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Failure of folding bike -- user error or bad manufacturer?



 
 
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  #1  
Old August 23rd 05, 10:31 PM
Jasper Janssen
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Default Failure of folding bike -- user error or bad manufacturer?


http://members.lycos.nl/dezolderkamer/fiets/album/

The set of photos shows a small, cheap folding bike which after several
years of service had the steerer break off, leaving the bike
uncontrollable and resulted in a crash. Consensus on the Dutch group by
now is that it was, in fact, shoddy manufacture. Comments?


Jasper
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  #2  
Old August 24th 05, 07:08 AM
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Default Failure of folding bike -- user error or bad manufacturer?

Anything made of metal can eventually break. I've never seen this part
break before but I've had pedal spindles, seat-pins, several bicycle
frames etc break.

What do you expect when you buy something cheap??

  #3  
Old August 24th 05, 05:51 PM
Jasper Janssen
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Default Failure of folding bike -- user error or bad manufacturer?

On 23 Aug 2005 23:08:19 -0700, "
wrote:

Anything made of metal can eventually break. I've never seen this part
break before but I've had pedal spindles, seat-pins, several bicycle
frames etc break.

What do you expect when you buy something cheap??


Well, not my bike. But notice that the headset and stem construction is
different from what is normal for threaded headsets. The steerer extends
out of the headset, and there is an external clamp on it that will
compress the steerer (using the slot), to grip the stem that does not
itself have any clamping action going, but is a smooth tube which does not
quite fit perfectly inside the steerer.

Jasper
  #4  
Old August 25th 05, 03:43 PM
Alex Rodriguez
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Default Failure of folding bike -- user error or bad manufacturer?

In article ,
says...

http://members.lycos.nl/dezolderkamer/fiets/album/
The set of photos shows a small, cheap folding bike which after several
years of service had the steerer break off, leaving the bike
uncontrollable and resulted in a crash. Consensus on the Dutch group by
now is that it was, in fact, shoddy manufacture. Comments?


Improperly threaded steerer? The break is on the threaded section of steerer.
Since the threading process cuts into the tube, it is weaker at that location.
Maybe they cut too deep? The tube they used was too thin? Who knows?
---------------
Alex


 




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