Wheel question
Thread Starter
Racer
Joined: Nov 2001
Posts: 440
Likes: 0
From: Pearland TX
Wheel question
Is it possible to run the 17x11 GS wheels on all 4 corners of a C-5? This is for track use only.
What is the difference between the Grand Sport and ZR1 wheels (I heard the offsets were different)?
Thanks
Will
What is the difference between the Grand Sport and ZR1 wheels (I heard the offsets were different)?
Thanks
Will
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 10
From: Montrose Colorado
Will, the ZR1 17x11" have a 36mm offset and I believe the GS 17X11" have a 56mm offset. I have seen ZR1's run the 17x11" wheels on all four corners with no issues, but I'm not sure about the C5 fitment. You might want to check with www.afswheels.com they can steer you in the right direction on the fitment. They sell ZR1, GS, and Z06 reproduction wheels. Hope this helps, 84 CF 91 ZR1
Last edited by vettl83; Aug 4, 2004 at 12:18 PM.
Le Mans Master
Joined: Jul 2004
Posts: 6,661
Likes: 1
I've seen guys at the track use the ZR1/GS wheels (if they are all the same size and offset) on their C5's with 335's in the rear. They stick out a bit in the rear, but that's fine for the track IMO. I wouldn't drive with that set up on the street though.
You know.. I think that I have a photo of a C5 Coupe with these wheels at Road America. Give me a few and I'll upload it.
X
You know.. I think that I have a photo of a C5 Coupe with these wheels at Road America. Give me a few and I'll upload it.
X
Le Mans Master
Joined: Jul 2004
Posts: 6,661
Likes: 1
Here they are. I left them unedited, so you could see how they fit on the car from the side and rear views.
These are the GS wheels, correct?
http://home.comcast.net/~xsiveone/RA1.JPG
http://home.comcast.net/~xsiveone/RA2.JPG
http://home.comcast.net/~xsiveone/RA3.JPG
Edit: They are too large to post as an image, so I linked them as a url.
Hope this helps.
X
These are the GS wheels, correct?
http://home.comcast.net/~xsiveone/RA1.JPG
http://home.comcast.net/~xsiveone/RA2.JPG
http://home.comcast.net/~xsiveone/RA3.JPG
Edit: They are too large to post as an image, so I linked them as a url.
Hope this helps.
X
Last edited by xsiveone; Aug 5, 2004 at 02:33 PM.
Thread Starter
Racer
Joined: Nov 2001
Posts: 440
Likes: 0
From: Pearland TX
Update
So this is what i have found out so far...
Even though allot of people use the GS and ZR1 labels interchangably they are very different. (even though they look identical)
all are 17"
ZR1 rims: fits 84-87 vette and ZR1's
Size, Offset
F:9.5, 38
R: 11, 36.5
Grand Sport: 88-96 vette
F:9.5, 56
R: 11, 50
Now from what i understand most people use the GS rim with 17x11's on all 4 corners of a C-5. They don't or barely stick out, the only caveate is that you can't turn full lock in front.
My next question is why hasn't anybody tried the ZR1 17x11 rims up front? It seems this would be a good trade off, stick out a bit ~1/2 inch and should not rub. Is something wrong with the scrub of the wheel not being centered or does it rub somewhere else?
?????
Will
Even though allot of people use the GS and ZR1 labels interchangably they are very different. (even though they look identical)
all are 17"
ZR1 rims: fits 84-87 vette and ZR1's
Size, Offset
F:9.5, 38
R: 11, 36.5
Grand Sport: 88-96 vette
F:9.5, 56
R: 11, 50
Now from what i understand most people use the GS rim with 17x11's on all 4 corners of a C-5. They don't or barely stick out, the only caveate is that you can't turn full lock in front.
My next question is why hasn't anybody tried the ZR1 17x11 rims up front? It seems this would be a good trade off, stick out a bit ~1/2 inch and should not rub. Is something wrong with the scrub of the wheel not being centered or does it rub somewhere else?
?????
Will
Thread Starter
Racer
Joined: Nov 2001
Posts: 440
Likes: 0
From: Pearland TX
X,
Judging by how much those stick out and the color combo i would suggest the rears are ZR1's (17x11, 36.5mm offset) and the fronts are also ZR1's (17x9.5, 38mm offset). I say this b/c they look identical to the combo sold on ebay and labeled properly as ZR1's.
I have seen some GS rims and they are flush with the rear fender.
More ?????'s
Will
Judging by how much those stick out and the color combo i would suggest the rears are ZR1's (17x11, 36.5mm offset) and the fronts are also ZR1's (17x9.5, 38mm offset). I say this b/c they look identical to the combo sold on ebay and labeled properly as ZR1's.
I have seen some GS rims and they are flush with the rear fender.
More ?????'s
Will
Le Mans Master
Joined: Jul 2004
Posts: 6,661
Likes: 1
I thought that they were both the same. These wheels looked like the GS wheels to me because they are black. I have no idea how wide they are, but I do know that he had 335's on the rear.
This set up would be fine for the track IMO, but not for the street. In addition to most likely chipping up your paint, it just doesn't look good to me.
Sorry that I couldn't be of more help.
Edit: I just looked at the first photo again with the closeup of the rear wheel. Look at the rear rotor at about 9 o'clock. Check out the crack in the rotor.
I think that this was taken early Sunday, so I wonder how many more times he ran on these rotors.
X
This set up would be fine for the track IMO, but not for the street. In addition to most likely chipping up your paint, it just doesn't look good to me.
Sorry that I couldn't be of more help.
Edit: I just looked at the first photo again with the closeup of the rear wheel. Look at the rear rotor at about 9 o'clock. Check out the crack in the rotor.
I think that this was taken early Sunday, so I wonder how many more times he ran on these rotors.X
Last edited by xsiveone; Aug 5, 2004 at 05:10 PM.
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Verdad Gallardo
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Edit: I just looked at the first photo again with the closeup of the rear wheel. Look at the rear rotor at about 9 o'clock. Check out the crack in the rotor. I think that this was taken early Sunday, so I wonder how many more times he ran on these rotors.
Originally Posted by froggy47
I think that's a drilled & slotted rotor. Not my choice for track use but that's just me. 
Can we say Rabestos Rotors from Rockauto or NAPA??I think this also shows the importance of looking at your brake rotors between each run durnig take days.
Tom
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,822
From: Charlotte, NC (formerly Endicott, NY)
The GS rims are not flush in the rear of a C5. They stick out about a half inch compared to the stock tires. The ZR1 rims stick out about an inch total.
Bill
Bill
Le Mans Master
Joined: Jul 2004
Posts: 6,661
Likes: 1
I think this also shows the importance of looking at your brake rotors between each run durnig take days.
I would never use cross drilled rotors for the track. Rotors crack bad enough without cross drilling.
On topic: Aren't these the GS wheels? Why would someone buy a set of ZR1 wheels for track use and then paint them black and leave a polished lip like the GS wheel? I wouldn't bother if they were just track wheels.
X
