Cycling Equipment · Public discussion

Questions about Tubes...

Started by David White · · Last activity · 3 posts · 498 views

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Cycling Equipment
Published
30 May 2004
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30 May 2004
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David White
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  1. While working on my wife's bike today, I have again had
    problems with tubes. The one in her (normally flat from lack
    of use) front tire simply would not inflate. Turns out it
    had a big slice or cut in it. I have no idea how it got
    there. When I pulled out her spare tube, it was pretty much
    disintegrating along the edges of the rolled-up tube and
    would not hold air either.

    So I pulled a tube out of the bag on one of my bikes. It
    wouldn't hold air either - had a small slit in it. I have
    patched it and it is holding air now. The others were only
    for the trash bin. I just don't understand this. I am not
    sure of the brand on these tubes but all seemed different.
    Will tubes just get old and fall apart/rot sitting around?

    This is not the first time I have had groups of tube
    failures like this. In one seat bag on a ride I found three
    Specialized tubes all failed on a "seam" or line on the
    exterior surface while looking for a tube to fix a flat. I
    assumed that I had gotten a number of tubes from a defective
    batch from Specialized. But now I am starting to wonder.

    I have several bikes, each of which has its own seat pack
    with spare tubes and rag. Since the bikes get ridden in
    rotation, the bikes simply hand in my furnace room in the
    basement most of the time. But this room is not overly hot
    or cold. Any ideas on what is happening?

    Thanks.

  2. David White said:

    While working on my wife's bike today, I have again had
    problems with tubes. The one in her (normally flat from
    lack of use) front tire simply would not inflate. Turns
    out it had a big slice or cut in it. I have no idea how it
    got there. When I pulled out her spare tube, it was pretty
    much disintegrating along the edges of the rolled-up tube
    and would not hold air either.

    So I pulled a tube out of the bag on one of my bikes. It
    wouldn't hold air either - had a small slit in it. I have
    patched it and it is holding air now. The others were only
    for the trash bin. I just don't understand this. I am not
    sure of the brand on these tubes but all seemed different.
    Will tubes just get old and fall apart/rot sitting around?

    A big slice normally means the tyre popped off the rim at
    some time. Yes, they do rot - as I found the other week when
    a tube I'd had hanging around for years shredded itself
    round the valve as I pumped up the tyre. It was perished.

  3. On Sun, 30 May 2004 00:35:27 GMT, David White

    may have said:

    Will tubes just get old and fall apart/rot sitting around?

    Yes, particularly if there is a lot of ozone in the
    environment, or if their surfaces have been contaminated
    with any number of things that can degrade the butyl.

    Quoted message said:

    I have several bikes, each of which has its own seat pack
    with spare tubes and rag. Since the bikes get ridden in
    rotation, the bikes simply hand in my furnace room in the
    basement most of the time. But this room is not overly hot
    or cold. Any ideas on what is happening?

    Cloth bags, I'll bet, and the furnace blower motor is
    producing ozone as the brushes spark. If you have nowhere
    else to park the bikes, try putting each of the tubes
    inside a heavy, sealed polyethylene bag to reduce the
    failure rate. You'll probably notice that rubber bands on
    things in the furnace room also don't last. There's not
    much you can do to reduce the ozone level other than
    suction ventilate the motor cavity to the outdoors, and
    that's probably not an option.

    --
    My email address is antispammed; pull WEEDS if replying via
    e-mail. Typoes are not a bug, they're a feature. Words
    processed in a facility that contains nuts.

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