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  1. #1
    MyBikeStand.com
    Reputation: WingNutt's Avatar
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    Have a 9 tooth driver....what to run on front?

    ok I am needing some help.....I have a new set of hubs with a 9 tooth driver...just not sure what to run on the front...I know usually its 2:1 ratio but would a 22/9 be too hard to pedal or step it down to a 20 in front....on 180s

  2. #2
    mtbr member
    Reputation: cmc4130's Avatar
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    Quote Originally Posted by WingNutt
    ok I am needing some help.....I have a new set of hubs with a 9 tooth driver...just not sure what to run on the front...I know usually its 2:1 ratio but would a 22/9 be too hard to pedal or step it down to a 20 in front....on 180s
    2:1 ratio is more of an xc guideline for SS.
    in DJ/Park/Street, you would want more like 2.1 : 1 ; 2.2 : 1, maybe 2.3 : 1.

    i would recommend a 20t for the front. (assuming we're talking 26" wheels).

  3. #3
    dirt rules
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    I prefer a somewhat steep gear, about 60 gear inches is the sweet spot for me.
    http://software.bareknucklebrigade.c...it.applet.html
    A 20/9 with 26x2.35 tires would be 58.7
    20T will require a special crank, or a splined (no bolt) sprocket....

  4. #4
    MyBikeStand.com
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    Thanks guys, looks like I may need to just pony up and get the 11 tooth driver. I figured the 20/9 would be the ticket but now I am looking at new cranks too if I go that route. I found a 22 I could get on my cranks. But from the software SittingDuck supplied either a 24 or 25 / 11 would work much better.

    Note these are prototype hubs I am doing a review on for 26" wheels
    mybikestand.com

  5. #5
    dirt rules
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    You might take a look at this calculator as well: http://www.ridemonkey.com/forums/sho...ainstay+length

    It will give you exact chainstay lengths and gear ratio dependent upon how many links of chain you will use.

    You might avoid having to use a half-link!

  6. #6
    Gold it's the new Pink!
    Reputation: Crimson's Avatar
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    I am running a 25t front with a 10 tooth driver and 180 mm cranks. I love it and no problems at all.

    Stephen

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