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18x8 4.5" bs on front?

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Old 02-21-2017, 12:36 PM
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Kacyc3
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Default 18x8 4.5" bs on front?

Is anyone running this combination without spacers and with 27" tall tires?
Old 02-21-2017, 04:25 PM
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roscobbc
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Originally Posted by Kacyc3
Is anyone running this combination without spacers and with 27" tall tires?
I'm running 18 x 8"s with 255/45/18's with 4" backspace. Whilst OD is same as stock for year (1968) - with the low profile tyres the outer 'corners' of the tyres can rub on frame and/or fender opening depending on car. 4.5" may be marginal.
Old 02-21-2017, 06:04 PM
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Zoix
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Default 18 x 8 with 4.5" bs

255/45 rubber no issues.


Old 02-21-2017, 10:16 PM
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3JsVette
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Originally Posted by Zoix
255/45 rubber no issues.
There's your answer. Just keep in mind as old as these cars are and for what they have been through there can be slight differences.
Old 02-21-2017, 11:51 PM
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Kacyc3
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Originally Posted by 3JsVette
There's your answer. Just keep in mind as old as these cars are and for what they have been through there can be slight differences.
I was hoping someone with a late 70s car would chime in as I'm not sure if there is any difference between the the early and late C3s wheels wells.
Old 02-22-2017, 12:25 AM
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AboveTheLogic
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Originally Posted by Kacyc3
I was hoping someone with a late 70s car would chime in as I'm not sure if there is any difference between the the early and late C3s wheels wells.
'79 C3. Don't know what the conversion is for the specs below but these wheels fit great with no spacers.

Product Information: 4 (77241) Vision
18 X8.5 5-120.65 -6 DGMTML
Torque

4 (26961) Continental
255 /45 R18 103Y XL BSW
ExtremeContact DW

Attachment 48359585
Old 02-22-2017, 01:07 PM
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Kacyc3
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Originally Posted by AboveTheLogic
'79 C3. Don't know what the conversion is for the specs below but these wheels fit great with no spacers.

Product Information: 4 (77241) Vision
18 X8.5 5-120.65 -6 DGMTML
Torque

4 (26961) Continental
255 /45 R18 103Y XL BSW
ExtremeContact DW


what is DGMTML?
Old 02-22-2017, 02:56 PM
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terrys6t8roadster
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Standard wheel width on C-3s is 8" with approximately 4" back spacing [except 68]. 18x8s should have 4" bs. If you use 4.5 bs then your are tucking the wheels in. I'm running 18x9 with 4.5 bs on the 69 and achieved IMO an excellent width stance [with totally stock suspension], and the wheel house flares on the newer C-3s 'just scream give me wider wheels'. T
Old 02-22-2017, 07:59 PM
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roscobbc
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Originally Posted by terrys6t8roadster
Standard wheel width on C-3s is 8" with approximately 4" back spacing [except 68]. 18x8s should have 4" bs. If you use 4.5 bs then your are tucking the wheels in. I'm running 18x9 with 4.5 bs on the 69 and achieved IMO an excellent width stance [with totally stock suspension], and the wheel house flares on the newer C-3s 'just scream give me wider wheels'. T
I know '68 had 7" wide wheels as stock - what was the backspace?
Old 02-22-2017, 09:17 PM
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AboveTheLogic
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Originally Posted by Kacyc3
what is DGMTML?
No idea, I was hoping someone here would know and chime in. I just ordered the set and went to the shop and said if they don't fit I'm not buyin' em.
Old 02-22-2017, 11:50 PM
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Originally Posted by terrys6t8roadster
Standard wheel width on C-3s is 8" with approximately 4" back spacing [except 68]. 18x8s should have 4" bs. If you use 4.5 bs then your are tucking the wheels in. I'm running 18x9 with 4.5 bs on the 69 and achieved IMO an excellent width stance [with totally stock suspension], and the wheel house flares on the newer C-3s 'just scream give me wider wheels'. T
I realize that but finding a wheel I like with 18x8 4" bs without doing custom wheels is a bitch. I doubt a wider tire with 27 height will fit.
Old 02-23-2017, 03:37 AM
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Originally Posted by roscobbc
I know '68 had 7" wide wheels as stock - what was the backspace?
Can't answer that one, my 6t8 came with 8"s on it. T
Old 02-23-2017, 04:03 AM
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Originally Posted by Kacyc3
I realize that but finding a wheel I like with 18x8 4" bs without doing custom wheels is a bitch. I doubt a wider tire with 27 height will fit.
I feel your pain, when I was looking at wheels I saw the same thing. What year is your vette? Have you looked at 18x9s? The only mod you might have to make is relocating the p/b cable mount for 4.5 b/s. I'm not even sure if that mod is necessary, but some one here can answer that. I had 1 rusted t/a so I put offset ones on and am running 18x10 with 5"b/s on rear. Our vettes are so cool looking you don't want to loose that wide track look they have. IMO our vettes look the best with a 50% back spacing. T
Old 02-23-2017, 09:48 AM
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Originally Posted by terrys6t8roadster
I feel your pain, when I was looking at wheels I saw the same thing. What year is your vette? Have you looked at 18x9s? The only mod you might have to make is relocating the p/b cable mount for 4.5 b/s. I'm not even sure if that mod is necessary, but some one here can answer that. I had 1 rusted t/a so I put offset ones on and am running 18x10 with 5"b/s on rear. Our vettes are so cool looking you don't want to loose that wide track look they have. IMO our vettes look the best with a 50% back spacing. T
It's a 79 I have 18x9 with 5"bs on rear but can't find the wheels I like for front with 4" bs
Old 02-23-2017, 10:11 AM
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resdoggie
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Originally Posted by Kacyc3
Is anyone running this combination without spacers and with 27" tall tires?
I am and no rubbing/interference. Did you get my pics I sent you? The wheel sits too far inboard for my liking but I'm stuck with that due to clearance issues when I put a 1-1/4" spacers on. Had the exact look I wanted but it rubbed.

Last edited by resdoggie; 02-23-2017 at 10:12 AM.
Old 02-23-2017, 01:33 PM
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Originally Posted by resdoggie
I am and no rubbing/interference. Did you get my pics I sent you? The wheel sits too far inboard for my liking but I'm stuck with that due to clearance issues when I put a 1-1/4" spacers on. Had the exact look I wanted but it rubbed.
I did get them, were they with or without spacers? With as much as a PITA this is becoming wonder what it would take to set th ebody on a c4 chassis?
Old 02-23-2017, 06:14 PM
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resdoggie
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The pics were without spacers. The body on my car is shifted to the left by a 1/4". I'm not sure why but I'm the third owner. I attribute the misalignment for the tire rubbing the fenders with a spacer that I tried. One tire rubbed the front of the fender during turning and the other tire rubbed the rear of the fender. A tire diameter of 26-1/2" or less probably wouldn't have any interference on MY car with a spacer.
Old 02-24-2017, 05:40 AM
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terrys6t8roadster
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Originally Posted by Kacyc3
It's a 79 I have 18x9 with 5"bs on rear but can't find the wheels I like for front with 4" bs
18x9 with 4.5 b/s is a perfect fit on the front with stock suspension. T
Old 03-05-2017, 10:24 AM
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Originally Posted by Kacyc3
Is anyone running this combination without spacers and with 27" tall tires?
I have 18x8-4.5 in front and rear of my '80 with 255x45-18 Goodyear Eagle F1 SUPERCAR tires all around. Both front tires rubbed on the frame at full turn with Steeroids. I fixed the problem with 3/8" hub centric spacers our son made with extended conical lug nuts to grab enough thread to be safe.



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