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

Slipping Derailleur

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.

Slipping Derailleur

Old 06-14-19, 01:24 PM
  #1  
smikeybikey
Newbie
Thread Starter
 
smikeybikey's Avatar
 
Join Date: Jun 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Slipping Derailleur

I wondered if any of you knowlegeable folks could help me?My bike gears have recently started slipping .Its as if it's going to change gear by itself but it remains on the same cog.Its at the rear and mainly second smallest just after I have changed down.Thanks a lot
smikeybikey is offline  
Old 06-14-19, 02:15 PM
  #2  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,928

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6832 Post(s)
Likes: 0
Liked 211 Times in 176 Posts
cable slipping perhaps ...

as usual :1st have bike shop check hanger alignment..

it's the foundation of indexed shifting..
fietsbob is offline  
Old 06-14-19, 08:27 PM
  #3  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,653

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1729 Post(s)
Likes: 0
Liked 45 Times in 32 Posts
If the chain remains on the initial cog then either the cable is only slightly "loose/tight" and it's catching the adjacent cog, jumping up but not derailing to the next door cog. Or the chain/cog mesh is no longer sufficient to withstand pedaling forces and the chain is moving up the teeth faces and climbing over the teeth tops. Do check for bent teeth or links too. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 06-14-19, 08:57 PM
  #4  
Bigbus
Senior Member
 
Bigbus's Avatar
 
Join Date: Mar 2018
Location: Central West Coast
Posts: 268

Bikes: In Flux

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Liked 5 Times in 4 Posts
I always thought that was a sign that the chain and/or cassette was worn out. But I had that happen when I was first learning how to adjust the rear hanger/derailleur. After watching a few YouTube vids I got it right and now it's become second nature-both determining wear and making fine adjustments.
Bigbus is offline  
Old 06-14-19, 09:46 PM
  #5  
JoeTBM 
Droid on a mission
 
JoeTBM's Avatar
 
Join Date: May 2018
Location: Palm Coast, FL
Posts: 236

Bikes: Diamondback Wildwood Classic

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 4 Times in 4 Posts
Originally Posted by Bigbus View Post
I always thought that was a sign that the chain and/or cassette was worn out. But I had that happen when I was first learning how to adjust the rear hanger/derailleur. After watching a few YouTube vids I got it right and now it's become second nature-both determining wear and making fine adjustments.
I have also seen frozen links on the chain causing the same feeling
__________________
JoeTBM (The Bike Man)
I'm a black & white type of guy, the only gray in my life is the hair on my head.
JoeTBM is offline  
Old 06-15-19, 03:49 AM
  #6  
Kars
Senior Member
 
Join Date: Apr 2018
Posts: 77
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
My 2 cents: Check chain for wear and cassette for wear just in case. It could also be that you need new cables/housings or just adjustment of cable tension.
Kars is offline  
Old 06-15-19, 09:23 AM
  #7  
Bigbus
Senior Member
 
Bigbus's Avatar
 
Join Date: Mar 2018
Location: Central West Coast
Posts: 268

Bikes: In Flux

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Liked 5 Times in 4 Posts
Originally Posted by JoeTBM View Post
I have also seen frozen links on the chain causing the same feeling
Yes, a stiff or frozen link on a chain will definitely cause this to happen. But if you're cleaning and lubing your chain regularly, that shouldn't happen, Right? Pick a spot on the chain and work each link by hand rotating it until you've gone all the way around. It's always possible you got a piece of grit or something in there that's causing a link to bind. Good luck,
Bigbus is offline  
Old 06-16-19, 01:45 PM
  #8  
smikeybikey
Newbie
Thread Starter
 
smikeybikey's Avatar
 
Join Date: Jun 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
thanks guys -chain and sprocket don't seem worn so might be cable needs very slight adjustment
smikeybikey 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

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