Re: [CR] Inner ring for early Campag triple.

(Example: Framebuilding:Tubing:Falck)

Date: Tue, 1 Sep 2009 08:19:13 -0700
From: Jerome & Elizabeth Moos <jerrymoos@sbcglobal.net>
To: <classicrendezvous@bikelist.org>, Alfredo Marcantonio <alfredo.marcantonio@btinternet.com>
In-Reply-To: <E37AC2CD-A846-4176-8D0D-CF821F103609@btinternet.com>
Subject: Re: [CR] Inner ring for early Campag triple.


Don't have any for sale, but for the factory-produced Campy NR triple, the inner ring was 100 BCD and, AFAIK, came in 36T only. There were a few aftermarket rings made, some as small as 31T (Merz), but these are very rare. There were also NR doubles custom drilled by machine shops to different circles. The 102 BCD was used by the larger of the two inner circles on the Ofmega triple, also sold in the US badged as Avocet. The 2 mm difference is unfortunate, as the Ofmega/Avocet rings are easier to find , at least in the US, than the Campy inner, and were available as small as 32T. Kind of like the 2 mm difference between the old Zeus 120mm circle and the Stronglight 122mm. If they could have used the same BCD there would be a whole lot more flexibility in configuring these cranks.

Regards,

Jerry Moos
Big Spring, Texas, USA


--- On Tue, 9/1/09, Alfredo Marcantonio wrote:


> From: Alfredo Marcantonio <alfredo.marcantonio@btinternet.com>

\r?\n> Subject: [CR] Inner ring for early Campag triple.

\r?\n> To: classicrendezvous@bikelist.org

\r?\n> Date: Tuesday, September 1, 2009, 1:50 AM

\r?\n> Hi All

\r?\n>

\r?\n> I am getting my old Hetchins ready for the Eroica. For the

\r?\n> inclines, I am inclined  to fit my nice Campag Triple.

\r?\n>

\r?\n> Trouble is, right now it is presently a nice Campag double.

\r?\n> The inner ring is long gone. I have tracked down a set of

\r?\n> the necessary bolts.

\r?\n>

\r?\n> Does anybody have an inner ring? Or know where or how can I

\r?\n> get one?

\r?\n>

\r?\n> The Chainset appears to be the one shown in Catalogue 17.

\r?\n>

\r?\n> See      http://www.campyonly.com/history/catalogs.html

\r?\n>

\r?\n>

\r?\n> Catalogue 17, Chainset part no. 819

\r?\n>

\r?\n> Inner chainring part 804. This would appear to be available

\r?\n> in 36 teeth only, which would be OK.

\r?\n>

\r?\n> Using the Harris Cycles method of measurement (measure

\r?\n> between fixing bolts on 5 arm cranks and multiply by 1.7)

\r?\n> BCD of the threaded holes represents 60mm x 1.7 = 102

\r?\n>

\r?\n> Although from the CR correspondence archive I note that a

\r?\n> "Bicycle Mechanics" figure of 100 is mentioned.

\r?\n>

\r?\n> ALSO

\r?\n>

\r?\n> I understand I will need to swap my regular Nuovo Record

\r?\n> rear mech for a Rally version. Has any body got one for sale

\r?\n> or swap?

\r?\n>

\r?\n> Thanks

\r?\n>

\r?\n>

\r?\n> Alfredo Marcantonio.Twickenham. Nr London.

\r?\n> England.