For some time I noticed that my gears wouldn't change as I set them up. On closer inspection I noticed my bottom bracket not properly attached to the frame. I took it apart and was about to get a new bottom bracket, when I saw that the thread on the frame had wasted.
In the pics you see that the thread on the bottom bracket itself is still pretty good
,
but the thread on the frame is "run down" on the front
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- evidently where I would be pushing into the pedal - whilst the back is still reasonably OK
,
.
I tried as plumber's approach but to little avail.
,
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The bracket has come loose again and is stopped from falling out by the crank attached on the other side.
I know that with some effort there is an option to insert a coil into the thread, but that would mean that the bottom-bracket needed a smaller diameter.
BTW, when I took the bike apart a few years ago, I saw it must have been one of those last British manufactured Raleigh Randonneur diamond shaped steel-frames (1975 or thereabouts).
Anyway, never mind the current rust on the bike, has anyone an idea how I can keep my frame? Or do I have to get a new one?
Thanks for your thoughts.
Stefan