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  1. #1
    Genius FlatMaster's Avatar
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    Measuring threaded headest

    I'm looking to build my arsenal of tools and rebuild my headset. I'm working with a Specilized Cirrus from the 80's, so I'm not sure what size I have. What's the best way to actulally measure the size of the headset nut? I can immagine taking two straight edges on opposite ends of the nut, then measuring the distance between these opposite lines. Any other ideas?
    Ride or Die

  2. #2
    AEO
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    Senior Member AEO's Avatar
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    digital calipers from the hardware store?
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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  3. #3
    cycles per second Gonzo Bob's Avatar
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    A large adjustable wrench. Most 1" threaded headset nuts are 32mm.

  4. #4
    Genius FlatMaster's Avatar
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    How many are most? I'm looking to order a tool online and I want it to fit.
    Ride or Die

  5. #5
    reTIRED JustCruisin's Avatar
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    Get a Vernier. You will need some accuracy with measurements and with a vernier you can measure in and ouside diameters. With a Digital you can do inch and metric.
    It's Not the destination, It's the Ride.

  6. #6
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    Quote Originally Posted by FlatMaster View Post
    How many are most? I'm looking to order a tool online and I want it to fit.
    All that have wrench flats. There were a few headsets (Shimano only?) that had scalloped lock nuts and took a proprietary wrench but these are obvious.

    Park makes a double-ended headset wrench with 32 and 36 mm openings for 1" and 1-1/8" threaded headsets.

    I agree with the recommendation to get a vernier or dial caliper. You will need to measure a lot of things as you get into bike mechanics and this is an essential tool.

  7. #7
    Old fart JohnDThompson's Avatar
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    Quote Originally Posted by FlatMaster View Post
    How many are most? I'm looking to order a tool online and I want it to fit.
    What kind of headset? Decent quality, non-French bikes from that era almost always followed the de facto Campy standard of 32mm.

  8. #8
    Your mom
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    Honestly, I've got 2 headset wrenches, and more often than not I end up using my 12" adjustable, because the headset wrench is a looser fit than I'd like and I don't want to round off the corners of the nut.

  9. #9
    Old fart JohnDThompson's Avatar
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    Quote Originally Posted by tellyho View Post
    Honestly, I've got 2 headset wrenches, and more often than not I end up using my 12" adjustable, because the headset wrench is a looser fit than I'd like and I don't want to round off the corners of the nut.
    You need a better headset wrench:


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