Smaller chainring, larger rear cog.Gear Ratio Help...- Mtbr.com
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  1. #1
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    Smaller chainring, larger rear cog.Gear Ratio Help...

    So as a general most single speeds are 32 chainring and 17,18,19,20 rear cog..... but I've seen a few here lately that are running much smaller chainrings and larger cog..... what is the reason!!!!!!! is it better and why....

  2. #2
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    Reducing the size of the chainring and/or increasing the size of the rear sprocket = lower overall gearing, obviously.

    And it is a sprocket (designed to mesh with a chain) not a cog (which is designed to mesh with another similar cog, like in a gearbox).
    Another word that gets mis-used now though, like "shock" instead of suspension forks.....

  3. #3
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    Quote Originally Posted by Andy R
    ...

    And it is a sprocket (designed to mesh with a chain) not a cog (which is designed to mesh with another similar cog, like in a gearbox).
    Another word that gets mis-used now though, like "shock" instead of suspension forks.....
    Huh. Never knew this... about the word cog. Oil well, I'm gonna continue to misuse it... but at least I'll know I'm doing so.

    --sParty
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  4. #4
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    people are getting weaker?

  5. #5
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    Quote Originally Posted by ISuckAtRiding
    people are getting weaker?
    Won't speak for everybody, but I most certainly am.

    --sParty
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  6. #6
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    Quote Originally Posted by hdkiwi
    So as a general most single speeds are 32 chainring and 17,18,19,20 rear cog..... but I've seen a few here lately that are running much smaller chainrings and larger cog..... what is the reason!!!!!!! is it better and why....
    I have a 28/19 setup (1.47 ratio). Why so light you ask? I live in an area where there are lots of steep climbs and technical areas. Anything higher and I burn out instantly on the climb or have to get off for all of them.
    I don't mind spinning out on the flats because there aren't any.
    When it comes to down, there isn't pedaling anyway because we can pick up so much speed or we are on the brakes for the tech-bits.
    For me it's all about making the climbs.
    this space left intentionally blank

  7. #7
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    i wonder if he means smaller in the front and smaller in the rear? Like a microdrive setup?
    If so, it gives you a little more ground clearance, and it's lighter. However, it wears everything out faster.

  8. #8
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    Quote Originally Posted by Andy R
    Reducing the size of the chainring and/or increasing the size of the rear sprocket = lower overall gearing, obviously.

    And it is a sprocket (designed to mesh with a chain) not a cog (which is designed to mesh with another similar cog, like in a gearbox).
    Another word that gets mis-used now though, like "shock" instead of suspension forks.....
    But can you really call a Lefty a Suspension "FORK"?

    Seriously, I know some guys have dropped down to a 24t front w/ a 12t rear. (Micro drive) The ratio is still pretty much the same but they shaved weight by running this set up due to the parts being smaller.

  9. #9
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    Pretty much the same here, but 32:20 on a 26" wheel (41.6").

    All up or down and mostly pretty technical - it's all about making the climbs for me, too.

  10. #10
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    I run a 32/15 to race on and a 32/17 when I go to the mtns. I feel that I am getting stronger. Easier gears are just not fun. It is ALL about speed!
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  11. #11
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    nm

  12. #12
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    Quote Originally Posted by forkboy
    nm
    you edited your post, but i read it before you did, and you said "dampener". You mean like a squirt bottle?
    Or did you mean damper, like a rebount/compression damper?






  13. #13
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    Quote Originally Posted by ISuckAtRiding
    Exactly! I had a couple other errors in there that I was going to get called on...

    But according to dictionary.com, the alternate meaning of Dampen is to dull or deaden; depress, so a dampener could be either a deadener or a moistener.

    Just depends which version of English you are using.

  14. #14
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    Quote Originally Posted by ISuckAtRiding
    you edited your post, but i read it before you did, and you said "dampener". You mean like a squirt bottle?
    Or did you mean damper, like a rebount/compression damper?





    Heh heh... you said rebount.

    --sParty

    P.S. Sorry to be posting so many lame replies last couple of days but I'm at home... sick... can't ride... bored to tears... anyway you guys are my victims.
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  15. #15
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    Quote Originally Posted by MichaelW
    I run a 32/15 to race on and a 32/17 when I go to the mtns. I feel that I am getting stronger. Easier gears are just not fun. It is ALL about speed!

    Agreed. I guess I'm just used to mashing, but I tried a 32x18 last weekend (change from usual 32x16) on a course with some lite climbing and hated it. Spinning fast up the hill feels like riding a geared bike.

  16. #16
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    Quote Originally Posted by Sparticus
    Heh heh... you said rebount.

    --sParty

    P.S. Sorry to be posting so many lame replies last couple of days but I'm at home... sick... can't ride... bored to tears... anyway you guys are my victims.
    you know they stopped using Codine for coughs and colds years ago, right?

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