The Camaro Club (UK)
http://classiccamaroclub.mfatw.com/

Wheel / Bolt patterns
http://classiccamaroclub.mfatw.com/viewtopic.php?f=39&t=3407
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Author:  78 Camaro [Tue Sep 17, 2013 12:44 pm ]
Post subject:  Wheel / Bolt patterns

A very handy list of many cars and their lug patterns etc (inc. Camaro's):

http://adaptitusa.com/referencebook.htm

Key Info for us:

CAMARO, 67-81
Lug pattern: 5 X 120.7mm (5 X 4 3/4")
Lug thread: 7/16-RH
Centre Bore: 70.3mm

CAMARO, 82-02
Lug pattern: 5 X 120.7mm (5 X 4 3/4")
Lug thread: 12mm X 1.5
Centre Bore: 70.3mm

Here's a great link explaining how bolt patterns are measured, what offest is and how it's calculated (includes a chart) etc:

https://www.rsracing.com/tech-wheel.html

Author:  chevy-stu [Tue Sep 17, 2013 6:57 pm ]
Post subject:  Re: Wheel / Bolt patterns

I found another site once ages ago that had most of that but the backspacing (offset) instead of the bolt thread sizes...

Author:  78 Camaro [Wed Sep 18, 2013 1:57 pm ]
Post subject:  Re: Wheel / Bolt patterns

That would be useful too! If you find, do post it and i'll merge it into the main post. I've added another link that helps with identifying offset.

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