Help with gear ratios............ Please

topic posted Sat, February 7, 2009 - 5:11 AM by  mike
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Hey Ho riders, problem... I used to run 49/ 17 gear ratio on a Flyer. Have recently purchased a Lemonde Filmore. It comes with a 44 up the front and rather than buy a new Chainring I was gone drop the size of my sprocket to try and find something that was closer to 49/ 17... I have had a look on ratio calculating sites however i find it all a little confusing... can anyone help with a straightforward answer???? Easynow x
posted by:
mike
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  • Re: Help with gear ratios............ Please

    Sat, February 7, 2009 - 7:27 AM
    I don't think it gets any more straightforward than this:

    sheldonbrown.com/gears/

    44 is pretty standard for a production street fixie like the fillmo' .
    49/17 has a gear inch rate of 77- not too bad for street, if you have the legs and experience.

    a 44/15 will give you a slightly higher ratio of 78 gear inches
    a 44/16 will give you 74, which is slightly lower.

    I'd lean towards the lower ratio, especially if you are in hilly areas. If you are in flatsville, then go bigger.
    • Re: Help with gear ratios............ Please

      Sat, June 20, 2009 - 3:11 PM
      Using the means of division..

      Divide your chainring teeth by your cog teeth..

      (this is BMX gearing)

      *calculates*

      2.75 is the result of a 44/16 setup, and is ideal for most..

      Save for the fact that it's an even/even setup..

      Which is a no-no on the street!

      (your tire wears out in the same place - not evenly)

      So "gear up" a tooth in front, or lose one in the rear.

      My current would be a 48/17 (2.82)

      (2.8 is ideal for my surroundings)

      Keep the odd/even in mind and try a few cogs and rings out..

      And you'll be fine.

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