Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

front derailer both overshifts and doesnt shift

Search
Notices
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.

front derailer both overshifts and doesnt shift

Thread Tools
 
Search this Thread
 
Old 06-12-07, 10:45 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Feb 2007
Location: Los Angeles
Posts: 242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
front derailer both overshifts and doesnt shift

Hi,

I've been having some issues with overshift going into my large chainring (or I guess I should say, going right past and off of my large chainring ) on my front derailer. I've got 2 chainrings (42/52) and I tried adjusting the limit stop to ensure it wouldnt overshift, and then it became a crapshoot as to whether it would get into the big chainring at all, often requiring 3 or 4 tries to get it to upshift, however it STILL will come off the outside every once in a while.

Is there something else I should be adjusting?

Any advice greatly appreciated.

Thanks

-- James
jbarros is offline  
Old 06-12-07, 10:51 AM
  #2  
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times in 6 Posts
Possibly the derailleur's position. It should clear the big ring by only 1 or 2 mm, and the outside rail should be parallel to the chain when on the big ring and smallest cog.
Also you may need to adjust the cable tension.
Al1943 is offline  
Old 06-12-07, 10:51 AM
  #3  
Senior Member
 
Join Date: Apr 2007
Location: Minneapolis, MN
Posts: 176
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Have you checked out the positioning of the actual derailer?

I had a similar problem on my wife's bike. I finally realized that the derailer was mounted so the front was pointing inward (I didn't install it originally), and adjusting the way the derailer was mounted fixed everything (then of course I had to readjust all the other stuff that would have been right in the first place).
SonataInFSharp is offline  

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.