[CR]Urban Legends, by Jobst Brandt


Example: Component Manufacturers:Campagnolo
Date: Mon, 18 Aug 2003 06:04:03 -0700 (PDT)
From: "Neill Currie" <neill1234@yahoo.com>
To: joebz@optonline.net, classicrendezvous@bikelist.org
Subject: [CR]Urban Legends, by Jobst Brandt

Joe wrote: "Jobst says to run the pulling spokes on the outide of the flange because the spoke will be pulled in (straighten) during pedaling and increase clearance. (p. 74).

This rationale is laughable. Firstly a setup that

needs this clearance "trick" has a spacing problem - fix it. Secondly

if you need this "trick" you would jam the derailleur into the spokes upon

coasting! Ouch! Thirdly the spokes in the derailleur "interference" area are generally detentioned. (p. 19 and fig. 8) and its hard to say what the relative movement in and out is. This is especially so because "spoke line" problems on outside spokes can cause a detentioned spoke to tend outward.. (p. 103 and fig. 51)" --------- Very well put. No doubt there is plenty of good advice and information in Jobst's book, there are also a few howlers too, the above is a clear example of faulty logic IMO. In a similar vein, didn't he advocate building wheels "dry"? There's also the advice to tension wheels to the point that the rim starts to deform, then to back off. When I was younger and more impressionable I did this with a rear wheel that had a pretty nice sew-up rim on it. Before I realised there were other, unstated, ramifications to this process, the rim's eyelets started pulling out. Bye bye rim. These days I build wet, and tension to the point that my experience tells me is necessary for my weight and the use of that wheel.

===== Neill Currie, Portland, Me 04102, USA. The Mountain Goat website is at: http://www.geocities.com/neill1234/index.html?1011568933040