If the joint popped when cold-setting, it wasn't brazed correctly and it was fortuitous that you unearthed the defect in the shop--not that a chainstay bridge is anywhere near as critical as a brake bridge.
Steve Barner, Bolton, Vermont
> Date: Wed, 21 Jul 2004 19:13:39 +0000
> From: gpvb1@comcast.net
> To: classicrendezvous@bikelist.org
> Subject: Re: [CR]Frame integrity
>
> I tend to agree that, depending on the gauge of the tubes, four or five mm
is relatively low-risk if done carefully, (I had a frame pop a chainstay
bridge once when doing that operation years ago, though - repair and repaint
time!). Cold-setting from 120 to 130 or 135 is potentially a lot of
yielding/bending of some pretty thin
>
> Greg Parker
> chief nerd
> Bicycle Classics
> Dexter, MI