Date: Sun, 24 Oct 2004 13:48:41 -0500 From: Ken Wehrenberg <wnwires@htc.net> To: classicrendezvous@bikelist.org Cc: RDF1249@aol.com Subject: Re: [CR]Campagnolo SR 39T chainring?
I dunno, Bob, but the material thicknesses near the holes on this chainring are incredibly tiny. I have a Stonglight-made 41T to the Campy NR bolt circle diameter and it's holes are not this close in to the teeth.
Ken Wehrenberg, Hermann, MO -- the thickness here is thinner than my custom-made 94BCD 29T ring
Hi Ken (and all):
It is absolutely, with a 100% certainty-level, "dead-cert," physically impossible for anything smaller than 41 teeth to fit on a 144 BCD double-chainring arm. It is even recommended to chamfer the arms of the spider to properly clear some chains with a 41. Campagnolo did this OEM on late 144 Record arms sold with 41s - I just sold an NOS 1983 SR crankset like this recently.
This guy on eBay is full of it. He has a 135 BCD 'ring.
Cheers,
Greg Parker
Ann Arbor, Michigan