Re: [CR]Crank web cracks

(Example: Framebuilders:Doug Fattic)

Date: Wed, 26 Jun 2002 11:39:28 -0700
From: "Chuck Schmidt" <chuckschmidt@earthlink.net>
To: classicrendezvous@bikelist.org
Subject: Re: [CR]Crank web cracks
References: <20020626174421.6567.qmail@web21405.mail.yahoo.com>


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