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

Tuning FD to stop dropping chain inside

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.

Tuning FD to stop dropping chain inside

Old 05-31-13, 06:26 PM
  #1  
tahoeeddie
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 73

Bikes: 2012 Cervelo R3 Team

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Tuning FD to stop dropping chain inside

Does anyone have any suggestions on how to tune the FD so that it will stop dropping the chain to the inside?
Ever since I got a Quarq Elsa power meter, I've been dropping my chain to the inside on average once per ride.
I've done what I can think of mostly, like adjusting the limit screw and fine tuning with the barrel adjuster. anymore of fidgeting with that, and the chain will rub when in the lowest gear.

And it's a pain because with the way that the Quarq spider is, once the chain drops, I'm pretty much guaranteed that I won't be able to pedal out of it. I have to stop, get off the bike, flip it over, and ease the chain out. The sensors on the spiders have edges that catch the chain if you try to pedal, and lock it in the BB well.
tahoeeddie is offline  
Old 05-31-13, 06:29 PM
  #2  
Kimmo 
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 9,455

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1471 Post(s)
Liked 687 Times in 486 Posts
If messing around with fine adjustments to its angle doesn't sort it, you might have to resort to a chain catcher.

I tried a Deda Dog Fang, which kinda worked but not 100%... I think a SRAM-style one would be the go.

What FD are you using?
Kimmo is offline  
Old 05-31-13, 06:42 PM
  #3  
tahoeeddie
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 73

Bikes: 2012 Cervelo R3 Team

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'm having a k-edge chain catcher installed this weekend. I have a Shimano Ultegra FD.
I'm kind of worried though if I install a chain catcher, and it still manages to drop inside (people say that it's not supposed to, but i've heard that it happens), that I won't be able to get it out without taking off the chain catcher.
tahoeeddie is offline  
Old 05-31-13, 07:54 PM
  #4  
Kimmo 
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 9,455

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1471 Post(s)
Liked 687 Times in 486 Posts
If it still happens then either you haven't set it up optimally or it's not designed well enough...

Nothing I tried made the Dog Fang work 100%, but it was still an improvement... except for when the chain did make it off the ring - it certainly didn't help when I had to put the chain back.

The difficulty in setting a chain catcher up is that it's virtually impossible to eyeball perfectly and often it's hard to get the chain to jump off intentionally; the best you can do a lot of the time is go and jump off gutters while downshifting.

Last edited by Kimmo; 05-31-13 at 07:58 PM.
Kimmo is offline  
Old 05-31-13, 07:59 PM
  #5  
FastJake
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,952
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 183 Post(s)
Liked 86 Times in 72 Posts
Did your ring sizes change when you went to the power meter? Something must have changed, if it didn't drop the chain before.
FastJake is offline  
Old 06-01-13, 12:52 AM
  #6  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,331 Times in 839 Posts
Jump stop, K edge, or any of those sort of things keep the chain from going past the inside ring, entirely..
fietsbob is offline  
Old 06-01-13, 06:13 AM
  #7  
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,238

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1411 Post(s)
Liked 986 Times in 672 Posts
+1 for the N-Gear Jump Stop, I preemptively fit them to all of my bikes. Correctly installed there is no contact with the chain but there is no way the chain can be dropped; there is just no place for it to go.

Having said that make certain that the derailleur cage is set parallel to the chainrings and that your low limit screw is set to have the derailleur cage just barely clear the chain in the small front/big rear gear combination.
dsbrantjr is offline  
Old 06-02-13, 10:25 PM
  #8  
tahoeeddie
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 73

Bikes: 2012 Cervelo R3 Team

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The chain ring sizes did not change with the power meter install. compact both. i checked the limit screws again last night, and had two drops today during my ride. once, i was climbing up a wooden bridge, and the second time i was descending down a shallow decline and shifted the rear derailleur, was already in the small ring up front, and somehow it popped off. must have hit a bump.
really getting annoying.

oh, i also have a compact, so wonder if maybe the distance to the small ring is just far? i didn't have any chain drops before the power meter install. the bike had a compact when i bought it. so not sure what is up with that.
tahoeeddie is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
deacon mark
Bicycle Mechanics
3
09-13-14 05:56 PM
Christopher86
Bicycle Mechanics
9
07-18-13 09:31 PM
mynameistaken
Bicycle Mechanics
2
06-22-13 11:20 PM
lazerzxr
Road Cycling
13
03-18-10 04:34 PM

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.