CCW SPT10 Wheels
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CCW SPT10 Wheels
I have a 2003 Anniversary Red convertible (non Z06), manual transmission.
Brakes and rotors are all stock.
I have decided to upgrade the wheels to CCW SPT10, 18” in the front, 19” in the rear.
However, I’m not sure about the proper width, backspace, offset & tire size, as I am getting conflicting information.
I’m looking for fitment to be perfect (i.e. flush with front & rear factory fender/quarters).
Anybody have his set up and can help?
Thanks!
Brakes and rotors are all stock.
I have decided to upgrade the wheels to CCW SPT10, 18” in the front, 19” in the rear.
However, I’m not sure about the proper width, backspace, offset & tire size, as I am getting conflicting information.
I’m looking for fitment to be perfect (i.e. flush with front & rear factory fender/quarters).
Anybody have his set up and can help?
Thanks!
Le Mans Master
Joined: Jul 2007
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From: Oswego IL
CCW has been fitting C5s with wheels for 20 years. They have all the fitment information on file. They will get you set up easily. No conflicting information when you let the manufacturer get you taken care of.
Also, search for the huge "CCW wheel pics" thread. Lots of info in there.
The "sticky" at the top of the page with wheel and tire sizing is very helpful as well. That is why we made it.
Also, search for the huge "CCW wheel pics" thread. Lots of info in there.
The "sticky" at the top of the page with wheel and tire sizing is very helpful as well. That is why we made it.
Last edited by FYRARMS; May 23, 2020 at 10:56 PM.
Thread Starter
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Well, I did contact CCW and got measurements that were total different from what I was seeing from researching this forum, hence the reason for my question.
I just was not comfortable with what they were stating/recommending and they told me to contact my preferred wheel company for proper measurement & fitment.
I even contacted them twice and they gave me 2 different fitments, so confidence level in them is low.
This isn’t John’s company anymore.😀
I just was not comfortable with what they were stating/recommending and they told me to contact my preferred wheel company for proper measurement & fitment.
I even contacted them twice and they gave me 2 different fitments, so confidence level in them is low.
This isn’t John’s company anymore.😀
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From what I could tell and wanting to make sure that fitment is perfect (i.e. wheel/tire combo flush with front & rear factory fender/quarters), I think I can go 18x9.5” in front and 19x11” for the rears. Backspace, offset & tire size I’m not sure about and was looking for clarification on these numbers.
My last contact with them, they stated 18x10” (7.75” backspacing, 275/35-18 tire size) for the fronts and 19x11.5” (8.65” backspacing, 305/30-19 tire size) for the rears, both of which would have a 2” lip. However they were pretty clear they could not guarantee perfect fitment with this setup (wheel and tire size) and stressed to go to the “nearest wheel dealer to get measured up for proper fitment” for both wheel and tire size.
I guess I was surprised with that last statement as CCW seems to have sold a few wheels to Corvette owners, especially on this forum, so I thought they would know for sure, hence my confusion.
Any help greatly appreciated!
My last contact with them, they stated 18x10” (7.75” backspacing, 275/35-18 tire size) for the fronts and 19x11.5” (8.65” backspacing, 305/30-19 tire size) for the rears, both of which would have a 2” lip. However they were pretty clear they could not guarantee perfect fitment with this setup (wheel and tire size) and stressed to go to the “nearest wheel dealer to get measured up for proper fitment” for both wheel and tire size.
I guess I was surprised with that last statement as CCW seems to have sold a few wheels to Corvette owners, especially on this forum, so I thought they would know for sure, hence my confusion.
Any help greatly appreciated!
Race Director
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C5 of Year Finalist (appearance mods) 2019
Le Mans Master
Joined: Jul 2007
Posts: 6,094
Likes: 3,468
From: Oswego IL
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Race Director
Joined: Jan 2000
Posts: 10,379
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From: Central TX
C5 of Year Finalist (appearance mods) 2019
From what I could tell and wanting to make sure that fitment is perfect (i.e. wheel/tire combo flush with front & rear factory fender/quarters), I think I can go 18x9.5” in front and 19x11” for the rears. Backspace, offset & tire size I’m not sure about and was looking for clarification on these numbers.
My last contact with them, they stated 18x10” (7.75” backspacing, 275/35-18 tire size) for the fronts and 19x11.5” (8.65” backspacing, 305/30-19 tire size) for the rears, both of which would have a 2” lip. However they were pretty clear they could not guarantee perfect fitment with this setup (wheel and tire size) and stressed to go to the “nearest wheel dealer to get measured up for proper fitment” for both wheel and tire size.
I guess I was surprised with that last statement as CCW seems to have sold a few wheels to Corvette owners, especially on this forum, so I thought they would know for sure, hence my confusion.
Any help greatly appreciated!
My last contact with them, they stated 18x10” (7.75” backspacing, 275/35-18 tire size) for the fronts and 19x11.5” (8.65” backspacing, 305/30-19 tire size) for the rears, both of which would have a 2” lip. However they were pretty clear they could not guarantee perfect fitment with this setup (wheel and tire size) and stressed to go to the “nearest wheel dealer to get measured up for proper fitment” for both wheel and tire size.
I guess I was surprised with that last statement as CCW seems to have sold a few wheels to Corvette owners, especially on this forum, so I thought they would know for sure, hence my confusion.
Any help greatly appreciated!
For a C5 fitment, here are some of your options. Note, the above specs are for CCW's SP-series wheel line-up.
On the front, they did offer an 18x9.5 with +56 offset (7.45" backspace) and 2" lip. If you want to fit C6 Z06-size calipers, they offer an 18x9.5 with +48 offset (7.15" backspace) and 1" lip. My SP500 fronts are that latter spec.
As for their 18x10 fronts, their standard spec for those is a +57 offset (7.75" backspace) and 2" lip. No 10" width front, with 2" lip, will clear C6Z calipers and they don't offer a 10" front, with 1" lip.
On the rear, you basically have two options in 19's, either a 19x11 with +54 offset (8.150 backspace) and 3" lip or a 19x11.5 with +65 offset (8.65" backspace) and 2" lip. The 19x11 rear with +54 offset is the same spec rear wheel that's been on my car, for 15yrs. It is CCW's standard 19" rear fitment for C5's and fits very well. The 19x11.5 is an uncommon size and considered max-width for a C5 with oem rear fenders. CCW doesn't make many of them and I can probably understand why they were hesitant to recommend it.
Hopefully, this will clear up some confusion.
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USAZR1,
So for a 2003 C5, non Z06 with stock brakes front & rear for CCW's SP-series wheels (of which I believe the CCW SPT10 are part of that series?), I can safely go:
Front setup: 18x9.5 with +56 offset (7.45" backspace) and 2" lip;
Rear setup: 19x11 with +54 offset (8.150 backspace) and 3" lip.
If the above is correct, what would be the general tire size?
Thank you!
So for a 2003 C5, non Z06 with stock brakes front & rear for CCW's SP-series wheels (of which I believe the CCW SPT10 are part of that series?), I can safely go:
Front setup: 18x9.5 with +56 offset (7.45" backspace) and 2" lip;
Rear setup: 19x11 with +54 offset (8.150 backspace) and 3" lip.
If the above is correct, what would be the general tire size?
Thank you!
Race Director
Joined: Jan 2000
Posts: 10,379
Likes: 3,387
From: Central TX
C5 of Year Finalist (appearance mods) 2019
USAZR1,
So for a 2003 C5, non Z06 with stock brakes front & rear for CCW's SP-series wheels (of which I believe the CCW SPT10 are part of that series?), I can safely go:
Front setup: 18x9.5 with +56 offset (7.45" backspace) and 2" lip;
Rear setup: 19x11 with +54 offset (8.150 backspace) and 3" lip.
If the above is correct, what would be the general tire size?
Thank you!
So for a 2003 C5, non Z06 with stock brakes front & rear for CCW's SP-series wheels (of which I believe the CCW SPT10 are part of that series?), I can safely go:
Front setup: 18x9.5 with +56 offset (7.45" backspace) and 2" lip;
Rear setup: 19x11 with +54 offset (8.150 backspace) and 3" lip.
If the above is correct, what would be the general tire size?
Thank you!
Yes, those widths and offsets will work fine.
For tires, I have 265/35/18 Hankooks (25.3" tall) on the front and before going widebody, 305/30/19 Hankooks (26.3" tall) on the rear.
Another front tire option is a 275/35/18 @ 25.6" tall.