It wasn't my bike, I'm just a lurker on the machine shop site, the poster, Frank Ford, is a Luthier, and no fool around machine tools. Apparently the bike belonged to his business partner, and had a sudden failure after 20 years on the road. I'm mostly just curious about the process, which apparently is well developed, and understood in the bike building world.
Judging by the length of the head tube, the guy had to be pretty tall (read heavy). And I'm the frame saw a few decent sized cracks and potholes. So I'd say the bond just failed due to fatigue. Not suprising really.
