[CR]On BB sleeves & materials

(Example: Framebuilders:Masi)

Date: Sat, 15 Sep 2007 22:35:52 -0400
From: "Harvey Sachs" <hmsachs@verizon.net>
To: Classic Rendezvous <classicrendezvous@bikelist.org>, captbike <captbike@sheldonbrown.com>
Subject: [CR]On BB sleeves & materials

Sheldon Brown wrote:

The inside of a bicycle frame is a surprisingly dirty place, even if you have a closed-top seatpost. There are random bits of left-over brazing flux, rust flakes, paint chips and filings floating around in there.

A bottom bracket sleeve keeps these things from contaminating the bearings.

No reputable mechanic would assemble a cup/cone bottom bracket without a sleeve of some sort. That would be totally mono-buttocked.

Back in the day, I used to make 'em out of beer can stock...

+++++++++++++++++++++++++ I have no idea how many black plastic Kodak 35 mm cases became BB sleeves at my hands. Slice off the bottom (and sometimes the top ring) and they fitted right well... An unanticipated loss in the race to digital. I may not have but 20 or so spares left...

harvey sachs
mcLean va