[CR]One and one half inches-a crucial dimension.

(Example: Production Builders:Pogliaghi)

From: <greenjersey@ntlworld.com>
To: <classicrendezvous@bikelist.org>
Date: Sat, 5 Aug 2006 22:54:22 +0100
Subject: [CR]One and one half inches-a crucial dimension.

Just read this and in the unlikely event that it is news to anyone else I thought I would share it. Apparently on a typical early post war English sports bike with fixed gear the measurement from the hub and bracket centre-line to the chainwheel, and of course the cog, should be exactly 1 1/2 inches. That seems remarkably short. Were bottom bracket shells narrower in those days? Ray Green, Brighton, England

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