Backspacing
Thread Starter
Burning Brakes
Joined: Apr 2006
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From: Brooklyn New York
Backspacing
I need some help. I got a good deal on a set of CCW's. 19 x 9 & 19 x 11
I need to check the backspacing. What back spacing do I need to fit on my '01 Z. The guy doesnt know what kind of car they came off! Thanks.
I need to check the backspacing. What back spacing do I need to fit on my '01 Z. The guy doesnt know what kind of car they came off! Thanks.
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Joined: Oct 2002
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From: Gone
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St. Jude Donor '03
For those wheel widths, you'd want to see a backspace of about 7" on the front wheels, and 8.5" on the rears.
Also, I'm unaware that CCW even makes a 9" wide wheel. 8.5", yes, 10", yes.
Double-check the overall width of the wheels. If the fronts measure 10" wide (outside edge to outside edge) then they are 9" wheels. If the rears measure 12", then they are 11" wheels (Overall width measures one inch more than stated width).
Also, I'm unaware that CCW even makes a 9" wide wheel. 8.5", yes, 10", yes.
Double-check the overall width of the wheels. If the fronts measure 10" wide (outside edge to outside edge) then they are 9" wheels. If the rears measure 12", then they are 11" wheels (Overall width measures one inch more than stated width).
Last edited by Y2Kvert4me; Mar 25, 2009 at 03:27 PM.
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Offset is the distance the wheel mounting flange is located from the center line of the wheel. Depending on wheel width the offset requirements to fit on a car can vary.
Do you know if the wheels will even bolt to the car? If you do not know what car they were mounted on before they may not even bolt onto a C5. Bolt circle, hub fit, etc. That would be the first thing I would check.
Bill
Do you know if the wheels will even bolt to the car? If you do not know what car they were mounted on before they may not even bolt onto a C5. Bolt circle, hub fit, etc. That would be the first thing I would check.
Bill
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 787
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From: Brooklyn New York
Thanks for your help. The guy that has them dont know how to measure them so I gotta go there & do it myself. He gave me close measurements & its close so I'll take a ride & check them myself!
Race Director
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St. Jude Donor '03
You will definitely need to tub it if you want them to fit flush with stock fenders.
For a 12" wide wheel and mini-tub, I would suggest an offset of 74-76mm.
For a 12" wide wheel and mini-tub, I would suggest an offset of 74-76mm.
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 787
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From: Brooklyn New York
OK, so here's the deal. The guy didnt know anything about them or how to measure them. They are Iforged Precision series Daytona's.
20"x10" with a 7.75" backspace about 60mm offset.
20"x8.5 with a 6.25" backspace about 50mm offset.
5x4.5 bolt circle
I know they wont work on my Vette but I had to buy them anyway.
Got them for $500!!!
I'll put them on E-bay & make some $$$$$
20"x10" with a 7.75" backspace about 60mm offset.
20"x8.5 with a 6.25" backspace about 50mm offset.
5x4.5 bolt circle
I know they wont work on my Vette but I had to buy them anyway.
Got them for $500!!!
I'll put them on E-bay & make some $$$$$
Last edited by SpeedyGjr; Mar 25, 2009 at 10:12 PM.
Race Director
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St. Jude Donor '03
How did you measure the dia?
If you measured them overall, you have 19" wheels.
I know this because Iforged doesn't make the TE Monoblocs in 20".
http://iforged.com/us/wheels_detail.php?WhID=56
If you measured them overall, you have 19" wheels.
I know this because Iforged doesn't make the TE Monoblocs in 20".
http://iforged.com/us/wheels_detail.php?WhID=56
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Race Director
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St. Jude Donor '03
How do you confuse a 1pc wheel with 3pc wheel? 
Post some pictures before you try selling them, so someone can positively ID what you have.
Or you're just just gonna **** off whoever gets stuck with the "I think they are..." wheels next.
Post some pictures before you try selling them, so someone can positively ID what you have.
Or you're just just gonna **** off whoever gets stuck with the "I think they are..." wheels next.
Thread Starter
Burning Brakes
Joined: Apr 2006
Posts: 787
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From: Brooklyn New York
No, i got it down now. He told me they were Monobloc. I just picked them up.
Heres his ad. http://newyork.craigslist.org/que/pts/1089086788.html
Heres his ad. http://newyork.craigslist.org/que/pts/1089086788.html
Last edited by SpeedyGjr; Mar 25, 2009 at 10:43 PM.