Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 35

Thread: Tooth Count?

  1. #1
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Tooth Count?

    What chainring tooth count do you have on your single speed or fixed gear?

    Why do you like that number?

  2. #2
    GONE~
    Join Date
    Apr 2010
    Posts
    6,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have 44, thinking of going up to 46.
    I like it because I live on a hill, I have to climb hill everyday. 44/17 seems perfect for me on going up but going down is too easy, spinning out within a couple of blocks.

  3. #3
    Senior Member
    Join Date
    Jan 2005
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    it's about the chainring/cog ratio, not the ring alone.
    Quote Originally Posted by politely removed
    I am ****ing devoted too. I am moving into my friend's closet just so I can save up for bike stuff.
    well, here's some for you! everything's for sale...

  4. #4
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by dookie View Post
    it's about the chainring/cog ratio, not the ring alone.
    1. could you please explain what that means?

    2. what do you use?

    I'm going to buy a new chainring. My current one is 50+. The rear cog is 16 tooth. New bike, have only had it for a week, and I'm new to biking in general. Any help is appreciated.

  5. #5
    Banana-tastic! JesusBananas's Avatar
    Join Date
    May 2010
    Posts
    1,974
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by westBrooklyn View Post
    What chainring tooth count do you have on your single speed or fixed gear?

    Why do you like that number?
    I must admit that I clicked on this thread because I was thinking about a different kind of tooth...
    Quote Originally Posted by striknein View Post
    The banana has spoken.
    Quote Originally Posted by Sixty Fiver View Post
    "This rides nearly as nicely as your mom."

  6. #6
    THE STUFFED Leukybear's Avatar
    Join Date
    Oct 2009
    Location
    Sandy Eggo, CA
    My Bikes
    CBR11di2
    Posts
    9,755
    Mentioned
    4 Post(s)
    Tagged
    1 Thread(s)
    There recently was a thread exactly like this.....

  7. #7
    GONE~
    Join Date
    Apr 2010
    Posts
    6,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by westBrooklyn View Post
    1. could you please explain what that means?

    2. what do you use?

    I'm going to buy a new chainring. My current one is 50+. The rear cog is 16 tooth. New bike, have only had it for a week, and I'm new to biking in general. Any help is appreciated.
    That's really high, try a 44 or 46, it should be fine.

    Quote Originally Posted by JesusBananas View Post
    I must admit that I clicked on this thread because I was thinking about a different kind of tooth...
    What kind of tooth count...?

  8. #8
    Banana-tastic! JesusBananas's Avatar
    Join Date
    May 2010
    Posts
    1,974
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Vixtor View Post
    What kind of tooth count...?
    Like teeth. In your mouth.

    I thought it was an accident-related thread.
    Quote Originally Posted by striknein View Post
    The banana has spoken.
    Quote Originally Posted by Sixty Fiver View Post
    "This rides nearly as nicely as your mom."

  9. #9
    We haven't located us yet nealjoslyn's Avatar
    Join Date
    Jan 2010
    Location
    Idaho
    My Bikes
    Hong Fu, Mercier Kilo tt, Cannondale 2.8, Takara Grand Touring
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by JesusBananas View Post
    Like teeth. In your mouth.

    I thought it was an accident-related thread.
    haha, if only!

  10. #10
    Listen to me powers2b's Avatar
    Join Date
    Nov 2004
    Location
    Lexus Texas
    Posts
    2,791
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    31 + 1 cap (not bike accident related)
    So that's a 15/16 ratio.
    Pretty smooth setup for the flat beer.

    Enjoy
    Quote Originally Posted by SBFixed View Post
    You're a dick, if your bike gets stolen I hope that you don't get a thread.

  11. #11
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by happypills View Post
    There recently was a thread exactly like this.....
    Sorry. Do you have the link? Didn't see it when I did a search.

  12. #12
    Senior Member
    Join Date
    Sep 2009
    Location
    Chico, CA
    My Bikes
    Ridley X-Night, Wilier Izoard XP, 1981 Bianchi Pista, F. Moser
    Posts
    517
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Gear-trains are incredibly simple, so I'm going to try to explain them briefly.

    If your ratio is 48/16, for instance, it can be simplified to 3/1. That means that for every revolution of the cranks, the wheel does three revolutions. A 45/15 ratio would produce an identical result in terms of pedaling effort required. A ratio of, say, 40/16 means that for every revolution of the cranks, the wheel does two and a half revolutions. It becomes easier to pedal, since the effort you put in is not moving you forward as far. When you're going down a hill, however, this becomes a bad thing, since your cranks will be turning more for each wheel revolution.

  13. #13
    I Like to Bike youngandcurious's Avatar
    Join Date
    Apr 2010
    Posts
    556
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    People ask this question to much

  14. #14
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Young Version View Post
    Gear-trains are incredibly simple, so I'm going to try to explain them briefly.

    If your ratio is 48/16, for instance, it can be simplified to 3/1. That means that for every revolution of the cranks, the wheel does three revolutions. A 45/15 ratio would produce an identical result in terms of pedaling effort required. A ratio of, say, 40/16 means that for every revolution of the cranks, the wheel does two and a half revolutions. It becomes easier to pedal, since the effort you put in is not moving you forward as far. When you're going down a hill, however, this becomes a bad thing, since your cranks will be turning more for each wheel revolution.
    Thank you.

    couple more questions:

    - What is the average or standard or recommended gear ratio for a single speed?

    - On the wikipedia page for bicycle gearing (http://en.wikipedia.org/wiki/Bicycle_gearing) it gives some examples. For shorter rides (up to 5 miles) use a gear around 60. How does that gear number relate to the gear ratio?

    - Regarding the issue of a lower gear ratio complicating going down hills, is that really an issue with a single speed? Or is that more of a fixed gear problem?

    thanks again for the help.

  15. #15
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just found this thread with the chart:
    The Gearing Primer

    Does this mean if I have a 27 inch tire, with a 16 tooth rear cog, that I want a chainring with a tooth count around 39-47 (which would put my gear in the "road use green." with 39 tooth putting me at 65.8 and 47 tooyh putting me at 79.3?

    Sixty Fiver says he likes to be in the 65-70 range for his SS, so that would my preferred chainring tooth count at 39-42?

  16. #16
    Veteran Racer TejanoTrackie's Avatar
    Join Date
    Jul 2009
    Location
    Ciudad de Vacas, Tejas
    My Bikes
    28 frames + 73 wheels
    Posts
    7,169
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Typical single speeds like the Trek Soho S have a gear ratio of 2.6 (44 x17), which works out to 70 gear inches for a 27 inch diameter tire. My SS, which is a conversion of an old Mercier 10-speed from the early 1970's has a 52 x 20, which works out to a 2.6 gear ratio.
    Attached Images Attached Images
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  17. #17
    GONE~
    Join Date
    Apr 2010
    Posts
    6,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by westBrooklyn View Post
    Thank you.

    couple more questions:

    - What is the average or standard or recommended gear ratio for a single speed?

    - On the wikipedia page for bicycle gearing (http://en.wikipedia.org/wiki/Bicycle_gearing) it gives some examples. For shorter rides (up to 5 miles) use a gear around 60. How does that gear number relate to the gear ratio?

    - Regarding the issue of a lower gear ratio complicating going down hills, is that really an issue with a single speed? Or is that more of a fixed gear problem?

    thanks again for the help.
    "Average" ratio is around 2.5-2.8 or so.
    So 44/16 is a kind of common. Again, it depends on how much hill you have to climb and how strong you are.

    Too low of a ratio is not that much of an issue for singlespeed since you can coast down hill.

    Gear inches = diameter of the tire (in inches) times the number of tooth on your chain ring divided by your number of tooth of your cog.
    For example, a person with a 700x23c wheel running a gear ratio of 44/16 will have a gear inches of 72.3
    You can do it with a common calculator if you know the diameter of your tire.
    700x23c tires are 26.275
    700x25c tires are 26.375
    700x28c tires are 26.75
    then you pick whichever tire size
    26.275x44 = 1156.1
    then divided it by 16
    1156.1/16= 72.25625...round it off to the nearest tenth.

    72.3 gear inches.

    I also posted a calculator on your other post, here it is again
    http://software.bareknucklebrigade.c...it.applet.html

  18. #18
    Fresh Garbage hairnet's Avatar
    Join Date
    Apr 2009
    Location
    Los Angeles
    Posts
    10,442
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by westBrooklyn View Post
    Just found this thread with the chart:
    The Gearing Primer

    Sixty Fiver says he likes to be in the 65-70 range for his SS, so that would my preferred chainring tooth count at 39-42?
    no real preferred chain ring range. I use 46x19 to get close to the 65-70 gear range
    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
    Bikerowave
    My Bikes

  19. #19
    Senior Member
    Join Date
    May 2008
    Posts
    174
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No one has asked what kind of terrain he rides yet?
    How are your rides OP, hilly or flat?

  20. #20
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    f50fan.
    I'm in brooklyn. Not many steep hills, but some inclines. Also, doesn't seem like there is a ton of all out speed riding as there are the stop lights and other traffic issues. I'm in my early 30's, and not in the best shape (although I am changing that with this bike!)

    Just to follow up.
    So I have a 27 inch wheel
    16 tooth rear cog
    54 tooth chainring
    puts my gear inches at at 91.1 and gear ratio at 3.37:1

    That's a little ridiculous for a single speed? The guy who I bought the bike from must have been a monster!

  21. #21
    Veteran Racer TejanoTrackie's Avatar
    Join Date
    Jul 2009
    Location
    Ciudad de Vacas, Tejas
    My Bikes
    28 frames + 73 wheels
    Posts
    7,169
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    42 x 16. EOM.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  22. #22
    GSH
    GSH is offline
    Member
    Join Date
    Apr 2005
    Location
    Wisconsin
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm using a 42 x 17 on my Paddy Wagon for use as an errand runner, which is a 66.7 inch gear. For group rides, I take my Orbea Onix with 20 sp. Ultegra.
    Last edited by GSH; 05-30-10 at 07:34 AM.

  23. #23
    Senior Member
    Join Date
    May 2008
    Posts
    174
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by TejanoTrackie View Post
    42 x 16. EOM.
    I'd probably agree with this. I used to run 42 x 16 and just recently switched to 46 x 17 to get more skid patches, with only a slight increase in gear inches. But then again, I was running fixed and skidding easily was part of the reason I liked that ratio.
    For fixed, this ratio would probably be good, but I think if you were running a freewheel you could stand to up the gear inches a bit.

  24. #24
    Senior Member
    Join Date
    Apr 2010
    Location
    Chi-Burbs IL
    My Bikes
    1981 Schwinn Voyageur 11.8, 1981 Schwinn Super Le Tour
    Posts
    68
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    46 x 16 (2.875 or 77.63 gear inches) works for me, tough on climbs, but the good kind of tough.

  25. #25
    Senior Member
    Join Date
    May 2010
    Location
    Brooklyn, NY, USA
    My Bikes
    mid-80's Bianchi, converted to single speed, purple
    Posts
    83
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by oouellette View Post
    46 x 16 (2.875 or 77.63 gear inches) works for me, tough on climbs, but the good kind of tough.
    So this is where I was leaning. This is still a little on the tougher side? maybe 42 or 44 would be even better for me?

    I don't do a lot of climbs, more slight elevation increases.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •