Spindle Size for 1992 Trek 8900- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Jul 2020

    Spindle Size for 1992 Trek 8900

    Hi there,

    Does someone have the factory spindle size for a 92 Trek 8900?
    I have a 113mm on it now but the shifting isn't as smooth as I am hoping so want to check if I missed something.


  2. #2
    Hybrid Leftys aren't real Moderator
    Reputation: MendonCycleSmith's Avatar
    Join Date
    Feb 2005
    It's not really based on the bike, so much as the cranks.

    113 should be in the right range "for the era", but the general rule of thumb (if shooting from the hip) would be having the chainrings as reasonably close as possible to the chain stay without flex causing it to rub the frame.

    I'd use that guideline to help, if you don't truly know the correct spindle length, for the crank used, to get whatever the "proper" chainline is that the crank maker built them for.

    BB spindle length shouldn't terribly impact shifting "smoothness" though, it'll show itself with rings rubbing on frame, or rings too far away that certain combinations don't work well or at all.
    Cannondale Lefty and HeadShock servicing, wheel building, etc...


  3. #3
    mtbr member
    Join Date
    Jul 2020
    thanks a lot!

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