Go Back  Bike Forums > Bike Forums > Singlespeed & Fixed Gear
Reload this Page >

Is there Enough Slack in my Chain?

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)

Is there Enough Slack in my Chain?

Old 10-05-09, 06:54 PM
  #1  
shubonker
danke
Thread Starter
 
shubonker's Avatar
 
Join Date: Jun 2008
Location: nyc
Posts: 821
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Is there Enough Slack in my Chain?

This is my SS conversion, i'm still a n00b, so please let me know if there is too much slack or just enough? I bought a new cog, and it seems my tensioner may no longer be needed.

Here it is without any pressure:


Here it is with pressure (simulating foot pedal):


Have i found the magic cog/chainring combo? Or is there too much slack? Chainline seems straight, and doesn't derail when i test rode it.

Btw, what is the downside to having a chain that is too slack?

(Apologies for being such a n00b, thanks!)
shubonker is offline  
Old 10-05-09, 07:19 PM
  #2  
destikon
FNG
 
destikon's Avatar
 
Join Date: Mar 2009
Location: Quarry Stone
Posts: 877

Bikes: Raleigh Special * Nishiki MTN Winter Commuter * Trek Soho 3 * Specialized Langster Seattle

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Take a yard stick and run it from the top of the chain ring and follow it to the top of the cog. If it sags more than an 1/8 inch it's to slack. OR maybe it's 3/16? I can't remember. Looks alright to me though.
destikon is offline  
Old 10-05-09, 07:31 PM
  #3  
DARTHVADER
the darkness
 
DARTHVADER's Avatar
 
Join Date: Oct 2007
Posts: 391
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
that looks fine as long as you got a good chainline.
DARTHVADER is offline  
Old 10-05-09, 08:02 PM
  #4  
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Posts: 12,258

Bikes: Bianchi, Miyata, Dahon, Rossin

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
there will be a tight spot and slack spot in the chainring.

if your chain doesn't move vertically by more than 1cm in the slack spot, it should be fine.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline  
Old 10-05-09, 08:48 PM
  #5  
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Posts: 28,353

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 23 Times in 17 Posts
All of the above posts are wrong.

There aren't "measurements" for chain tension. It's the tightest you can get the chain without getting a binding spot. You can't tell from pictures uhless it's one extreme or the other. If i'm going to guess it's too loose based on pic #1. If you start dropping chains on bumps, then it's too loose.
operator is offline  
Old 10-05-09, 09:07 PM
  #6  
beeftech
Senior Member
 
beeftech's Avatar
 
Join Date: Aug 2008
Location: Brooklyn finally.
Posts: 832

Bikes: Bianchi San Jose, fixed

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Jesus you people run such tight chains...
beeftech is offline  
Old 10-05-09, 10:13 PM
  #7  
PluperfectArson
沒有腳踏車的居民
 
PluperfectArson's Avatar
 
Join Date: Jul 2007
Location: Honolulu, HI
Posts: 1,283

Bikes: Mericier Kilo TT Pro

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by beeftech View Post
Jesus you people run such tight chains...
Seriously.
PluperfectArson is offline  
Old 10-05-09, 10:15 PM
  #8  
Johnny Nemo
Senior Member
 
Johnny Nemo's Avatar
 
Join Date: Sep 2007
Location: Woolloomooloo, Australia
Posts: 414

Bikes: A fixed gear, a vintage roadie and a POS.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If it falls off, it's too loose. If you can't pedal, it's too tight. That looks in between. Noob points for you.
Johnny Nemo is offline  
Old 10-05-09, 10:42 PM
  #9  
spcialzdspksman
Hella Raw
 
spcialzdspksman's Avatar
 
Join Date: Jul 2009
Location: San Francisco, CA
Posts: 820
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
-
-
Attached Images
File Type: jpg
3327trningoveplenky.jpg (30.8 KB, 10 views)
spcialzdspksman is offline  
Old 10-05-09, 10:51 PM
  #10  
vegipowrd
Lifer
 
vegipowrd's Avatar
 
Join Date: Sep 2008
Location: San Jose, CA
Posts: 250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Too tight a chain on a ss will cause a lot of ghost pedaling. That's when the wheel spins forwards and the pedals try to follow. Too much of that is telling your that your freewheel is trying to bind up.
vegipowrd is offline  
Old 10-05-09, 10:56 PM
  #11  
feetpower
n00b
 
feetpower's Avatar
 
Join Date: Jul 2009
Location: SGV
Posts: 301

Bikes: Mercier Kilo TT - Grapesoda

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
mines used to be slack like OP's first pic and my lbs tightened it a just a little bit and now i have a tight and slack spot. i was all worried that i wore out/stretched out those parts but whatevers its stock kilo parts. ride till it breaks!
feetpower is offline  
Old 10-06-09, 09:43 AM
  #12  
beeftech
Senior Member
 
beeftech's Avatar
 
Join Date: Aug 2008
Location: Brooklyn finally.
Posts: 832

Bikes: Bianchi San Jose, fixed

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
also op, it looks like you seriously need to adjust your brake pads.
beeftech is offline  
Old 10-06-09, 11:15 AM
  #13  
Flash_BeeZy
Senior Member
 
Join Date: Jun 2009
Location: San Jose. Ca
Posts: 261

Bikes: surly Steamroller, Mercier Kilo TT pro

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Why not just get that chain adjuster from Surly?
Flash_BeeZy is offline  
Old 10-06-09, 11:27 AM
  #14  
bones_mcbones
Banned.
 
Join Date: Sep 2009
Location: Winnipeg
Posts: 2,975

Bikes: Fiori Fixie powder blue w/ granny bars

Mentioned: 89 Post(s)
Tagged: 0 Thread(s)
Quoted: 6495 Post(s)
Likes: 0
Liked 27 Times in 26 Posts
I run a loose chain, mostly cause my chainring is so sharkfined if I put any tighter I have massive binds.
bones_mcbones is offline  
Old 10-06-09, 01:53 PM
  #15  
shubonker
danke
Thread Starter
 
shubonker's Avatar
 
Join Date: Jun 2008
Location: nyc
Posts: 821
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by beeftech View Post
also op, it looks like you seriously need to adjust your brake pads.
Thanks for heads up.

Running at 46x16, not having any problems with bumps on the rode. Chain manages to stay on. Don't notice any of the aforementioned "ghost pedaling". Will keep my tensioner with me when i do a long ride in case i need to put it back on.

Thanks for the info guys.
shubonker is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

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

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.