Notices
Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

Smallest cog?

Old 05-26-08, 10:56 PM
  #1  
HOLYROLLER
Member
Thread Starter
 
HOLYROLLER's Avatar
 
Join Date: Apr 2008
Location: Spokane
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Smallest cog?

What is the smallest cog available that would work on a FG? Who supplies it? Havent been able to find anything smaller than 12T. Thanks in advanced, HR.
HOLYROLLER is offline  
Old 05-26-08, 11:03 PM
  #2  
Peedtm
Tell them I hate them
 
Peedtm's Avatar
 
Join Date: Oct 2006
Location: Boise, ID
Posts: 939

Bikes: Specialized Allez Epic '91, IRO Mark V Pro, Schwinn Traveler

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Any smaller and it won't be able to thread on to the hub (You'll need a specific BMX hub.) Also, if you go smaller you'll need to run a half link chain.

edit:
Heres an 8 tooth
https://smartbikeparts.com/search_details.php?itm=HU9360

edit2: I should mention this will be ss, not fixed

Last edited by Peedtm; 05-26-08 at 11:17 PM.
Peedtm is offline  
Old 05-26-08, 11:20 PM
  #3  
Cyclist0383
Banned
 
Join Date: Nov 2004
Posts: 10,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by HOLYROLLER View Post
What is the smallest cog available that would work on a FG? Who supplies it? Havent been able to find anything smaller than 12T. Thanks in advanced, HR.
Out of curiosity, why would you want the smallest cog possible?
Cyclist0383 is offline  
Old 05-26-08, 11:21 PM
  #4  
Peedtm
Tell them I hate them
 
Peedtm's Avatar
 
Join Date: Oct 2006
Location: Boise, ID
Posts: 939

Bikes: Specialized Allez Epic '91, IRO Mark V Pro, Schwinn Traveler

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
^weight savings, duh.
Peedtm is offline  
Old 05-26-08, 11:39 PM
  #5  
c0urt
moving target
 
c0urt's Avatar
 
Join Date: Oct 2006
Location: birmingham, al
Posts: 2,931

Bikes: looks like a specialized crux now

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 123 Times in 55 Posts
I am curious to , the smallest dura-ace cog is 12t
smaller than that your teeth are not big enough.
I can't run a bigger ring up front up front because it will not clear my chain stays
and i just moved to an area where I spin out very often.
c0urt is offline  
Old 05-27-08, 12:06 AM
  #6  
trons
yo yo yo yo yo
 
Join Date: Nov 2005
Location: delaware
Posts: 2,518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
da only goes to 13. superbe pro goes down at 12 and you need a special lockring.
12 is the smallest you can get.
trons is offline  
Old 05-27-08, 12:14 AM
  #7  
Sixty Fiver
Bicycle Repair Man !!!
 
Sixty Fiver's Avatar
 
Join Date: Sep 2007
Location: YEG
Posts: 27,268

Bikes: See my sig...

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 43 Times in 29 Posts
Apparently... Phil makes an 11 tooth that also requires a special lock ring.

Aside from those folks who run fixed folders where a really small rear cog is needed for gearing, I can't see any reason why anyone would want to run such a small cog as anything below 14 teeth really cuts into the drives efficiency, can run harshly, and will wear out extremely quickly.

What kind of gearing would a person be looking at ?
Sixty Fiver is offline  
Old 05-27-08, 12:24 AM
  #8  
trons
yo yo yo yo yo
 
Join Date: Nov 2005
Location: delaware
Posts: 2,518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
it sure isn't here..
https://philwood.com/Track%20Cogs.htm

pretty sure 12 is physically the smallest you can make them
trons is offline  
Old 05-27-08, 12:39 AM
  #9  
sivat
Geek Extraordinaire
 
sivat's Avatar
 
Join Date: Feb 2006
Location: Long Beach, CA
Posts: 1,769

Bikes: Bianchi Advantage Fixed Conversion; Specialized Stumpjumper FS Hardtail

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The threading on a track hub has a 1.375" diameter. a 12t cog has a pitch circle diameter of 1.9", measured at approximately the middle of the tooth. That means you have less than 1/4" of material between the threads and the bottom of the tooth. Less than that and things will break. Also, you will start to have interference between the chain and the outer edge of the lockring.
__________________
I'd rather have a bottle in front of me than a frontal lobotomy.

Sintesi Conversion Serotta Track
sivat is offline  
Old 05-27-08, 01:51 AM
  #10  
LWaB
Senior Member
 
Join Date: Dec 2005
Location: Auld Blighty
Posts: 2,244

Bikes: Early Cannondale tandem, '99 S&S Frezoni Audax, '65 Moulton Stowaway, '52 Claud Butler, TSR30, Brompton

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 1 Time in 1 Post
Originally Posted by trons View Post
it sure isn't here..
https://philwood.com/Track%20Cogs.htm

pretty sure 12 is physically the smallest you can make them
It is and you need a stepped lockring to clear the chain.
LWaB is offline  
Old 05-27-08, 03:32 AM
  #11  
~Stuart~
oOooo, five bucks
 
~Stuart~'s Avatar
 
Join Date: Jul 2007
Location: Toronto, On
Posts: 846

Bikes: Giant OCR touring(06), Norco Storm (05)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by LWaB View Post
It is and you need a stepped lockring to clear the chain.
Just so you know. If you click on the link, it is not there.
~Stuart~ is offline  
Old 05-27-08, 03:37 AM
  #12  
pirate golf
MTN Bikin'
 
Join Date: May 2007
Location: Las Vegas, NV
Posts: 135
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by ~Stuart~ View Post
Just so you know. If you click on the link, it is not there.
Maybe he was agreeing to the, "12 is the smallest you can make them," comment...?
pirate golf is offline  
Old 05-27-08, 03:52 AM
  #13  
~Stuart~
oOooo, five bucks
 
~Stuart~'s Avatar
 
Join Date: Jul 2007
Location: Toronto, On
Posts: 846

Bikes: Giant OCR touring(06), Norco Storm (05)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
oh, maybe. i though it was a "there is 11 you just cant see it" comment


if not, my bad.
~Stuart~ is offline  
Old 05-27-08, 04:32 AM
  #14  
LWaB
Senior Member
 
Join Date: Dec 2005
Location: Auld Blighty
Posts: 2,244

Bikes: Early Cannondale tandem, '99 S&S Frezoni Audax, '65 Moulton Stowaway, '52 Claud Butler, TSR30, Brompton

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 1 Time in 1 Post
pirate golf FTW
LWaB is offline  
Old 05-27-08, 10:11 AM
  #15  
HOLYROLLER
Member
Thread Starter
 
HOLYROLLER's Avatar
 
Join Date: Apr 2008
Location: Spokane
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Ziemas View Post
Out of curiosity, why would you want the smallest cog possible?
I want a difficult ratio to build up the strength in my legs. This is part of the reason I started riding my bike again and why I chose to ride FG.

Thanks all for the input, it looks as though I will go with 55T x 12T. Currently I run 55T x 19T.
HOLYROLLER is offline  
Old 05-27-08, 10:25 AM
  #16  
Jabba Degrassi
FNG
 
Jabba Degrassi's Avatar
 
Join Date: Nov 2007
Location: Toronto, ON
Posts: 2,313

Bikes: 2008 IRO Angus, 2008 Jamis Exile 29er

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Can I touch you(r quads)?
Jabba Degrassi is offline  
Old 05-27-08, 10:33 AM
  #17  
Cyclist0383
Banned
 
Join Date: Nov 2004
Posts: 10,082
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by HOLYROLLER View Post
I want a difficult ratio to build up the strength in my legs. This is part of the reason I started riding my bike again and why I chose to ride FG.

Thanks all for the input, it looks as though I will go with 55T x 12T. Currently I run 55T x 19T.
That's a massive jump. Before you blow out your knees maybe you should take a bit smaller steps......
Cyclist0383 is offline  
Old 05-27-08, 10:49 AM
  #18  
deadforkinglast
Senior Member
 
Join Date: Dec 2007
Posts: 413
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HOLYROLLER View Post
I want a difficult ratio to build up the strength in my legs. This is part of the reason I started riding my bike again and why I chose to ride FG.

Thanks all for the input, it looks as though I will go with 55T x 12T. Currently I run 55T x 19T.
55x12 is 120 gear inches. That's more than olympic track racers use to win gold medals. I don't think there's any benefit to getting a 12t cog, unless you don't really like going up hills, ever.
deadforkinglast is offline  
Old 05-27-08, 10:59 AM
  #19  
Yoshi
Senior Member
 
Join Date: Nov 2004
Posts: 2,544
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Graeme Obree ran a 52x12 for his hour record and had the highest development meters (9.25) of any hour record holder (as far as my research tells me). I seem to remember hearing that someone had used a 55x11 (if they had, obviously it was with a custom hub/cog) but can't seem to find any info on that.

Indurain used a 59x13 but according to my sources had 8.86 development meters suggesting that either there is a typo or Indurain used smaller wheels.
Yoshi is offline  
Old 05-27-08, 11:01 AM
  #20  
Nims
Square-o-dynamic
 
Nims's Avatar
 
Join Date: Mar 2006
Location: www.toothpastefordinner.com
Posts: 418

Bikes: something fixed, something broken

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
55x12 probably won't be hard enough for you. You should offer a taxi-esque service where people just ride on your back while you take them up hills. That'll do the trick.
Nims is offline  
Old 05-27-08, 11:37 AM
  #21  
c0urt
moving target
 
c0urt's Avatar
 
Join Date: Oct 2006
Location: birmingham, al
Posts: 2,931

Bikes: looks like a specialized crux now

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 253 Post(s)
Liked 123 Times in 55 Posts
i run like 40x12 on 650c rims
for about 72 gi's
so for me it isnt so bad
I just cant change my front chain ring. no clearance
c0urt is offline  
Old 05-27-08, 11:56 AM
  #22  
HOLYROLLER
Member
Thread Starter
 
HOLYROLLER's Avatar
 
Join Date: Apr 2008
Location: Spokane
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Nims View Post
55x12 probably won't be hard enough for you. You should offer a taxi-esque service where people just ride on your back while you take them up hills. That'll do the trick.
We already do that as part of our PT program, thanks for the idea though.
HOLYROLLER is offline  
Old 05-27-08, 11:59 AM
  #23  
HOLYROLLER
Member
Thread Starter
 
HOLYROLLER's Avatar
 
Join Date: Apr 2008
Location: Spokane
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by deadforkinglast View Post
55x12 is 120 gear inches. That's more than olympic track racers use to win gold medals. I don't think there's any benefit to getting a 12t cog, unless you don't really like going up hills, ever.
The benefit would depend on your goal, mine is strength. There arent any hills in my route.
HOLYROLLER is offline  
Old 05-27-08, 01:54 PM
  #24  
dobber
Perineal Pressurized
 
dobber's Avatar
 
Join Date: Oct 2003
Location: In Ebritated
Posts: 6,555
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Suntour offered an 11 tooth cog. Since chain clearance is an issue, the cog was undercut and you needed to use a special lockring.

OT: While googling Suntour Cog I was presented with this.

__________________
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
dobber is offline  
Old 05-27-08, 05:32 PM
  #25  
Jabba Degrassi
FNG
 
Jabba Degrassi's Avatar
 
Join Date: Nov 2007
Location: Toronto, ON
Posts: 2,313

Bikes: 2008 IRO Angus, 2008 Jamis Exile 29er

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dobber View Post
Suntour offered an 11 tooth cog. Since chain clearance is an issue, the cog was undercut and you needed to use a special lockring.

OT: While googling Suntour Cog I was presented with this.

I'd tour her suns.
Jabba Degrassi is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.