[CR]Campy Triple BB <=> Phil Wood Triple BB ?

(Example: Books:Ron Kitching)

From: Donald Gillies <gillies@cs.ubc.ca>
Date: Wed, 12 May 2004 12:52:59 -0700 (PDT)
To: classicrendezvous@bikelist.org
cc: internet-bob@bikelist.org
Subject: [CR]Campy Triple BB <=> Phil Wood Triple BB ?

Hi, i've searched the bikelist archives and http://www.bicycleclassics.com and talked to phil wood with no definitive answer to this question.

What's the closest BSC match to a 1974 campy triple bottom bracket, in the phil wood product line ?? Phil Wood & company isn't sure. They say, "pick the closest traditional BB that isn't campagnolo specific. our adjustable cups should do the rest."

Supposedly, the stock spindle of the old campy triple was 117 mm. however, campy was a little bit lazy in printing catalogue #17, and they used the same diagrams for the 112 double BB's and 117 triple BB's. Needless to say, the offsets on the 117mm triple BB add up to 112 mm. (http://www.campyonly.com/history/1974/triples.pdf).

I know that campy used thicker cups & lockrings by maybe 1 mm, so maybe a campy triple bottom brack is actually 117 R+6 ( = 112 + 2 mm for lockrings + an extra offset of 3mm)

In that case, is a phil wood 119 R+4 the preferred bottom bracket? That would produce these distances from centerline of BB shell :

left right phil wood : 57.5 61.5 campy 3x ?? 55.5 61.5 are these estimates correct?

???

- Don Gillies
San Diego, CA