Bicycle TutorBicycle Tutor

Show off your bike!

Related video tutorials:
How to Adjust Your Front Derailleur How to Adjust Your Front Derailleur
* Now with 3D interactive instructions
Front derailleur springs off big chainring
#1
I'm tuning my girlfriend's bike, and I've encountered a new problem with her front derailleur. I can use her thumb shifters to pop the chain up onto the big ring, but as soon as I take my finger off the shifter, the derailleur springs back and drags the chain back down to the small ring. The only way to stay in the big ring is to keep the shifter held in (which obviously is a problem). Any help?
Reply
#2
If this is a friction shifter then there should be some way of tightening it up.
Usually there is an adjuster on the top (either a screw of "butterfly").
Just tighten that until the shifter holds it's position.
[font=Trebuchet MS]Ride hard or ride home alone![/font]
Reply
#3
Thumb shifters? Probably gummed up. Take a look at http://forums.bicycletutor.com/thread-900.html
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Problem with my Front Derailleur on my Bike CUDAcores89 1 783 10-17-2017, 08:12 PM
Last Post: kazz
  Front Derailleur/Shifter Problem kazz 0 807 10-06-2017, 02:28 AM
Last Post: kazz
  Front derailleur shifting problem dventura 1 6,708 02-28-2017, 06:07 PM
Last Post: nfmisso
  Front derailleur won't shift into third (largest) gear bruin1989 1 7,868 08-01-2016, 07:14 AM
Last Post: Joe_W
  Front derailleur can't shift from inner chainring to outer...sometimes Ptero 2 4,911 07-19-2016, 02:15 PM
Last Post: Joe_W
  Front derailleur drags on middle chainring? fionn88 1 4,863 06-09-2016, 08:56 PM
Last Post: DaveM
  Remove chain from front derailleur rider2 1 4,192 05-13-2016, 04:16 PM
Last Post: DaveM
  Chain Coming off Randomly / Front Derailleur Jlpicard440 12 7,070 09-07-2015, 06:29 PM
Last Post: painkiller
  Blocked front derailleur? dude 2 3,635 08-27-2015, 06:38 AM
Last Post: dude
  A Front Derailleur mounting and matching problem. qipow 0 3,703 08-08-2015, 11:53 AM
Last Post: qipow

Forum Jump:



ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy / Created by Alex Ramon

feed