Wheel backspacing on C3?
Thread Starter
Racer
Joined: Sep 2007
Posts: 370
Likes: 5
From: Bradley Il.
2017 C3 of the Year Finalist
Wheel backspacing on C3?
I hope someone knows, Will a wheel with a 4.5 backspace fit a C3 (74) with out a prblem. The ones I want only come that way in a 15x8 unless I go custom.
Thanks Jim
Thanks Jim
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
I have 17" rims with a 4.5" BS and I had to move the parking brake bracket on top of the trailing arm because it hit the rim in the stock location.
I think you will at least have that issue for sure
I think you will at least have that issue for sure
Melting Slicks
Joined: Jul 2005
Posts: 2,545
Likes: 3
From: 406ci SB, AFR 180 Heads - 490 HP @5,600 RPM 529 lb-ft @ 4,100 RPM
Pull one of your rims, lay a bar across the back of the rim, measure from the back of the rim to the bar. You will now know what the rim backspace your running now is.
I run 4.5 BS on both our 72 & 79 Vettes, no issues, some years have different issues, some must remove the emerg. brake bracket to the top, some need wheel spacers, do the quick check of what you have now
I run 4.5 BS on both our 72 & 79 Vettes, no issues, some years have different issues, some must remove the emerg. brake bracket to the top, some need wheel spacers, do the quick check of what you have now
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
It depends on what size tires you are using.. It also depends on your trailing arms etc..
I personally use 15 x 10 wheels with 4.5 inch backspacing with ET Drag 28 x 10.5W - 15 slicks.. However, my frame is modified for extra clearance and I'm using offset trailing arms..
I personally use 15 x 10 wheels with 4.5 inch backspacing with ET Drag 28 x 10.5W - 15 slicks.. However, my frame is modified for extra clearance and I'm using offset trailing arms..
Instructor
Joined: Jun 2007
Posts: 128
Likes: 0
From: San Antonio Texas
This is a REALLY good point because I would like to know if 16 X 8's are acceptable without ANYmodification? But I know I'll need to do something about it. Any suggestions other than modifing my FRAME>?
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
I ran 15 x 8 wheels with 4" backspacing. I recall a stock aluminum 15 x 8 (later C3s) actually had 4.125" backspacing.
I currently run 17 x 8 wheels with absolutely no modifications. Either 245/45 or 255/40s fit well with no interfereces anywhere.
I currently run 17 x 8 wheels with absolutely no modifications. Either 245/45 or 255/40s fit well with no interfereces anywhere.
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