[CR]RE:Was: W Cut Tooth Mechanism/Now: Move to proprietary drive trains?

(Example: Racing:Jacques Boyer)

Date: Thu, 10 Aug 2006 07:29:56 -0700 (PDT)
From: "Don Wilson" <dcwilson3@yahoo.com>
To: Classic Rendezvous <classicrendezvous@bikelist.org>
In-Reply-To: <BAY109-F19CC890310AAAB351EA87A9C4A0@phx.gbl>
Subject: [CR]RE:Was: W Cut Tooth Mechanism/Now: Move to proprietary drive trains?

Could the W Cut in any way limit a bicyclist's ability to mix and match chain rings and derailleurs from different manufacturers; i.e., was it part of an attempt to create proprietary drive trains? Or was it solely an attempt to improve the breed?

Don Wilson
Los Olivos, CA USA


--- "R.S. Broderick" wrote:


> Don,
>
> I do not feel qualified to comment on the current
> market status and
> collectibility factor of this particular
> Specialized. That said, it should
> be noted that there are some gross misstatements of
> fact made within the
> auction listing text itself although these are
> likely begot of ignorance in
> conjunction with a desire by the commercial reseller
> to over hype the
> relative value of this bike rather than being the
> result of any malicious
> intent.
>
> However, your second question provides a perfect
> opportunity to underscore
> the potential value of having at least a few of the
> earlier Shimano catalogs
> currently available for public scrutiny inasmuch as
> one now has a few more
> tools at their disposal should they care to take the
> initiative to do a bit
> of research on their own.
>
> The "W" cut tooth mechanism actually predates the
> full blown Shimano Aero
> Dynamics concept and was available on both Dura-Ace
> EX and 600 EX series
> chain rings (...with a further Super "W" cut version
> requiring a specialized
> front derailleur being intended for BMX
> applications). Basically, Shimano
> shortened the height of two adjacent teeth at two
> very specific points on
> their outer chain rings in an effort to optimize
> shifting one's chain from
> said ring onto the smaller chain ring. The
> principle here being that under
> heavy load conditions such as when one is standing
> on their pedals out of
> the saddle while climbing, the modified chain ring
> tooth profile at specific
> shift points reduces the amount of stress inflicted
> on the outer chain ring,
> the chain itself, and the front derailleur to the
> extent that less effort is
> required to lift the chain from the big ring in
> order to drop it onto your
> smaller chain ring, thereby facilitating smoother
> shifting under these
> conditions.
>
> You can read all about it using the following
> convenient links:
>
> http://www.wooljersey.com/gallery/main.php?g2_itemId=158973
>
> http://www.wooljersey.com/gallery/main.php?g2_itemId=142855
>
> http://www.wooljersey.com/gallery/main.php?g2_itemId=142873
>
> Robert "somewhat Shima-Know, ya know" Broderick
> ...the "Frozen Flatlands" of South Dakota
>
> -----------------------------------------------------------------------------------
>
> >From: Don Wilson <dcwilson3@yahoo.com>
> >To: Classic Rendezvous
> <classicrendezvous@bikelist.org>
> >Subject: [CR]Ebay Specialized Aero Prototype
> >Date: Wed, 9 Aug 2006 23:03:26 -0700 (PDT)
> >
> >Aero. Collectibility ramping up?
> >What does "WCut" stand for on chain ring?
> >280014555729
> >Don Wilson
> >Los Olivos, CA USA
> >
>
>
> _______________________________________________
> Classicrendezvous mailing list
> Classicrendezvous@bikelist.org
> http://www.bikelist.org/mailman/listinfo/classicrendezvous
>

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