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  1. #1
    Senior Member bumpalong's Avatar
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    Best cog size for a 49t chainwheel

    Excuse the ignorance, but I just picked up a Suntour Superbe Pro crankset with a 49 tooth Sugino 75 chain ring with which I plan to convert an 86 Peugeot Triathlon (PSV).

    What would you suggest is the best cog size for me to use in a relatively flat city (Boston). I'll need to clear a few hills, but I hate spinning crazily when I'm on a nice clear bikepath. Does 17t sound right? Should I go lower?

  2. #2
    The Stark Fist of Reality Scrodzilla's Avatar
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    Personally, I would go 17 or 18. It's relatively flat where I live and I find 48/17 to be an ovverall perfect ratio for the riding I do.

  3. #3
    Ride heavy metal. Maddox's Avatar
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    I'm with Scrod. 17 or 18 would be most comfortable, and best for all-purpose fixed riding. If you're going to use it to race, you might go 15/16, but I think 17/18 would be far better for a street bike.

  4. #4
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    17t sounds about right

  5. #5
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    17 if you are in fit shape, 16 if you ride more than a few times a week and like to hang around 22mph when cruising. 18 if those hills you have to clear are something you have to ride often.

    I ride a 48/16, 700x23c, 170mm crank and fits my rider perfectly for mostly flat, occasional hill.

  6. #6
    Fueled by Tigers Blood avner's Avatar
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    I run 48/17 and its great. My commute has a few decent hills and a few decent downhills. I spin at about 25MPH on straights/slight downs and never have a problem with spinning out. I can handle most "hills" without standing and pedalling. i think its my ideal ratio for now. Probably going to try a 19t out.
    Quote Originally Posted by Leukybear View Post
    Genius.
    Quote Originally Posted by xkillemallx16 View Post
    Save your dignity and go back to hopping curbs on your langster.
    Quote Originally Posted by jdgesus View Post
    only thing cars are good for is hitting me

  7. #7
    pjb
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    48/17 is the cat's meow. My favorite for sure.

  8. #8
    dsh
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    My carpet fiber fixie is 49x18.

  9. #9
    Fueled by Tigers Blood avner's Avatar
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    Quote Originally Posted by dsh View Post
    My carpet fiber fixie is 49x18.
    Is it the shag model?
    Quote Originally Posted by Leukybear View Post
    Genius.
    Quote Originally Posted by xkillemallx16 View Post
    Save your dignity and go back to hopping curbs on your langster.
    Quote Originally Posted by jdgesus View Post
    only thing cars are good for is hitting me

  10. #10
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    I'm in Boston too, and I ride 48/18 every day. In my opinion, it's a good ratio for the area, but it might be too high for someone who rides only occasionally or someone who wants to cruise a little easier on flat sections.

  11. #11
    Senior Member ColonelJLloyd's Avatar
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    17t is the place to start. You'll figure it out from there.

  12. #12
    Senior Member bumpalong's Avatar
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    Excellent. I'll start with 17 and see where that gets me. Many thanks.

  13. #13
    Senior Member vw addict's Avatar
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    saw it now, nevermind......
    Last edited by vw addict; 11-16-10 at 12:37 PM. Reason: blind

  14. #14
    GONE~
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    I'd get a 18t, heck, even a 19t. I like to spin, that is all.

  15. #15
    . xavier853's Avatar
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    16t

    done

  16. #16
    Elitist carleton's Avatar
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    It depends on two things:



    and



    I would start with an 18t and go from there.

  17. #17
    The Stark Fist of Reality Scrodzilla's Avatar
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    Where did you get that pic of my legs???

  18. #18
    モㄥ工匕モ 爪モ爪乃モ尺 evilcryalotmore's Avatar
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    49/49.

  19. #19
    Ths Hipstr Kills Masheenz cc700's Avatar
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    48/19 in seattle is barely manageable. then again, if you need to clear a few 'hills' in boston, we in seattle might call them 'pebbles.' 17 is probably fine.

  20. #20
    Elitist carleton's Avatar
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    Quote Originally Posted by Scrodzilla View Post
    Where did you get that pic of my legs???
    :blushes:

    I follow you home from school sometimes.

  21. #21
    The Stark Fist of Reality Scrodzilla's Avatar
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    I knew that was you!

  22. #22
    Elitist carleton's Avatar
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  23. #23
    Senior Member vw addict's Avatar
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    Quote Originally Posted by cc700 View Post
    48/19 in seattle is barely manageable. then again, if you need to clear a few 'hills' in boston, we in seattle might call them 'pebbles.' 17 is probably fine.
    oh how you make us east coasters blush, I'll take you up some hills, iffin you are man enough.

  24. #24
    Ths Hipstr Kills Masheenz cc700's Avatar
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    not on 49/17 you won't.

    i'm not saying there aren't hills out east, i'm saying you didn't build your cities on them.

  25. #25
    GONE~
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    I dig cc700's new links, very original.

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