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Thread: 6er, 9er Ratio

  1. #1
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    6er, 9er Ratio

    My current ride is 26er SS 34:16 ratio. I am about to build a SS 29er. Should I drop my ratio to keep the gear inches the same? I would go from 55 G.I. (26er) to 57 G.I. (29er).
    Would the +2 gear inches matter considering you can roll over more terrain with a 29er?

  2. #2
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    This page is a big help. I would want to start with an equivalent of a familiar ratio

    EDIT: added link
    Last edited by boomn; 09-15-2009 at 03:54 PM.

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    I'm sure many will disagree, but I would re-gear with a slightly smaller ratio. Say 52 gear inches. It takes more effort to spin up the bigger wheels, and the power you can generate is transferred to the ground via a longer moment arm... so a ratio that generates proportionately more torque would be a good thing.

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    Haha, i forgot the link in my first post. Here it is

  5. #5
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    Quote Originally Posted by sunset1123
    I'm sure many will disagree, but I would re-gear with a slightly smaller ratio. Say 52 gear inches. It takes more effort to spin up the bigger wheels, and the power you can generate is transferred to the ground via a longer moment arm... so a ratio that generates proportionately more torque would be a good thing.
    You do have a good point. Taller gears do work better with 29" vs 26" wheels. My original suggestion was because a harder gear can be a frustrating adjustment for some trails, and I wouldn't want that to get in the way of enjoying the new bike experience

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