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Broken tandem forks

Started by Clive George · · Last activity · 7 posts · 299 views

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UK and Europe
Published
9 June 2004
Last activity
9 June 2004
Original author
Clive George
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

    (') 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) http://www.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

    (') 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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