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

Front derailleur spring unsprung

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 derailleur spring unsprung

Old 11-21-20, 05:09 PM
  #1  
_ForceD_
Senior Member
Thread Starter
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island
Posts: 1,421

Bikes: Several...from old junk to new all-carbon.

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 157 Times in 103 Posts
Front derailleur spring unsprung

Hereís the issue with a friendís front derailleur Iím trying to repair. Itís an older Tiagra 9 triple 31.8 clamp-on. The short end of that spring that I am pointing at with the arrow on the RIGHT needs to be behind the notch that the arrow on the LEFT is pointing to. That spring is responsible for pushing the derailleur back out when you downshift. The problem is...Iíve been trying and I canít get it back to that notch. And even if I can...some of the notch is worn away and there might not be enough of the notch left to hold the spring. Iíd at least like to see if itíll hold. But getting it back to that notch is proving very difficult. Anyone have any suggestions? ó Dan

_ForceD_ is offline  
Old 11-21-20, 05:21 PM
  #2  
Wanderer
aka Phil Jungels
 
Wanderer's Avatar
 
Join Date: Apr 2005
Location: North Aurora, IL
Posts: 8,191

Bikes: 08 Specialized Crosstrail Sport, 05 Sirrus Comp

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 190 Post(s)
Liked 65 Times in 49 Posts
I think I would write that off as a lost cause. That's a pretty heavy spring, even under optimum conditions.
Wanderer is offline  
Old 11-21-20, 05:45 PM
  #3  
_ForceD_
Senior Member
Thread Starter
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island
Posts: 1,421

Bikes: Several...from old junk to new all-carbon.

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 157 Times in 103 Posts
Also...it seems searching for a replacement is unsuccessful so far. Can anyone suggest a replacement that is compatible with the Tiagra 9 speed triple front with a 31.8 clamp?

Dan
_ForceD_ is offline  
Old 11-21-20, 06:25 PM
  #4  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 32,400

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 1491 Post(s)
Likes: 0
Liked 310 Times in 246 Posts
Find any suitable braze-on front derailleur and get a 1-3/8" diameter adapter clamp. Here is a suitable braze-on fd:

https://www.jensonusa.com/Microshift...UaAuppEALw_wcB
HillRider is offline  
Old 11-21-20, 07:29 PM
  #5  
mitchmellow62
Senior Member
 
Join Date: Aug 2014
Posts: 174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 47 Post(s)
Liked 18 Times in 15 Posts
Check out this repair: Fixing a front derailleur with a broken spring retention tab (MacGuyver) . I did and though my job wasn't as neat/professional it seems to be working well. Nothing to lose.
mitchmellow62 is offline  
Old 11-21-20, 09:29 PM
  #6  
_ForceD_
Senior Member
Thread Starter
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island
Posts: 1,421

Bikes: Several...from old junk to new all-carbon.

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 157 Times in 103 Posts
Originally Posted by mitchmellow62 View Post
Check out this repair: Fixing a front derailleur with a broken spring retention tab (MacGuyver) . I did and though my job wasn't as neat/professional it seems to be working well. Nothing to lose.
Iíd thought of something similar to this but on this particular derailleur there just isnít that much to drill into right there. But when I saw the 1/16 inch suggestion...I thought that might work. And, just as the bit bored through...it broke. So, I used the stock of the bit instead of a finishing nail...which as mentioned I donít think would have held in this case. Then, it took me about a hundred tries to the the spring back behind my new notch. But I finally got it and the derailleur seems to be functioning correctly. Thanks.
Hereís a pic of my repair...



Dan

Last edited by _ForceD_; 11-21-20 at 10:53 PM.
_ForceD_ is offline  
Old 11-22-20, 07:47 AM
  #7  
freeranger
Senior Member
 
freeranger's Avatar
 
Join Date: Jun 2005
Location: Kentucky
Posts: 1,776

Bikes: 06 Lemond Reno, 98 GT Timberline mtn.bike

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Liked 231 Times in 158 Posts
I had an older Tiagra ('06) derailleur that did the same thing several years ago. Unfortunately, the der. which I bought as a replacement is not avail. now. But seems that a Sora would work, but I'd check to be sure it's a clamp on, as pic for the listing and clamp diams. indicate it is a clamp-on, but the print states braze on. Pic sure indicates a clamp, but check. Amazon.com : SHIMANO Front Mech Sora R3030 9s tpl 28.6/31.8/34.9 : Sports & Outdoors
Shimano's site indicates it's a band, but listing is for FD-R3030-B, assuming the -B is for Band: FD-R3030-B (shimano.com)

Last edited by freeranger; 11-22-20 at 08:17 AM.
freeranger is offline  
Old 11-22-20, 01:16 PM
  #8  
_ForceD_
Senior Member
Thread Starter
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island
Posts: 1,421

Bikes: Several...from old junk to new all-carbon.

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 157 Times in 103 Posts
Originally Posted by freeranger View Post
Shimano's site indicates it's a band, but listing is for FD-R3030-B, assuming the -B is for Band: FD-R3030-B (shimano.com)
Hopefully the B doesnít indicate Braze-on. But since they list seat tube measurements I guess it is clamp on.

Dan
_ForceD_ is offline  
Old 11-22-20, 01:22 PM
  #9  
freeranger
Senior Member
 
freeranger's Avatar
 
Join Date: Jun 2005
Location: Kentucky
Posts: 1,776

Bikes: 06 Lemond Reno, 98 GT Timberline mtn.bike

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Liked 231 Times in 158 Posts
From Shimano's site:

FD-R3030-B

SHIMANO SORA - Front Derailleur - Clamp Band Mount - Road - 3x9-speed
The -B is the one with the clamp band.
freeranger is offline  
Old 11-25-20, 08:35 PM
  #10  
_ForceD_
Senior Member
Thread Starter
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island
Posts: 1,421

Bikes: Several...from old junk to new all-carbon.

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 157 Times in 103 Posts
Originally Posted by Wanderer View Post
That's a pretty heavy spring, even under optimum conditions.
It sure is! As I said above...I got the hole drilled, and used the stock of a broken 1/16 bit for the replacement notch. Then...while adjusting the shifting/derailleur that broke. Drill bits are hardened!!! So off with the derailleur again. I inserted another piece of the drill bit and so far itís holding.

Dan
_ForceD_ 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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.