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  1. #1
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    New question here. KM Double Drivetrain?

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    I want to do this, can someone tell me what size Whirly I need for the KM BB shell?
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  2. #2
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    you'll need the 68/73mm spindle

  3. #3
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    Cool Thanks !
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  4. #4
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    Then I suppose I get the Single Speed version and add my 31T Ring? I cant seem to find an image of the inside of the Single Speed Drive side !?!?
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  5. #5
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    you'll need to add longer chainring bolts as well as the 31t ring, then you'll have an awesome dingle setup.

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