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 06-16-03, 10:40 PM   #1
steveK
Senior Member
Thread Starter
 
Join Date: May 2003
Location: So Cal
Bikes:
Posts: 73
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rear derailler spring tension

Hi, I've been reading and posting some here lately, and I need to know if the small screw on the back of a Deore rear derailler adjusts the spring tension. I turned it in pretty far and I'm not sure what it does, but it looks like it moves the whole derailler backwards. What I want to do is get less chain slap on the chain stay and I thought this might tighten up and put more tension on the chain. :confused:
steveK is offline   Reply With Quote
Old 06-16-03, 11:11 PM   #2
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Bikes:
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That one adjusts the tension of the upper pivot spring, and counterbalances the spring that tensions the lower arm (the lower arm has the derailleur pulleys on it). Boosting its tension should increase the chain tension slightly, but its primary function is to rotate the derailleur back far enough to keep the top derailleur pulley from reaching through the chain links and going "bump-bump-bump" against the teeth of your largest cog.
mechBgon is offline   Reply With Quote
Old 06-17-03, 08:01 AM   #3
Calvin Jones
Senior Member
 
Join Date: Feb 2002
Location: St. Paul, MN, USA
Bikes:
Posts: 98
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You can increase the tension on the cage, but as mentioned above, the lower spring opposes the upper spring. See Derailleur Overhaul

After changing spring holes in the lower cage, you will need to tighten the upper screw (B-screw). If the upper pulley rubs, you will need to go back to the original set up.
Calvin Jones is offline   Reply With Quote
Old 06-18-03, 10:58 PM   #4
steveK
Senior Member
Thread Starter
 
Join Date: May 2003
Location: So Cal
Bikes:
Posts: 73
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
thanks Calvin and mechBgon. I changed the spring hole tonite and got it all put back together, also shortened my chain by a couple of links. The pulley clears OK so I think it will work. It feels stiffer, but I won't know till tomorrow when I get a chance to do my local trails. Ain't working on bikes fun!
steveK is offline   Reply With Quote
Old 06-19-03, 08:17 AM   #5
Hunter
NOT a weight weenie
 
Hunter's Avatar
 
Join Date: Dec 2000
Bikes:
Posts: 1,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You could always add a chain tensioner there are many to choose from, The Kore chain reactor is the least expensive of all of them and looks less of a DH mod than the rest.
Hunter is offline   Reply With Quote
Old 06-20-03, 04:53 PM   #6
steveK
Senior Member
Thread Starter
 
Join Date: May 2003
Location: So Cal
Bikes:
Posts: 73
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Its quiet a bit quieter now, actually noise free going off curbs and small stuff. Thanks again.
steveK 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 05:22 AM.