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)

chain popping

Reply

Old 08-03-08, 09:59 PM
  #1  
dalyry
Jedi Apprentice
Thread Starter
 
dalyry's Avatar
 
Join Date: Aug 2008
Location: Boston, MA
Posts: 21

Bikes: Novara express, SE draft lite (frankenstein)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
chain popping

hey everyone,

i just put together my first fg conversion about a month ago. I was having alot of problems with the chain popping off on the chainring. I'm fairly certain that this was due to a less than perfect chain line, however after rearranging some spacers on the hub the frequency of that has gone down dramaticly (its happened once since). I have noticed the sound and feel associated with this popping a couple times without the actual effect of the chain leaving either the cog or chainring. What could be causing this?


ryan
dalyry is offline  
Reply With Quote
Old 08-03-08, 10:23 PM
  #2  
lymbzero
otherwiseordinary
 
lymbzero's Avatar
 
Join Date: Jan 2006
Location: California
Posts: 697
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Possible problems:

1. Chainline.
2. Loose Chain.
3. Your track nuts are loose? Or if you're using QR... yikes.
4. Ramped chain rings.
5. Not the best chain. I like 1/8" myself.
6. Kink in the chain?
7. Bent frame or chainring.

Thats all I can think of. Hope this helps.
lymbzero is offline  
Reply With Quote
Old 08-03-08, 10:27 PM
  #3  
mangpress
waste
 
mangpress's Avatar
 
Join Date: Jun 2008
Location: Perth, Australia
Posts: 278

Bikes: work fix, play fix, dk 20", cruiser, ******* parts

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^+1

furthermore, loose lockring.
eccentric bb? if so is the unit tight enough?
mangpress is offline  
Reply With Quote
Old 08-04-08, 09:05 AM
  #4  
dalyry
Jedi Apprentice
Thread Starter
 
dalyry's Avatar
 
Join Date: Aug 2008
Location: Boston, MA
Posts: 21

Bikes: Novara express, SE draft lite (frankenstein)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the feedback, I think that a bent chainring is the culprit. It was on the bike when I got it at a flea market, but haven't had the $ to replace it yet. Looks like i'll have to tighten my belt a little. or can I fix this using brute force and a hammer?
dalyry is offline  
Reply With Quote
Old 08-04-08, 09:08 AM
  #5  
ZiP0082
Senior Member
 
ZiP0082's Avatar
 
Join Date: May 2008
Location: Brooklyn, NY
Posts: 1,703

Bikes: 2008 Mercier Kilo TT

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i'd imagine you may be able to try to bend it slightly in a vice. i'd try to be gentle though.
ZiP0082 is offline  
Reply With Quote

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