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  1. #1
    Junior Member
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    Shimano 105 FC-1055 cranks

    Just wondering if anyones running these setup as fixed. For a standard double chainline (46mm outer ring) they use a 113mm bottom bracket. My question is... Anyone running these with a 107mm bottom bracket and how close is it to 42mm? Cheers.

  2. #2
    aka mattio queerpunk's Avatar
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    so: if the outer ring is at 46mm with a 113 bottom bracket, you can calculate where it will be with a 107mm bottom bracket. here's how:

    subtract 107 from 113 to get the difference. the answer is 6.

    divide 6 in half. you get 3. three millimeters. the reason you divide it in half is because you are taking length off from both sides of the spindle.

    next, subtract 3 from 46. the answer is 43 millimeters.

    next, subtract 42 from 43, and the answer is 1 millimeter.

    so: how close is it to 42? 1 millimeter.
    the hipster myth.

    i practice vagabondery.

  3. #3
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    Cheers mate thats what I was thinking but its always nice to have some input. Think it might work out for me.

  4. #4
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    I run 105 cranks. With the 113mm spindle. Put the chainring on the inside and all is good.

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