Re: [CR]TA 14 BCD chainrings

(Example: History:Norris Lockley)

Date: Mon, 11 Dec 2006 22:38:57 -0600
From: "John Thompson" <JohnThompson@new.rr.com>
To: classicrendezvous@bikelist.org
Subject: Re: [CR]TA 14 BCD chainrings
References: <200612120427.kBC4Rnn7012283@cascade.cs.ubc.ca>
In-Reply-To: <200612120427.kBC4Rnn7012283@cascade.cs.ubc.ca>


Donald Gillies wrote:
> thanx for posting the picture of the 41T ring and comment. I read many
> months ago on this list that the 41T campy ring would cause the chain
> to grind into the chainwheel arms, leaving gouges. Perhaps the TA 41T
> ring is "out of round" because they modified the curvature to fix this
> problem ?? Those french are soooo tricky ...

No, it's still a problem. On my fixie (with SR Royal crank) I filed down the arms so they wouldn't hit the chain. Avocet/Ofmega actually milled the arms to accommodate the 41T ring:

http://www.os2.dhs.org/~john/avocet-crank.jpg

--
John Thompson (john@os2.dhs.org)
Appleton WI USA