HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Articles FAQ Contact About




Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Mon May 07, 2012 2:43 pm 
Offline

Joined: Mon May 07, 2012 10:28 am
Posts: 3
Location: Chiang Mai, Thailand
Recently my track bike that I use at the Chiang Mai velodrome has developed a problem in that as I rotate the pedals, the chain is very taut at one point and incredibly slack at another. I've checked the chain (1/8th) for wear and that's ok; The chainring is a newish Campagnolo Pista 52-tooth and seems perfectly ok; the frame is inline (check in a decent bike shop) so I am at a loss ..... The main problem it causes is when really winding it up, I get harsh noises and the fear that the chain will jump off. Any help available?


Top
 Profile  
 
Posted: Mon May 07, 2012 2:43 pm 


Top
  
 
PostPosted: Mon May 07, 2012 3:44 pm 
Offline
User avatar

Joined: Mon Jan 23, 2006 6:35 am
Posts: 5020
Location: New York
Check bottom bracket it's possibly loose or worn.

_________________
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree


Top
 Profile  
 
PostPosted: Mon May 07, 2012 6:44 pm 
Offline

Joined: Mon Aug 16, 2010 6:43 pm
Posts: 438
Location: Canada
Your chainring could be out of round. try another chainring and see if you still have that issue..

_________________
Flickr
Tarmac SL3 Project Yellow
Follow on Instagram


Top
 Profile  
 
PostPosted: Mon May 07, 2012 11:33 pm 
Offline

Joined: Thu Jan 08, 2009 1:41 pm
Posts: 221
Location: Shetland, Scotland
Sheldon has advice on centering chainwheels on fixed gears....
http://sheldonbrown.com/fixed.html


Top
 Profile  
 
PostPosted: Mon May 07, 2012 11:35 pm 
Offline
User avatar

Joined: Thu May 03, 2007 10:39 am
Posts: 2346
In addition to the above, check the cogs at rear and every single link in the chain to see if one has binded.

_________________
"Physiology is all just propaganda and lies... all waiting to be disproven by the next study."
"I'm not a real doctor; But I am a real worm; I am an actual worm." - TMBG


Top
 Profile  
 
PostPosted: Tue May 08, 2012 5:43 am 
Offline

Joined: Mon May 07, 2012 10:28 am
Posts: 3
Location: Chiang Mai, Thailand
Thanks for your help. I had a new 50-tooth Stronglight chainring and that seems to have been the problem. After flaffing about for an hour I changed the chainring for an old-style Campagnolo 51 -tooth and what do you know? Perfection. Thanks for your help guys.


Top
 Profile  
 
PostPosted: Thu May 10, 2012 11:29 pm 
Offline
User avatar

Joined: Sun Oct 09, 2011 1:09 pm
Posts: 148
Your problem is sorted.
Chain wear is usually uneven and is also the culprit. Possibly the worst thing about track bikes is the drivetrain and having it remain correct.


Top
 Profile  
 
Posted: Thu May 10, 2012 11:29 pm 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 


Who is online

Users browsing this forum: No registered users and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Light bike or stiff bike?

[ Go to page: 1, 2, 3 ]

in Road

Kermithimself

32

2613

Mon Sep 22, 2014 7:19 pm

06SpiceRed View the latest post

There are no new unread posts for this topic. More Super Acciaio + track bike.

in Introduce Yourself / Gallery - Please use metric weights.

Otter

12

1487

Tue Jun 24, 2014 6:23 am

ultimobici View the latest post

There are no new unread posts for this topic. Planet X Pro Carbon track bike

in Cycle Chat

liam7020

2

343

Sun Oct 05, 2014 6:43 pm

liam7020 View the latest post

There are no new unread posts for this topic. Attachment(s) Unknown PS1 track bike fixed gear pursuit style

in For sale - Pictures are mandatory 22-3-13

breakjnky

0

260

Sat Jul 12, 2014 9:53 am

breakjnky View the latest post

There are no new unread posts for this topic. Chain catching on the inside of chainring bolt, chain suck

[ Go to page: 1, 2 ]

in Road

sedluk

15

728

Fri Sep 19, 2014 4:04 pm

ricks123 View the latest post


It is currently Wed Oct 22, 2014 5:07 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB