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Thread: Original S30 wheel offset?

  1. #1
    Registered User RP975's Avatar
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    Cool Original S30 wheel offset?

    Hi Guys,

    I have searched and have found differing answers to the original S30 wheel offset, some say -15, some say +15 and others say 0 offset.

    I have a 1974 260Z with dealer fitted slot mags that are 14' x 6" with 0 offset.
    When I look at the Datsun workshop manual for a US 280Z, it states that the offset is 15, but it doesn't say if it is + or -.

    Does anyone know what the standard offset is, or can somebody with a standard wheel measure the backspace and width for me please?

    Cheers Rob

  2. #2
    Semi-retired admin Arne's Avatar
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    Definitely +15 on the factory steel wheels. There's more backspace than 'frontspace'.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

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    Registered User d240zx2's Avatar
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    There may be a difference between 240s and other S30s. My 70 requires Zero offset, else an expensive alignment is called for.

    Frank
    First & Third owner of HLS30-00721
    B. 01/70 D. 03/12

    New owner of HLS30-15653
    B. 12/70 D.

    Frank in Houston, Texas

  4. #4
    Semi-retired admin Arne's Avatar
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    No, we're talking the factory steel wheels here. Wider mag wheels are a totally different kettle of fish.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

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    Registered User RP975's Avatar
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    Thanks guys for your input with this, now I can work out what I am going to do about wheels.I have a ford 5 stud pattern now and want to find some 16x7" mags.
    I can only increase the track by 25mm, and the front hubs that I have have already taken up 9mm each side.
    I am in NSW , Australia and the rules are fairly strict for mods.

    Rob

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    Administrator bpilati's Avatar
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    A guy at MSA said that they finally got Nissan to admit that the figure in the service manual is in error and should read zero. That's what my new Konigs are too. So Arne, you're saying that zero is wrong?
    Last edited by bpilati; 03-08-2008 at 08:58 AM.
    Bryan Pilati
    1971 Datsun 240Z (8/71; 920 paint)
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    I'm never serious unless I should be.

  7. #7
    Semi-retired admin Arne's Avatar
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    Yup. Zero only applies for wheels that are wider than stock. Measure the backspace of your stock steel wheel. For a 4.5" wheel ('70-72) the backspace will be in the neighborhood of 3.25-3.35". For a 5" ('73-78) it will be around 3.625". Those are not zero offset.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  8. #8
    grind it till ya find it
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    what's a good width and offset for a 77 so the wheel is flush with the fender or a lil past the fender
    93 mr2 turbo
    89 mr2 20v
    77 280z
    07 tacoma 4x4

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