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  1. #1
    Member JesusGarcia's Avatar
    Join Date
    Apr 2007
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    SF bay area
    My Bikes
    Vitus 979 Cilo, Cannondale CAAD9, Specialized Rockhopper, Trek 760
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    Another BB question...

    Hello... newbie here... I'm upgrading my vintage Vitus Cilo (1989) with a new-old-stock bottom bracket. Currently, it has a Specialized bb w/ Italian threading 36 x 24F, 70mm hub width, 110mm (I think) spindle length. I want to replace it with a Shimano UN10, 36 x 24T, 70mm hub, 115mm spindle to ease up on the chain angle when using high gear (39 chainring - 13t sprocket 7-speed and 130mm hub spacing from previous 126mm)... Firstly, is the threading 24F and 24T the same? Secondly, is 115mm spindle length too much. Thank you in advance...

  2. #2
    * vpiuva's Avatar
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    Jan 2007
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    The threading should be the same. Chainline - guessing here that you will kick your chainline out 3-4mm, just don't know the symmetry of the Specialized vs. Shimano to give you a precise answer.

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