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Thread: Gears

  1. #1
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    Gears

    Hey guys.... I have a lemond Zurich stock ... How to I find out what gear ratios I have? And as a newbie can someone explain pro/cons of various set ups? Thanks
    Last edited by Ecavalino; 04-06-11 at 11:24 PM.

  2. #2
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    There's a wealth of information online. A good place to learn is the late Sheldon Brown's site: http://sheldonbrown.com/gearing/index.html
    Jeff Wills

    All my bikes.

  3. #3
    Senior Member dstrong's Avatar
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    First you need to know how many teeth are on the front chainrings and the rear cogset. Typical fronts include 53/39, 50/34 or in a triple, 52/42/30. Yours could be different. The tooth count is usually stamped on the ring but if you can't find it, count 'em.

    For the cogset, again, each gof should have a stamp with the tooth count or you can count 'em.

    Once you have all that, google "sheldon Brown gears" and you'll find a link to his gear ratio calculator. After putting in the info for your chainring and cogset, it'll calculate ratios, gear inches and MPH given a certain RPM.

    Oh yeah...you'll need to know your wheel diameter (likely 700) and your crank arm length.

    Have fun!

    2014 Specialized RoubaixOOOOOO 2003 Interloc ImpalaOOOOOO 2007 ParkPre Image C6 (RIP)


  4. #4
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    Jeff... Brilliant thanks .... Great 101 reading

  5. #5
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    Hey perfect info.... Time to hang the bike and look for the numbers!

  6. #6
    Constant tinkerer FastJake's Avatar
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    This article may be helpful in understanding gear theory: http://sheldonbrown.com/gear-theory.html

    Counting the teeth on your gears and plugging those numbers into an online gear calculator such as this one http://www.gear-calculator.com/# can give you a lot of information about your setup.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  7. #7
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    Thanks .... Sheldon Brown site seems to be very popular reference ..., thanks

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