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Broken tandem forks

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UK and Europe
Published
9 June 2004
Last activity
9 June 2004
Original author
Anonymous
Posts
7
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Public discussion
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  1. Friends with a thorn adventure had their forks fail on
    them at the steerer/crown. These are the funny thorn two-
    plate ones.

    Fortunately the failure mode was the steerer tube
    cracking/becoming detached from the bottom plate, giving a
    horrible wobble but no actual crash.

    Funnily enough they don't trust adventure forks any more,
    but will give the stronger discovery ones a go. I reckon
    this is a fair replacement - I wouldn't expect any rigid
    forks on a touring bike to fail without a crash, since they
    are such a safety critical item.

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    So, what think the general public?

    cheers, clive

    (x-post to tandem@hobbes)

  2. Clive George said:

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    So, what think the general public?

    I think he should bloody well be happy to upgrade the fork
    for free; just to save face. Specialized upgraded my forks
    without even being asked when mine developed a crack -- they
    are big enough to shrug off a single customer's
    dissatisfaction should they choose to.

  3. in message <[email hidden]>, Clive George

    Quoted message said:

    Friends with a thorn adventure had their forks fail on
    them at the steerer/crown. These are the funny thorn two-
    plate ones.

    Fortunately the failure mode was the steerer tube
    cracking/becoming detached from the bottom plate, giving a
    horrible wobble but no actual crash.


    [snip]

    Quoted message said:

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    Pooffffft!

    Had this tandem ever been crashed? Had it been used on
    excessively rough surfaces for excessive distances?

    If not I'd be extremely unimpressed.

    --
    [email hidden] (Simon Brooke)
    jasmine.org.uk~simon

    ;; single speed mountain bikes: for people who cycle
    on flat mountains.

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

    Quoted message said:

    in message <[email hidden]>,
    Clive George

    Quoted message said:


    Quoted message said:

    Friends with a thorn adventure had their forks fail on
    them at the steerer/crown. These are the funny thorn two-
    plate ones.

    Fortunately the failure mode was the steerer tube
    cracking/becoming detached from the bottom plate, giving
    a horrible wobble but no actual crash.


    [snip]

    Quoted message said:

    Mr Thorn has offered the discovery forks as a
    replacement for 50 quid extra - I think he should give
    them for free.

    Pooffffft!

    Had this tandem ever been crashed?

    No.

    Quoted message said:

    Had it been used on excessively rough surfaces for
    excessive distances?

    Not IMO (depends on your definition of excessively rough of
    course - it certainly hasn't been used for serious MTBing).
    It's two years old, so hasn't gone that far either.

    Quoted message said:

    If not I'd be extremely unimpressed.

    Indeed.

    cheers, clive

  5. Clive George said:

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    When my Stinger frame failed the manufacturers summplied
    a complete new frameset (including forks) and a set of
    Home Mono Minis as a goodwill gesture. Robin is being a
    skinflint. Doesn't surprise me, mind. I had no
    particular problem with him, but he does drive a
    notoriously hard bargain.

    Guy

  6. Clive George said:

    Friends with a thorn adventure had their forks fail on
    them at the steerer/crown. These are the funny thorn two-
    plate ones.

    Fortunately the failure mode was the steerer tube
    cracking/becoming detached from the bottom plate, giving a
    horrible wobble but no actual crash.

    Funnily enough they don't trust adventure forks any more,
    but will give the stronger discovery ones a go. I reckon
    this is a fair replacement - I wouldn't expect any rigid
    forks on a touring bike to fail without a crash, since
    they are such a safety critical item.

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    So, what think the general public?

    It could be a one off rather than a design issue in which
    case there is no reason not to just replace them. I would be
    inclined though to quiz him thoroughly on the design
    adequacy of the forks and make clear that you are only
    accepting them on his assurances thereby putting the onus
    for a repeat failure and responsibility for any consequences
    on him. I would be inclined to repeat this in writing to
    him. He is then putting himself at great risk if he is
    trying to palm off an inadequate fork. If he gives those
    assurances I would be inclined then to accept the straight
    replacement and keep an eye on
    it. We'd all like an upgrade when something fails but the
    only rationale other than goodwill for demanding one
    is if there is clearly a design or generic
    manufacturing failure. Even the tightly regulated
    aircraft industry has occassional mechanical failures.

    Tony

  7. Clive George said:

    Friends with a thorn adventure had their forks fail on
    them at the steerer/crown. These are the funny thorn two-
    plate ones.

    Fortunately the failure mode was the steerer tube
    cracking/becoming detached from the bottom plate, giving a
    horrible wobble but no actual crash.

    Funnily enough they don't trust adventure forks any more,
    but will give the stronger discovery ones a go. I reckon
    this is a fair replacement - I wouldn't expect any rigid
    forks on a touring bike to fail without a crash, since
    they are such a safety critical item.

    Mr Thorn has offered the discovery forks as a replacement
    for 50 quid extra - I think he should give them for free.

    I take it that a pair of replacement Adventure forks would
    have been free under the lifetime warranty? I suppose it's
    fair to charge the difference in price if this is the case,
    but I'd be interested in how seriously he's taking the
    failure of the original ones. It sounds like poor brazing to
    me, since really slender steel forks can stand up perfectly
    well to rough roads.

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