first flight bicycles mystery pic on bikerumor

Photo from the collection of Jeff Archer of First Flight Bicycles. If you think you know what this is, post your answer in the ‘comments’ section– the correct answer will be posted there on Tuesday!

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  1. Barrel adjuster adapters for old frames that used to have the flick gearing at the downtube.

    By the way where can I buy them, been looking for it to restore an old frame.

  2. Those look to me like the bottom part of a Shimano thumbsifter. The bracket part. The 4 sets of 3 side by side holes allows for changing the angle/position of the actual shifter which is not included in the picture.

  3. Can’t be for the DT. The holes don’t appear to be big enough for the stud. They look more like some sort of thumb shifter mount for the bar. Just not sure which one.

  4. And they mount m730 XT or DX series shifters on TOP of m730/732 brake levers. Eliminating the need for a separate mount.

    Supposedly making it a more ergonomic position. Since they were discontinued, they probably weren’t too ergonomic : )

  5. They’re IPC C-1 converters for mounting XT thumbshifters to an XT or DX Rapidfire clamp. The bracket was introduced just as Shimano converted from over-the-bar thumb shifters to under-the-bar rapid fire triggers and helped retro grouches keep the thumb shifting while taking advantage of the newer Servo Wave brake levers.

    More info here:

What do you think?