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Old 09-27-11 | 04:19 PM
  #28  
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surgeonstone
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Joined: Oct 2005
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From: South Bend IN

Bikes: 1976 FRESCHI, 2004 Crumpton.

Originally Posted by slimrider
ah...that's not my point.

My point is the following in the form of a question:

Given say the top tube of a cf frame;

when its struck in a small area (let's say a pebble kicked back by an eighteen wheeler truck);

how is the top tube compromised and why?

I'd just like to have that question answered by a materials expert.

- slim
good question. I have a good friend who works in an lbs dealing cervelo's and he tells me how surprised he is at the number of frame failures he encounters with cf that he has never seen with steel. Recently had a guy return a top end cervelo- the problem?- at 4 mpf the handlebar swung backwards with the bar end hitting the top tube and shattering it- at 4mph. What really amazes him is how everyone seems to accept it without complaints.
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