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  1. #1
    mtbr member
    Reputation: dobre shunka's Avatar
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    Question for On One Fatty owners

    Building up my Fatty to run a double crank I hit an issue.

    Iíve got a FSA Alpha drive crank with a 36 outer chainring mounted to a FSA Platinum 100 x148 BB. If I fully tighten the crank down, the outer chaining will hit the chainstay so I guess I need a longer spindle than 148 mm.

    Before I go buy another crank and BB, what setup is everyone else using to run a double crank?

  2. #2
    addicted to chunk
    Reputation: Shark's Avatar
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    Need a spacer behind the BB cup on that side maybe??
    Riding.....

  3. #3
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    It was posted in the On-One Frame thread that you need a 32 (or 34?) tooth or smaller to work with the typical setup. The spacer idea might work too. Let us know if you figure it out. You might check that thread for more ideas. Maybe the spacer idea is in there too. I can't remember.

  4. #4
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    A 32 ring clears the stay by about a 1 mm. I need about 3.5 to 4 mm to get 36 to work so I may try a spacer and see what happens.

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