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.
18x8 4.5" bs on front?
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
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.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
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.
Burning Brakes
Joined: Apr 2013
Posts: 1,194
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From: Las Vegas NV
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
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
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From: Port St. Lucie Fl
Melting Slicks
Joined: May 2012
Posts: 2,192
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From: Allenton Wisconsin
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
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Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
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
Burning Brakes
Joined: Apr 2013
Posts: 1,194
Likes: 109
From: Las Vegas NV
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
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
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
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
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
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
Had a 1976 L-82, 4-sp
Joined: Mar 2011
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
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; Feb 23, 2017 at 10:12 AM.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
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From: Port St. Lucie Fl
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?
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
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.
Melting Slicks
Joined: May 2012
Posts: 2,192
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From: Allenton Wisconsin
Drifting
Joined: Sep 2006
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From: Columbus MN
