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Share Your C3 Upgraded Wheel/Tire Combo's

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Old 01-21-2014, 11:56 AM   #41
TedH
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Originally Posted by MIKE80 View Post
The suspension I have is VBP Performance Plus full kit with VBP offset trailing arms, and VBP spreader bar. The wheels are aftermarket ( http://www.oewheelsllc.com/Wheels_3?...Q#.UtaryfY6JZk) C6 Z06 17"x9.5" black powdercoated with red outer banding, tires are Nitto NT555 Extreme Performance 25.55" tall 275/40 ZR17, and wheel adapters (http://www.ezaccessory.com/Billet_Wh...FTJp7AodqHIA-g) are 2.5". All sizes are the same front and rear. The ground to center wheel well lip height for the front is 26.5" and the rear is 27.5".
Looks and sounds SWEET!
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Old 01-21-2014, 04:45 PM   #42
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Looks and sounds SWEET!
Thanks!
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Old 01-21-2014, 09:34 PM   #43
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Here's my wheel/tire combo.

Replica C6 wheels in C5 size, black chrome finish.
Front: 17x8.5
Rear: 18x9.5
Tires: General G Max AS-O3
Front: 245/45R17
Rear: 275/40R18
Van Steel offset trailing arms
2.5" wheel adapters rear
2.75" wheel adapters front

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Needs to be lowered. Some forum members may not like the look, but I get many compliments on the wheel/tire combo.

Last edited by Oldguard 7; 01-21-2014 at 09:43 PM.
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Old 01-27-2014, 09:44 AM   #44
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My '81 with some 15 x 8 Weld Pro Stars and 245-60R15 Cooper Cobras.

Last edited by Street Rat; 01-27-2014 at 12:55 PM.
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Old 01-27-2014, 01:15 PM   #45
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Nothing says classic C3 like big sidewalls. Even without RWL or OWL.
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Old 01-28-2014, 09:01 AM   #46
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I had the white letters on the outside with my factory aluminum wheels. I thought I'd keep the black theme going. It makes the wheels stand out on this particular car.
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Old 01-28-2014, 10:42 PM   #47
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My '81 with some 15 x 8 Weld Pro Stars and 245-60R15 Cooper Cobras.
nice look
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Old 01-29-2014, 10:16 AM   #48
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Nothing says classic C3 like big sidewalls. Even without RWL or OWL.
Performance or not..... Very nice look!
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Old 01-29-2014, 10:53 AM   #49
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Thanks for the kind words guys.
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Old 01-29-2014, 05:47 PM   #50
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I have the 255-60-15's with approx 27.05" tire/wheel height.

From what I have found, my stock 15x8 wheels have:
5x4.75" bolt pattern
4" backspacing

Is this correct for bolt pattern and backspacing?

I've run the 17" tire sizes through a tire height calculator and the 255-50-17's align to my 255-60-15 tire height of 27". All of the three other sizes are close but are off:

245-45-17 has 25.7"
255-45-17 has 26" height
255-50-17 has 27" <========
245-55-17 has 27.6"
255-55-17 has 28"

Now, I want to know if American Racing 17x8 wheels require adapters or if they will fit without.

Would I just need to get 17x8 wheels with 5x4.75" pattern and 4" backspacing to fit with same dim's as my 15x8 wheels/tires? Adapters required?

I note the following wheels have the 5x4.75" pattern but 4.5" backspacing and are supposed to fit the C3 without modifications. They appear to be same SLP wheels others have installed:

SLP Performance ZR1 Series Chrome Wheels 81003


I am partial to the AR 105M's in Anthracite

I may go ahead and upgrade the wheels/tires this Summer...

ONLY IF I can find a decent domestic tire that fits. Right now, I've seen Hancook, Nitto, Kumho and BFGoodrich. What's with the poor selection of tires in this size? Gets me wondering if the 255-50-17's are going the way of my 255-60-15's...

Last edited by TedH; 01-29-2014 at 07:19 PM.
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Old 01-29-2014, 07:30 PM   #51
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I see 255-45-18's have greater availability and have the same 27" tire height.

Question: Is there an 18x8 wheel (like the 17x8) that works with the C3 without adapters?

Would I just get 18x8 wheels with 4.75" bolt pattern and 4.5" backspacing?
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Old 01-29-2014, 11:06 PM   #52
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Quote:
Originally Posted by TedH View Post
I see 255-45-18's have greater availability and have the same 27" tire height.

Question: Is there an 18x8 wheel (like the 17x8) that works with the C3 without adapters?

Would I just get 18x8 wheels with 4.75" bolt pattern and 4.5" backspacing?
Yes there is plenty of 18x8 wheels that will work without spacers/adapters. Like my Coys C5 18x8 with 4.00 back spacing, see pics in this thread.
There are other brands of wheels that offer 4.00 back spacing, Foose is the only one that I can think of off hand. You just have to shop around.

Now with 4.50 backspacing the wheels will have a tucked in look, some people like it some don't. I have seen 1980 - 1982 Corvettes on the forum with the same wheels with 4.50 back spacing and the wheels looked more tucked in on one car than on the other. That's why why I went with 4.00 back spacing. I just didn't want the gamble. The good news is there is no rubbing from what I have read here on the forum with 4.50 BS.

Yes you can get 18x8 with 5x4.75 bolt pattern and 4.00 or 4.5 BS. You should not have a problem.

Last edited by vetteman1981; 01-29-2014 at 11:18 PM.
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Old 01-30-2014, 01:36 PM   #53
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Yes there is plenty of 18x8 wheels that will work without spacers/adapters. Like my Coys C5 18x8 with 4.00 back spacing, see pics in this thread.
There are other brands of wheels that offer 4.00 back spacing, Foose is the only one that I can think of off hand. You just have to shop around.

Now with 4.50 backspacing the wheels will have a tucked in look, some people like it some don't. I have seen 1980 - 1982 Corvettes on the forum with the same wheels with 4.50 back spacing and the wheels looked more tucked in on one car than on the other. That's why why I went with 4.00 back spacing. I just didn't want the gamble. The good news is there is no rubbing from what I have read here on the forum with 4.50 BS.

Yes you can get 18x8 with 5x4.75 bolt pattern and 4.00 or 4.5 BS. You should not have a problem.
I need to take a look at some of the C3's on the forum with the 18x8 wheels with 4 & 4.5" backspacing. I'm leaning in that direction (255-45-18 tires and 18x8 wheels with 4-4.5" backspacing, 0 offset) as I could keep trans calibration/ride height of my C3.

Switching tires and wheels does seem to involve many more decisions than what brand of wheel/tire. True learning experience
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Old 01-30-2014, 01:49 PM   #54
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Thanks, I just got the wheels and tires two weeks ago.
Do you have 1-2 pics from back and front corners to see how the tires fit in the wheelwells (ie. sidewall in comparison to fender lip as well as maybe a pic showing clearance from t-arm/shock/brakeline bracket)?

I'm leaning toward that wheel and tire size (18x8 with zero offset and 4" backspacing with 255-45-18 tires) to get combo close to the outer dimensions of my 255-60-15's.
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Old 01-30-2014, 01:59 PM   #55
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Coy's polished C-5 18x8 with 4.00" back space
and Nitto 255/45/18 NT 555.
No mods to get these wheels and tires to fit.
The wheel width and back spacing is the same as stock.
Vette Brakes & Products powder coated calipers.
Vinylternative Decals for the front calipers.
Steel Braided Brake Hoses.

This thread helped me a lot.
http://forums.corvetteforum.com/c3-g...ly-thread.html
If I can find this fitment in a Torq Thrust M (anthracite) wheel, I may be moving up to 18's in 2014-2015.

I like the greater number of tire options in this size over the 255-50-17 tires. (both... 255-45-18 and 255-50-17 are 27" tall).
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Old 01-31-2014, 03:03 PM   #56
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Quote:
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Do you have 1-2 pics from back and front corners to see how the tires fit in the wheelwells (ie. sidewall in comparison to fender lip as well as maybe a pic showing clearance from t-arm/shock/brakeline bracket)?

I'm leaning toward that wheel and tire size (18x8 with zero offset and 4" backspacing with 255-45-18 tires) to get combo close to the outer dimensions of my 255-60-15's.
No I dont have any pics but I can get some for you either tonight or sometime this weekend.
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Old 01-31-2014, 03:10 PM   #57
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No I dont have any pics but I can get some for you either tonight or sometime this weekend.
Thanks. How does your C3 handle around town and on country roads?

Did you have to get an alignment when you upgraded to the new wheels/tires?
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Old 01-31-2014, 03:19 PM   #58
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Quote:
Originally Posted by TedH View Post
Do you have 1-2 pics from back and front corners to see how the tires fit in the wheelwells (ie. sidewall in comparison to fender lip as well as maybe a pic showing clearance from t-arm/shock/brakeline bracket)?

I'm leaning toward that wheel and tire size (18x8 with zero offset and 4" backspacing with 255-45-18 tires) to get combo close to the outer dimensions of my 255-60-15's.
From what I can find a 4inch back space is the same as -12mm offset for an 8 inch wide wheel.
Here is a chart that I found.

https://www.google.com/search?q=whee...iw=983&bih=548

Last edited by vetteman1981; 02-14-2014 at 02:47 PM.
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Old 01-31-2014, 03:29 PM   #59
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Quote:
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Thanks. How does your C3 handle around town and on country roads?

Did you have to get an alignment when you upgraded to the new wheels/tires?
I have only driven the car about 6 or 8 miles sence I put on the wheels on Jan 1 of this year and that was on a four lane Hwy. It did seam to have better stearing responce and firmer ride, not harsh at all.

I have not had it aligned yet will do so soon. I have heard that you should when you make the switch.
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Old 01-31-2014, 05:56 PM   #60
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I like this tire. All-season, good treadwear and a US tire company:

255/45/ZR18 XL103W 400AAA COOPER ZEON SPORT A/S TIRES

http://www.rims4less.com/proddetail....5fbd3471752bbb

I ran a set of Cooper "Discoverer H/T Plus" (20") on my 2003 Silverado for close to 45K miles. No issues and very good quality. Was nice that my my lady friend (at the time) got about 35% discount. I'll definitely buy Cooper products again. I have pair of their Mastercraft Avenger G/T's on back of my C3 currently. Zeon Looks like a quality tire.

Last edited by TedH; 01-31-2014 at 06:04 PM.
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