I've only encountered this once and had no idea about metric gauge tubing then. A customer had bought a frame which was a repainted Peugeot or so he was told and couldn't figure out why some of the parts from his other bike, also a Peugeot, wouldn't work. Everything else was no sweat but the FD was a quandry, but eventually I just cut a piece of rubber the match the clamp and installed it. It worked fine. So what's the story with the french gauge tubing, when and why was it used? enjoy, Brandon"monkeyman"Ives
"Nobody can do everything, but if everybody did something everything would get done." Gil Scott-Heron