RE: [CR]Crank web cracks

(Example: Events:Cirque du Cyclisme:2007)

From: "John Price" <jprice@2-10.com>
To: "'chuckschmidt@earthlink.net'" <chuckschmidt@earthlink.net>, classicrendezvous@bikelist.org
Subject: RE: [CR]Crank web cracks
Date: Wed, 26 Jun 2002 13:40:13 -0600


Unseated the rider in heavy city traffic ? Wow, hope wasn't severly hurt.

John Price Denver, CO

-----Original Message----- From: Chuck Schmidt [mailto:chuckschmidt@earthlink.net] Sent: Wednesday, June 26, 2002 12:39 PM To: classicrendezvous@bikelist.org Subject: Re: [CR]Crank web cracks

Craig Sandvik wrote:
>
> I always wondered if the classic "campy crack"
> in the web could grow all the way into the arm.
> Now you know:
> http://www-tec.open.ac.uk/materials/mem/mem-ccf4.html

Quote from the web site: "This was a high quality component that had very high load cycles but was in excellent apparent condition until the final fracture that unseated the rider in heavy city traffic."

I think what is interesting here is "had very high load cycles," but with no further detail on just what that refers to.

In 25+ years of daily participation in the bike scene in Southern California I have never seen nor heard about a Campagnolo crank failing in this manner. Doesn't mean it can't happen, just that in my opinion, it is very unlikely.

Just guessing? It sounds like the rider was very, very large.

Chuck Schmidt
SoPas, SoCal