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  1. #1
    Junior Member
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    Aug 2007
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    Fixed Gear Chainline / BB Spindle Length

    I am hoping to use an older Dura-Ace Crankset for a fixed gear set-up (on a track bike.)

    Budget fix for the first little and will upgrade parts as I have $.

    Since the track hub and cog in the back will give a 42mm chainline, I will most likely need to run the chainring on the inside (of the double crank.)

    I believe the spindle length for this crank set is a 109 for a 43mm chainline (on a road bike set-up.)

    does anyone know where this would put the chainline of the inner chainring and the outer chainring? (assuming that the 43 is the center of the two double chainrings?)

    If I wanted to run on the outer chainring, could i just get a smaller spindle length BB (107, 105?)

    Will I run into problems with putting this crankset on a smaller BB?

    I know the correct answer is to go to my LBS but I would just as soon build this on my own and learn some lessons...

    Thoughts?

  2. #2
    A little North of Hell
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    Mar 2006
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    How old dura ace?

    Quote Originally Posted by sundersledge View Post
    I am hoping to use an older Dura-Ace Crankset.
    I believe the spindle length for this crank set is a 109 for a 43mm chainline (on a road bike set-up.)
    FC-7700 uses a 109.5 octalink BB
    FC-7410 uses a square taper 103mm BB
    http://www.sheldonbrown.com/chainline.html#standards
    [SIGPIC][/SIGPIC]
    XXXI

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