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Diagnosing a wheel problem?

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01 / Original postDiagnosing a wheel problem?BluntRM · 5 Nov 2006 02 / This pagePosts 1–15Page 1 of 1 · chronological order 03 / Latest replyPost #15BluntRM · 22 Nov 2006

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Original section
rec.sport.unicycling
Published
5 November 2006
Last activity
22 November 2006
Original author
BluntRM
Posts
15
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Public discussion
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439
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Topics
Brake padsElectronic shifting

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  1. Original post
    BluntRM
    Archived post
    #1

    So here it is:
    *
    The wheel on a new unicycle sits far too close to one side*, about 3/4"
    space between the frame on the Left side and less than 3/8" on the
    Right side.

    *When the wheel is flipped the gaps also switch, keeping those same
    dimensions, but on the different sides*, now 3/4" on the Right 3/8" on
    the Left.

    *This would indicate a problem with wheel and not the frame*...

    *What should I be checking, adjusting, etc.?* What are the obvious
    solutions--- it's a Qu-ax 20" Trials with the yellow hub --- if anyone
    else has run into this problem or could share their
    knowledge/experience, it would be great to read it. 🙂

    --
    BluntRM

    "Man has, as it were, become a kind of prosthetic god. When he puts on
    all his auxiliary organs he is truly magnificent; but those organs have
    not grown on to him and they still give him much trouble at times."
    Sigmund Freud, -Civilization and Its Discontents-
    '
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  2. onelesscar
    Archived post
    #2

    It's dished incorrectly. Tighten up all the spokes on the side that has
    the bigger gap by about 1/2 turn each, then check again.

    --
    onelesscar

    "It's f*$%^*g raining!"
    "Well, is it f*$%^*g or is it raining?"

    "That car was -melting-????"
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  3. harper
    Archived post
    #3
    onelesscar said:

    It's dished incorrectly. Tighten up all the spokes on the side that has
    the bigger gap by about 1/2 turn each, then check again.

    Good point but don't just tighten the ones on the too big gap side to
    fix it. First, tighten those as mentioned. On the next iteration,
    loosen all the spokes on the too small side. Then tighten the too big
    gap side again. Then loosen, and so on.

    --
    harper

    -Greg Harper

    B L U E S H I F T

    *jc is the only main man. there can be no other.*
    Finally made it to my (n+1)th post....* TOTALLY AWESOME!!!*

    Quoted message said:

    <> Unicycle For the Chafing <><


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  4. BluntRM
    Archived post
    #4

    Thanks. Seems to be it.

    --
    BluntRM

    "Man has, as it were, become a kind of prosthetic god. When he puts on
    all his auxiliary organs he is truly magnificent; but those organs have
    not grown on to him and they still give him much trouble at times."
    Sigmund Freud, -Civilization and Its Discontents-
    '
    Marxist Internet Archive' (http://www.marxists.org/)
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  5. BluntRM
    Archived post
    #5

    So..................

    The LBS couldn't fix it cheaply: With a new wheel, if the cost of
    fixing it is less than the hassle of returning it I'd consider the
    option-- it wasn't. I returned it. Just over two weeks later, it came
    back. Whatever UDC did to fix it, the wheel is still offset on the
    frame with a 2.5:1 gap ratio favoring the left.

    I don't know what UDC did; I'm thinking it needs to be rebuilt, but I'd
    rather defer to the forum for a an informed opinion.

    Ideas?

    --
    BluntRM

    "Man has, as it were, become a kind of prosthetic god. When he puts on
    all his auxiliary organs he is truly magnificent; but those organs have
    not grown on to him and they still give him much trouble at times."
    Sigmund Freud, -Civilization and Its Discontents-
    '
    Marxist Internet Archive' (http://www.marxists.org/)
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  6. onelesscar
    Archived post
    #6

    Pictures please? Honestly, I don't see what's so weird about it. It's
    just improperly dished. Just get out your spoke wrench, and you can fix
    it in like 15 mins. Machine built wheels can't be expected to be
    perfect all the time.

    --
    onelesscar

    "It's f*$%^*g raining!"
    "Well, is it f*$%^*g or is it raining?"

    "That car was -melting-????"
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  7. Borgschulze
    Archived post
    #7

    The frame isn't the same lengths on the bearing brackets, you need a
    small (1mm thick) shim to put in the bearing holder.

    --
    Borgschulze

    Spare some change for a new unicycle?
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  8. One on one
    Archived post
    #8
    Borgschulze said:

    The frame isn't the same lengths on the bearing brackets, you need a
    small (1mm thick) shim to put in the bearing holder.

    That's unlikely where the gap changes side when the wheel is flipped.
    The original assessment about dishing the wheel should fix the problem.

    --
    One on one

    "That's going to end up in somebody's sig." - rob.northcott
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  9. skilewis74
    Archived post
    #9
    Borgschulze said:

    The frame isn't the same lengths on the bearing brackets, you need a
    small (1mm thick) shim to put in the bearing holder.

    But the problem is the same on the other side if he flips the wheel.

    I think it's still a problem w/ the spokes.

    I had this same problem on my b*ke. The rim was rubbing the brake pad,
    but on only one side. So I did as Harper said, but only going in 1/4
    turn incriments, making sure the spokes retained the same overal
    tightness. But now it was rubbing on the other side only. 45 minutes
    after starting it was near perfect w/ a +/- 1/16" wobble, only
    noticable as a slight pulsing when I apply the brakes.

    --
    skilewis74
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  10. Borgschulze
    Archived post
    #10

    Just add a shim anyways.

    --
    Borgschulze

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  11. BluntRM
    Archived post
    #11
    onelesscar said:

    Pictures please? Honestly, I don't see what's so weird about it. It's
    just improperly dished. Just get out your spoke wrench, and you can fix
    it in like 15 mins. Machine built wheels can't be expected to be
    perfect all the time.

    I'll put a picture up when the camera is charged.
    I don't have a spoke wrench.

    Here's the the thing, the LBS was -loosening -the tension on the wheel
    when the spoke stripped out of the nipple. They recommended a rebuild
    stating that there's too much tension to properly adjust the spokes
    alone, so I sent it back to UDC who presumably did something to it, at
    least fixing the stripped spoke, but it sits the same way. This might
    just be a full on return because I'm not interested in re-shipping for
    every trouble shoot and I don't think paying out to fix a -new -wheel
    is a fair deal.

    Any thoughts? It rides fine, but my suspicion is that the dish will
    effect it eventually.

    Step one: Find out what UDC did.
    Step two: ....?

    --
    BluntRM

    "Man has, as it were, become a kind of prosthetic god. When he puts on
    all his auxiliary organs he is truly magnificent; but those organs have
    not grown on to him and they still give him much trouble at times."
    Sigmund Freud, -Civilization and Its Discontents-
    '
    Marxist Internet Archive' (http://www.marxists.org/)
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  12. One on one
    Archived post
    #12
    BluntRM said:

    Any thoughts? It rides fine, but my suspicion is that the dish will
    effect it eventually.

    Step one: Find out what UDC did.
    Step two: ....?

    Buy a spoke wrench, and do what was suggested in prior posts. The
    wrench may set you back $7.oo. You'll learn how to fix your wheel and
    have a tool for the future.

    --
    One on one

    "That's going to end up in somebody's sig." - rob.northcott
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  13. Borgschulze
    Archived post
    #13

    Or spend 30 seconds putting something in to shim the bearing and never
    worry about it again.

    --
    Borgschulze

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  14. onelesscar
    Archived post
    #14

    ^^^^that's not the problem. If you do that as a makeshift solution, an
    improperly dished wheel won't be as strong as a correctly dished one,
    so it's only treating the symptoms, not the cause.

    --
    onelesscar

    "It's f*$%^*g raining!"
    "Well, is it f*$%^*g or is it raining?"

    "That car was -melting-????"
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  15. BluntRM
    Archived post
    #15
    One on one said:

    Buy a spoke wrench, and do what was suggested in prior posts. The wrench
    may set you back $7.oo. You'll learn how to fix your wheel and have a
    tool for the future.

    Agreed. I just assumed that's what UDC would have done.

    --
    BluntRM

    "Man has, as it were, become a kind of prosthetic god. When he puts on
    all his auxiliary organs he is truly magnificent; but those organs have
    not grown on to him and they still give him much trouble at times."
    Sigmund Freud, -Civilization and Its Discontents-
    '
    Marxist Internet Archive' (http://www.marxists.org/)
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