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Thread: Gear Ratios

  1. #1
    Newbie Moribund's Avatar
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    Gear Ratios

    I have been riding a converted Kona Lava Dome on a 32/12 ratio into work every day for a few weeks - the journey has one big hill to negotiate which is only just do-able. With an occasional full backpack this hill becomes nigh on impossible.

    I was going to revert to a 13 rear sprocket, which I had used for 2 months or so (I am a relative newcomer). Then I had the bright idea of maybe using the big (44t) chain ring (instead of the middle chain ring) with say a 18t rear sprocket.

    I am hoping this will give me the best of both worlds: the speed on the flat (better than a 32/12) and the ability to climb up that hill.

    Have I got my maths wrong?

  2. #2
    Senior Member ZiP0082's Avatar
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    this tool may help with your math:
    http://software.bareknucklebrigade.c...it.applet.html

    32x12 is 70.3 gear inches
    32x13 is 64.9 gear inches
    44x18 is 64.5 gear inches

  3. #3
    Newbie Moribund's Avatar
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    Cheers. So a 44/18 will basically give me the same performance as 32/13. I think I'm with it now.

  4. #4
    JBD
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    note that your speed will not have "speed on the flat (better than a 32/12)" because your gear inch is lower = less distance covered per pedal rotation; since you're currently dying on the hill, though, the loss of your top speed on the flats is probably worth the ability to conquer your hill.
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    Quote Originally Posted by Moribund View Post
    Cheers. So a 44/18 will basically give me the same performance as 32/13. I think I'm with it now.
    ??
    Quote Originally Posted by dangerscott View Post
    Tarck is that special feeling when you and your lady are riding your bikes and both of you match with your bike and it 'just so happens' your colors work perfectly with hers on accident, and you look over at her and give her that little nod saying "yea thats right we match." Then you go find an alley and she does down on you and she pukes all over your dick and then pees all over the place.
    Thats tarck.

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