[CR]Question about Super Rec Chainrings

Example: Framebuilding:Restoration

Date: Sat, 25 Aug 2007 14:39:31 -0700 (PDT)
From: Tom Dalton <tom_s_dalton@yahoo.com>
To: Classic Rendezvous <classicrendezvous@bikelist.org>
Subject: [CR]Question about Super Rec Chainrings

The oldest 144 BCD Record rings have no pin to keep the chain from falling behind the arm. I had thought this pin, was added before SR was introduced, but looking at Calatlogs 17 and 17A, I see SR rings without the pin. Were they really made this way, or did SR rings actually have the pin from day one? I have an old "Patent" logo SR outer, and it has a pin. This does not preclude the possibility that earlier pataent logo SR rings had no pin. So, do any of you have a pin-less SR outer ring? Just wondering.

To be more specific, if I'm assembling a 1977 SR group, pin or no pin?

Tom Dalton Bethlehem PA USA

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