You are reading a single comment by @mashton and its replies. Click here to read the full conversation.
  • I have an old Carlton Corsair with "in between" chain rings and a five speed block.

    The idea is that you change chainring and sprocket sort of in turn* to work up through ten gears. It's a stupid idea and doesn't really work. But, it exists.

    * 1S, 1B, 2S, 2B ... 5S, 5B.

About

Avatar for mashton @mashton started