• Removed an ancient bottom bracket from an old frame, cleaned and lubed the threads, stuck a new BB in...and this happened. It got in to this point and now no matter which way I thread it's just spinning in place (by hand). I can't remove it and I can't thread it in any more. Safe to say it's all fucked?

    Yes this is plastic

  • Sounds like the plastic BB is fucked but I'd be surprised if the frame BB threads are stripped. Even with a steel BB cartridge it's difficult to strip the frame threads unless you've only just started screwing it in.

    You could smack the spindle with a mallet from the other side. Worth a shot.

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