Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-23-07, 05:24 PM   #1
pinetreeforest1
Senior Member
Thread Starter
 
Join Date: Mar 2007
Bikes:
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chain "rub" on rear cogs?

I noticed today while backpedaling slowly, that the chain on my rear wheel (9 speeds) rubs against the inner cog right next to it (in particular gear settings). Occasionally this causes a "stutter." I wonder if this is the noise that I notice while pedaling on the road. How do I fix this? Is it a simple derailer adjustment where I simply loosen the high gear limiting screw?
pinetreeforest1 is offline   Reply With Quote
Old 06-23-07, 05:36 PM   #2
vpiuva
*
 
vpiuva's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 3,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This has nothing to do with your limit screws.
1. Is this only while you are crosschaining? If not, then:
2. May be that you have just a little too much cable tension. Turn the barrel adjuster clockwise just a little at a time and test, but first check for:
3. A bent or sticky chain link. Backpedal very slowly (by hand) in the small/small combination and a bent/sticky link will be visible as it runs over the rear cog and through the derailleur.
vpiuva is offline   Reply With Quote
Old 06-23-07, 05:46 PM   #3
pinetreeforest1
Senior Member
Thread Starter
 
Join Date: Mar 2007
Bikes:
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by vpiuva
This has nothing to do with your limit screws.
1. Is this only while you are crosschaining? If not, then:
2. May be that you have just a little too much cable tension. Turn the barrel adjuster clockwise just a little at a time and test, but first check for:
3. A bent or sticky chain link. Backpedal very slowly (by hand) in the small/small combination and a bent/sticky link will be visible as it runs over the rear cog and through the derailleur.
Thanks for the quick response. No sticky chain links, it's well maintained and new, and I just checked. Can you briefly explain what crosschaining is?

One more thing. When I'm in the big front, smallest back cog setup, the chain is rubbing against the right side of the front derailer. Is THIS a limit screw adjustment problem? Should I loosen the high gear screw? Thanks for all the info.
pinetreeforest1 is offline   Reply With Quote
Old 06-23-07, 06:54 PM   #4
vpiuva
*
 
vpiuva's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 3,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by pinetreeforest1
Thanks for the quick response. No sticky chain links, it's well maintained and new, and I just checked. Can you briefly explain what crosschaining is?

One more thing. When I'm in the big front, smallest back cog setup, the chain is rubbing against the right side of the front derailer. Is THIS a limit screw adjustment problem? Should I loosen the high gear screw? Thanks for all the info.
Cross chaining that would cause your rub would be small ring in front and small rings in rear. Crosschaining also includes the large/large combo - but then you probably wouldn't get the rubbing as I understand it.

And in big front, small rear, this could be a limit screw issue. Can you push the front der over by hand? If not, then loosen your limit screw a little. If you can push it, then you need a little more cable tension.
vpiuva is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 01:18 PM.