Re: Is this a crack in the chainstay?



S

Sean Kerslake

Guest
I would also guess that it is a crack but would'nt be too worried about it
unless your going on a long trip where failure would dump you in it. If it
is going to crack right through then it is unlikely it will fail suddenly -
unlike aluminium frames - just keep an eye on it.

It would suggest a crash to me - impact from the left side pushing the
chainstays to the right.

The quick, easy and cheap repair I have done on this sort of crack before is
too either build up a fillet of braze over the crack or silver solder a
small patch over the top - these are dependent on getting the metal very
clear of any corrosion. If any corrosion has started from the inside it
could be problematic. Replacing the chainstay would not be economic.

Steel frames are very resilient - they can stand alot of abuse and give you
good service with some major defects.

Sean

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

"Joe LoBuglio" <[email protected]> wrote in message
news:[email protected]
>I recently purchased a 1990 Trek 520. It is a lugged steel frame.
>
> I am concerned that there may be a crack in the non-driveside
> chainstay. Images of the area of concern are at
> http://tinyurl.com/b8zfg .
>
> I was wondering if anyone has seen anything like this before.
>
> I will be chipping the paint off to look at the bare metal but am
> hesitating in case there is some useful information that can be gleened
> from its original state. I will post pictures of the bare metal after
> folks have a chance to look at this.
>
> If this is a crack, can it just be repaired or need the entire stay be
> replaced?
>
> Thank you in advance.
>
> Joe LoBuglio
>
 
J

John Thompson

Guest
On 2005-06-15, Sean Kerslake <[email protected]> wrote:

> Steel frames are very resilient - they can stand alot of abuse and give you
> good service with some major defects.


And when they do fail, they tend to do so slowly enough that you have some
warning, unlike other materials that fail suddenly and catastrophically.

The point to keep in mind here is that the defect the OP describes may be
just such an "early warning" and ought to be investigated sooner rather
than later.

--

John ([email protected])
 

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