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

Front Derailleur Cable Routing

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 Cable Routing

Old 04-09-12, 06:28 PM
Junior Member
Thread Starter
Join Date: May 2006
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Front Derailleur Cable Routing

I've got a 34.9mm, clamp-on Shimano front derailleur. I was at the bike co-op trying to replace my shifter cable, which had become frayed badly, but got stumped at the final stage. I am unsure how to route the derailleur cable in a way that it doesn't end up touching a pulley mechanism on the derailleur body!

Picture 6 illustrates the view of the bike, upside-down, with the cable routing under the bottom bracket guide. Usually it's a straight shot from the BB to the clamping mechanism, right? Pic 7 is a wider shot of all the routing from the shifters down to the BB. Pic 9 is the view from above.

The cable gets obstructed while in the small gear. With an upshift, and subsequent downshift, the FD pushes the cable off that pulley towards the rear of the bike- it doesn't seem like the cable naturally wants to stay on the pulley.

I've searched the forums, and have come across warnings to make sure the cable's in the designated groove in the pinch bolt. The cable is located in the groove. Not sure what else to do..

Is the derailleur alignment off? Might it be defective, and I should just buy a replacement?


Attached Images
File Type: jpg
9.jpg (91.5 KB, 60 views)
File Type: jpg
6.jpg (89.2 KB, 51 views)
File Type: jpg
7.jpg (93.6 KB, 51 views)
jagerk is offline  
Old 04-09-12, 08:40 PM
over the hill
juls's Avatar
Join Date: Apr 2009
Location: florida
Posts: 1,410

Bikes: 72 maino-76 austro daimler inter 10-? giant kronos

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 82 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Approach the anchor bolt from the other side. That groove washer spins dosen't it? I pull the cable away from the chainwheel when attaching my fd. Also learned to take a few pics before I disassemble these days.
juls is offline  
Old 04-09-12, 08:56 PM
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 32,860

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

Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 1671 Post(s)
Likes: 0
Liked 530 Times in 397 Posts
Something is definitely wrong but I can't tell what it is from the pictures. Your cable routing looks right and the cage alignment isn't that bad. I'd take it back to the Co-Op and see if one of the experienced mechanics there can figure it out.
HillRider is offline  
Old 04-10-12, 07:58 PM
Shinjukan's Avatar
Join Date: Aug 2011
Location: Ercildoun, PA
Posts: 128

Bikes: 2016 Fuji Sportif One.0, 2011 Cannondale Synapse 6

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 3 Times in 1 Post
I would say based on the pics that you should thread the cable "beneath" that rubber washer thing (refer to 9.jpg) before securing it with the derailleur cable screw. My bike doesn't have it but I think that rubber washer makes the cable taut without going overboard with the tension.

I might be wrong though so it's just my 2 cents.
Shinjukan is offline  
Related Topics
Thread Starter
Last Post
Mike Bennett
Bicycle Mechanics
08-04-19 04:00 AM
Bicycle Mechanics
06-22-19 09:37 PM
Bicycle Mechanics
08-20-17 02:02 PM
Bicycle Mechanics
01-06-17 12:07 AM
Bicycle Mechanics
09-04-12 08:45 AM

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 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.