Date: Sun, 24 Feb 2008 18:59:38 -0600 From: Mark Stonich <mark@bikesmithdesign.com> To: classicrendezvous@bikelist.org Subject: Re: [CR] Nervar Crank Questions
At 2/24/2008 07:29 PM +0000, gpvb1@comcast.net wrote:
>Mark:
>
>Are you sure that 1970s spindle was ISO? ISO spindles didn't even
>exist back then, did they?
I should have said it was Campi compatible. I've been working on the
assumption that "ISO" was what they started calling "Campi
compatible" after 1993.
>If you were running that GS crankset on an ISO spindle, that would
>be an incorrect combination. Campy didn't switch from JIS to ISO until 1993.
I was not aware Campi ever used a JIS spindle. But my newest Campi spindles and cranks are 1977.
Mark Stonich; BikeSmith Design & Fabrication 5349 Elliot Ave S. - Minneapolis. MN 55417 Ph. (612) 824-2372 http://bikesmithdesign.com http://mnhpva.org
Mark (and list):
I think there is (still) an awful lot of confusion out there regarding Campagnolo BBs. Prior to 1993, Campagnolo used JIS-tapered spindles, just like virtually everyone else did (and still does, if they haven't abandoned square-taper BBs entirely). As far as I know, Campagnolo is the only major manufacturer that switched to ISO spindles, so you basically have 'everyone else' tapers, and you have Campagnolo tapers on 1993-present Campagnolo.
So, on vintage square-taper-BB cranksets that are pre-1993 (which means everything that is CR list-compliant), all one really needs to worry about 99 percent of the time when replacing an entire BB is threading, spindle length, and spindle offset. Period. The only exception to this that I am aware of is the fairly rare three-degree-taper Sugino Maxy and SR Silstar stuff. YAMMV, though, and objects in mirror are often more tapered than they appear....
Greg 'spindly' Parker
Ann Arbor, Michigan
http://www.bicycleclassics.com