Question on Back Spacing
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Melting Slicks
Joined: Oct 2004
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From: Northern MN
St. Jude Donor '13-'14-'15-'16-'17
Question on Back Spacing
I would like to change the wheels out on my 66. What is the correct back spacing needed? I am un-informed (dumb) at this so I need help.
Steve
Steve
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From: NorCal
It depends on details. If you move the parking brake brackets from the sides to the tops of the trailing arms you gain a lot of room for additional backspacing. In the case of my 67, I went to 17X7 aftermarket wheels with 4.75" backspacing, which allows tires up to 245/45 size.
Melting Slicks
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If you're looking for the original '66 offsets: steel wheels were 15x5.5 with a .44 offset; Aluminum knock-off wheels were 15x6 with a .61 offset.
Thread Starter
Melting Slicks
Joined: Oct 2004
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From: Northern MN
St. Jude Donor '13-'14-'15-'16-'17
Thanks for the reply. What I have on the car now is a set of old bolt-ons and I would like to go to some American 200S units. I like the looks of the "Daisy" wheel. I have to believe that there is a set of those that I can put on without altering the parking brake brackets.
Thread Starter
Melting Slicks
Joined: Oct 2004
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From: Northern MN
St. Jude Donor '13-'14-'15-'16-'17
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From: Helsingborg
It depends on details. If you move the parking brake brackets from the sides to the tops of the trailing arms you gain a lot of room for additional backspacing. In the case of my 67, I went to 17X7 aftermarket wheels with 4.75" backspacing, which allows tires up to 245/45 size.
4,75" is that from the back of the rim to the part that meets the car?
Last edited by Holmqvistar; Sep 16, 2015 at 03:07 PM.
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From: NorCal
Yes, that is correct.
Here's a website that explains wheel terms: http://tires.about.com/od/understand...ackspacing.htm
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From: Helsingborg
Yes, that is correct.
Here's a website that explains wheel terms: http://tires.about.com/od/understand...ackspacing.htm
Here's a website that explains wheel terms: http://tires.about.com/od/understand...ackspacing.htm
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From: NorCal
I don't know, but someone else here on the forum will. I have a 67 with 17-inch diameter wheels that are are 7 inches wide, with 4.75-inch backspacing and zero offset, but of course my car has disc brakes.
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Back when I had drums on my 64 I had 15x10 rims with 3.75" backspace. The tire sidewall was uncomfortably close to my leaf spring. But I never had a problem. The new trailing arms with disc brakes moved the wheels out a bit. The 200S wheel cleared the new calipers. Now I am running 17s by ET.
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