharged; Sep 18, 2009 at 03:26 AM.
Thread Starter
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
I run Nitto NT-01's in sizes 255/40/17 and 315/30/18 and never get any AH warnings, codes or anything driving very hard in the twisties. I always drive with TC off but AH doesnt seem to care about the diameter difference in my sizes nor does the ABS.
I wish Nitto would have made a 315/35/18 though...
I wish Nitto would have made a 315/35/18 though...
Drifting
Joined: Sep 2008
Posts: 1,389
Likes: 3
From: somewhere shooting my assault rifles
Yes I actually went down to a 255/40-17 on the fronts because a 265 wasnt available and I did not like the taller 275 tire as it was visually unappealing to me compared to the rear sidewall height of the 315/30-18 (very very noticeable visual difference running a 275/40 vs 315/30 in sidewall heights and it looks stupid in my opinion and handling im still hammering backroads just the same as I always did).
Last edited by Z06supercharged; Sep 19, 2009 at 11:35 AM.
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