Mountain Bikes · Public discussion

Steering tube size

Started by MTBlood · · Last activity · 15 posts · 487 views

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Mountain Bikes
Published
18 April 2005
Last activity
19 April 2005
Original author
MTBlood
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15
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  1. I'm looking to buy new forks. I've noticed that many sold come with a 1
    1/8" steering tube diameter, some I've noticed larger but none smaller.
    I measured the tube diameter on my '04 GT I-Drive, which has a Rock
    Shox Pilot fork and it measured 1" evenly. Would this be a correct
    measurement? Is a 1" steering tube common? Will the 1 1/8" work? Also I
    noticed that when I disassembled the headset I could remove the fork
    from the frame easily. I was always under the impression that forks
    were press fit into the frame and you had to have a tool to remove
    them. Am I correct in assuming this, and if I am is there a problem if
    I can remove mine by hand?

  2. "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    I'm looking to buy new forks. I've noticed that many sold come with a 1
    1/8" steering tube diameter, some I've noticed larger but none smaller.
    I measured the tube diameter on my '04 GT I-Drive, which has a Rock
    Shox Pilot fork and it measured 1" evenly. Would this be a correct
    measurement? Is a 1" steering tube common? Will the 1 1/8" work? Also I
    noticed that when I disassembled the headset I could remove the fork
    from the frame easily. I was always under the impression that forks
    were press fit into the frame and you had to have a tool to remove
    them. Am I correct in assuming this, and if I am is there a problem if
    I can remove mine by hand?

    1 1/8" is the usual size. The headset is the component that is press fit
    into the frame.

    http://www.parktool.com/repair_help/FAQindex.shtml

    point your mouse at the headset on the bike picture

    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest, I've just wasted.

  3. So I would be safe to assume that the 1 1/8" fork I'm looking at should
    fit then....

  4. "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    So I would be safe to assume that the 1 1/8" fork I'm looking at should
    fit then....

    No, a 1 1/8" steerer tube will not fit into a 1" headset. Well, actually
    if you push hard enough it will.

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest, I've just wasted.

  5. D T W .../\... said:

    "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    So I would be safe to assume that the 1 1/8" fork I'm looking at
    should fit then....

    No, a 1 1/8" steerer tube will not fit into a 1" headset. Well,
    actually if you push hard enough it will.

    Then you just need training wheels, and you've got a drag racer!
    --
    Phil, Squid-in-Training

  6. I never press fitted a fork yet,just the headset cups
    to frame. If a tube is rusted it may need some help,yours didn't. Make
    sure you measured right out tube dia. An 04 should be 1 1/8 or bigger.

  7. Ok...I see...looks like I'm going to be limited with having the 1"
    headtube.

  8. MTBlood said:

    Ok...I see...looks like I'm going to be limited with having the 1"
    headtube.

    Marzocchi.

  9. What is funny is that I as well have an '02 Giant AC2 with a Rock Shox
    Psylo, I removed the top cap from the headset and it measured 1" also.
    Maybe I am measuring wrong, is there a proper way? I'm just measuring
    across the top of the steering tube with a tape measure.

  10. "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Ok...I see...looks like I'm going to be limited with having the 1"
    headtube.

    show us your bike on a website url.

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest, I've just wasted.

  11. "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Ok...I see...looks like I'm going to be limited with having the 1"
    headtube.

    I can't believe that you have a 1" headset on that bike!

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest, I've just wasted.

  12. "MTBlood" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Ok...I see...looks like I'm going to be limited with having the 1"
    headtube.

    What's the inside diameter of one of the headset spacers stacked around the
    steerer tube?

    --
    DTW .../\.../\.../\...

    I've spent most of my money on mountain biking and windsurfing.
    The rest, I've just wasted.

  13. MTBlood said:

    What is funny is that I as well have an '02 Giant AC2 with a Rock Shox
    Psylo, I removed the top cap from the headset and it measured 1" also.
    Maybe I am measuring wrong, is there a proper way? I'm just measuring
    across the top of the steering tube with a tape measure.

    1/8th of an inch isn't that much. Take your forks off and measure them with
    some vernier calipers.

    OTOH, tape measures are often crappy at the end (those metal tags etc.), so
    try measuring from 1" onwards on the tape. And you're measuring outside
    diameter, not internal...

  14. MTBlood said:

    I'm looking to buy new forks. I've noticed that many sold come with a 1
    1/8" steering tube diameter, some I've noticed larger but none smaller.
    I measured the tube diameter on my '04 GT I-Drive, which has a Rock
    Shox Pilot fork and it measured 1" evenly. Would this be a correct
    measurement? Is a 1" steering tube common? Will the 1 1/8" work? Also I
    noticed that when I disassembled the headset I could remove the fork
    from the frame easily. I was always under the impression that forks
    were press fit into the frame and you had to have a tool to remove
    them. Am I correct in assuming this, and if I am is there a problem if
    I can remove mine by hand?

    The i-drive head tube *is* 1 1/8"
    --
    Slack

  15. Thanks...this is the first time I have messed with this part of the
    bike. I was measuring wrong. The headset spacers are 1 1/8". It was a
    little hard for me to believe that 2 common different brand bikes had
    uncommon steering tube diameters. I dug into it a little deeper and saw
    how to measure the 1 1/8".

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