Tire size
Team Owner
Joined: May 1999
Posts: 22,830
Likes: 13
From: Columbus Ohio
CI 3-4, 8-9-10 Veteran
St. Jude Donor '06-'08-'10
What Y2Kvert4me is saying is that you need the rear tires to be @ 1/2" larger in diameter than the fronts. 
If they aren't you can have problems with the traction control.
Use this site to plug in front and rear sizes to make sure you maintain at least 1/2" difference in diameter.
http://www.rims-n-tires.com/rt_specs.jsp
If they aren't you can have problems with the traction control.
Use this site to plug in front and rear sizes to make sure you maintain at least 1/2" difference in diameter.
http://www.rims-n-tires.com/rt_specs.jsp
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
knee jerk reaction they are 18 vs 17 after all just clarifying that the tire is not actually taller alone with out the rim that is all =) "profile speaking"
Last edited by Got uid0; Mar 24, 2009 at 11:01 PM.
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
he knows what he is talkin about
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
Which one of the numbers is the tire height. If it is the middle ones then it is the same as a stock zo6 tire. The 265 and 285 is the width. And the other is the rim.
I don't see where the problem is.
I ordered 265-40-17 front and 285-35-18 rear. The stock zo6 size 265-40-17 front and 295-35-18 in the rear. They are the same as stock z06 size except the rear will be 3/4 of inch narrower.
Where is the problem.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
I don't see where the problem is.
I ordered 265-40-17 front and 285-35-18 rear. The stock zo6 size 265-40-17 front and 295-35-18 in the rear. They are the same as stock z06 size except the rear will be 3/4 of inch narrower.
Where is the problem.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
Last edited by 540 vette; Mar 25, 2009 at 04:47 AM.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Which one of the numbers is the tire height. If it is the middle ones then it is the same as a stock zo6 tire. The 265 and 285 is the width. And the other is the rim.
I don't see where the problem is.
I ordered 265-40-17 front and 285-35-18 rear. The stock zo6 size 265-40-17 front and 295-35-18 in the rear. They are the same as stock z06 size except the rear will be 3/4 of inch narrower.
Where is the problem.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
I don't see where the problem is.
I ordered 265-40-17 front and 285-35-18 rear. The stock zo6 size 265-40-17 front and 295-35-18 in the rear. They are the same as stock z06 size except the rear will be 3/4 of inch narrower.
Where is the problem.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
But here's what you need to remember...the aspect ratio is expressed as a percentage of the tires width. ie, 265/40/17....the thickness of the sidewall will be 40% of the 265mm width.
So, comparing a 255/40/17, and a 275/40/17...the 275 is not only wider, but is also a taller tire, even though they are both 40 series tires. 40% of 275 is more sidewall than 40% of 255.
Using actual heights for the 3 tires I mentioned, you can see how much difference it makes:
255/40/17 = 25.0" tall
265/40/17 = 25.3" tall
275/40/17 = 25.7" tall
And the rear 285/35/18 will be 25.9" tall.
You'll be fine with the 265/285 combo...but as you can see, the 275 would be too close in height to the 285 rear, and has potential to cause some problems with unwanted traction control engagement.
Team Owner
Joined: May 1999
Posts: 22,830
Likes: 13
From: Columbus Ohio
CI 3-4, 8-9-10 Veteran
St. Jude Donor '06-'08-'10
I ordered 265-40-17 front and 285-35-18 rear. The stock zo6 size 265-40-17 front and 295-35-18 in the rear. They are the same as stock z06 size except the rear will be 3/4 of inch narrower.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
Also is this rear tire going to fit in my rear wheel well. And is the front going to fit.
I also have stock Z06 wheels and run 275/40x17 and 295/35x18. That combo has .4" difference. They fit with no problem.
