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  1. #1
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    Angle of attack...

    When you design a tadpole how do you choose the angle of the post the crank is mounted on? Are there some sites that explain these things?

  2. #2
    Senior Member BlazingPedals's Avatar
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    I'd aim for about 65 degrees from the line described by the power side of the chain. That's not a hard and fast number, there's wiggle room in either direction. Within reason, a shallower angle will let you shift a greater range of chainrings, and a steeper angle... won't.

    If in doubt, measure the angle on some uprights.

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