[CR]re: TA triples

(Example: Framebuilding:Brazing Technique)

Date: Mon, 2 Oct 2006 10:14:39 -0400
From: <sachshm@cox.net>
To: classicrendezvous@bikelist.org
Sensitivity: Normal
Subject: [CR]re: TA triples

Thanks, gentlemen, and perhaps I can add some observations about the TA triples from my own experience. To conserve bandwidth, I'm omitting the original posts.

First, let me agree strongly that the TA "cyclotourist" units had design defects. The business of 6 spindly arms supporting a large chainring can be best described as "nuts." My touring bike of the era had such an arrangement, and the middle cog warped backwards substantially, while remaining nicely in plane. For the next set-up, I installed a supplementary ring of machine screws and spacers, at the radius used for one of TA's other styles. I used flat-head machine screws, head outside, and the slight nub of the 1/2" screws that stuck out to the inside was easily filed off. Never had a warp again - but maybe I was getting older and weaker.

On the thicker (18 mm) rings, my sense was that these were marketed for tandems, but still were rare.

harvey sachs
mcLean va usa