[CR] Cottered Bottom Brackets Have My Head Spinning

Example: Production Builders:Cinelli

From: Sean Flores <seaneee175@gmail.com>
To: <classicrendezvous@bikelist.org>
Date: Sun, 19 Jul 2009 13:12:20 -0700
Subject: [CR] Cottered Bottom Brackets Have My Head Spinning

I'm in the process of building up a 1950's Freddie Grubb frameset and would like to use era appropriate cottered cranks. This will be built up as a 1x5, with a single, non gear-case chainwheel in the front. I'm deciding between a williams 5 pin or a Stronglight 3 arm competition cottered chainset.

I've been looking at both Sutherlands, the Bikelist Archives and the chart on Peter Underwood's Classic Lightweights site. I can't make heads or tails of the archive posts and the chart on Classic Lightweights has some major discrepancies when compared to the one in Sutherland's.

So my question is, what is the correct spindle length for a 1x5, non gear-case setup? I'm trying to keep it easy by looking at TDC and Bayliss bottom brackets as it seems those are the most readily available. However, I would love any input (as well as a spare bottom bracket anyone may have lying around).

Thanks All.

Sean Flores
San Francisco, CA