Re: Failed Zipp T2 Front Track hub pics



G

Gemma_k

Guest
"jim beam" <[email protected]> wrote in message
news:[email protected]
>> http://img6.picsplace.to/img.php?file=img6/24/arghZipp.JPG
>> http://img4.picsplace.to/img.php?file=img4/27/failedzipp.JPG

>
> looks like another victim of "tension as high as the rim can bear" to me.
> were they ever trued or "helped" by a wrench, or were these straight from
> factory?


Straight from the factory like that. Never touched them with a spoke wrench
(never had to, that is, until I had to remove 24 spokes from the rim to get
the hub out :-/
>
 
jim beam wrote:
> Gemma_k wrote:
> > For your holiday amusement:
> >
> > http://img6.picsplace.to/img.php?file=img6/24/arghZipp.JPG
> > http://img4.picsplace.to/img.php?file=img4/27/failedzipp.JPG

>
> looks like another victim of "tension as high as the rim can bear" to
> me. were they ever trued or "helped" by a wrench, or were these
> straight from factory?


Funny thing is, according to what I've read on this ng, zipp rims can
bear less than most, which would imply an even weaker than normal hub.
I would tend to think that this failure was not caused by excessively
high spoke tension, but by poor quality hubs.
 
G

Gemma_k

Guest
<[email protected]> wrote in message
news:[email protected]
>
> jim beam wrote:
>> Gemma_k wrote:
>> > For your holiday amusement:
>> >
>> > http://img6.picsplace.to/img.php?file=img6/24/arghZipp.JPG
>> > http://img4.picsplace.to/img.php?file=img4/27/failedzipp.JPG

>>
>> looks like another victim of "tension as high as the rim can bear" to
>> me. were they ever trued or "helped" by a wrench, or were these
>> straight from factory?

>
> Funny thing is, according to what I've read on this ng, zipp rims can
> bear less than most, which would imply an even weaker than normal hub.
> I would tend to think that this failure was not caused by excessively
> high spoke tension, but by poor quality hubs.


I don't know about that re: the rims - the track rim looks pretty beefy,
weighs in at 460g by my scales. The spokes were quite highly tensioned, no
sign of any of the spoke holes in the rims failing (touch wood!). The spoke
head holes in the hub perhaps are too deep, so the thickness of the flange
is really 'wasted' or overengineered, making a stress raiser across the
spoke holes?

My Suntour Supurbes are still holding up---supurbely - best hubs EVER :)

Gemma
 

daveornee

New Member
Sep 18, 2003
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