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 12-27-07, 09:56 AM   #1
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Rear derailer springs

I am either getting weak or picky. I have a friction shifter and if I adjust it so that it is fairly easy to move then the RD will pull it back into a higher gear. I have another bike with an indexing shifter and it pulls easy and then stays in gear. Probably one of the reasons index shifting is desired. It just seems to me that the springs are way to strong. Is there a way to adjust these springs? I am thinking about modifying the spring tension the hard way if there are no adjustments.
jim p is offline   Reply With Quote
Old 12-27-07, 10:16 AM   #2
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,065
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
The problem is that there's not enough friction in your friction shifter. Try tightening the screw on the side of the shifter so it won't slip-
well biked is offline   Reply With Quote
Old 12-27-07, 12:52 PM   #3
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
You DON'T want to weaken the derailleur springs as the shifting would suffer badly. The derailleurs rely on spring tensio to position the cages over the cogs or chainrings. You must have your shifters tight enough to avoid moving under the spring tension and if that makes them hard to move, so be it.

Sun Tour made their Powershifters with a one-way ratchet to make friction shifting easier. If you can find a set of these they will help.
HillRider is offline   Reply With Quote
Old 12-27-07, 02:20 PM   #4
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I dug a little deeper and found that the biggest problem was the short length of cable and housing that goes to the derailer. I got this lubed up and almost all of the problem is now gone. I was surprised at how much friction this small length of housing was producing.
jim p 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 03:23 PM.