Join Date: Jan 2006
Location: Aberdeen, WA
Bikes: Owner built touring & tandem
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Thanks. I hadn't thought about trying to spread the frame to reinsert the top tube. I liked all of your ideas. I am not sure that it is rusting, but some strange things are going on. I built the frame about 15 years ago or so. It is a Tange Prestige tube set, silver brazed. I refit it two years ago into a touring bike. I replaced the chain & seat stays. When I opened up everything there was a bunch of brown chips & dust collecting in the bottom bracket. I couldn't tell what it was. I think that I checked to see if it was magnetic, is rust attracted to a magnet? but it was not. I knocked out as much as I could. But it would reappear every time I took out the bottom bracket. I can't remember if I put something in the tubes as a rust inhibitor that could be flaking off, but maybe. On to the next weird problem. I had the bike down to bare steel while refitting it. One night I left it in the bike clamp with a shop rag wrapped around it. In the morning that spot, a 5" section of the top tube was rusted and had several pits. I sanded it off. It rusted. I etched it, cleaned it, put on WD40. It rusted. Strange. Finally I took it to powder coating. I came back with the pits showing, but not too bad. However, in the course of two years the section under the powder coat is getting worse. it looks like bubbles or ? i am getting ready to pull off all of the parts, and will see what in the bottom bracket. Oh, that reminds me. The last time I took out the bottom bracket, which is a Phil Wood with a silver colored shell. The shell was pitted!!! I think my poor frame is dissolving!
Anyway, I up for replacing the top tube, and if that doesn't cut it, make a new frame.