Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the November Giveaway for the Fiido D11 folding sport e-bike


Shimano derailler issue
#1
My old mountain bike has Shimano thumb shifters. The front derailler will shift to the larger chainrings, but springs back onto the smallest chainring if I let go of the shifter. Any advice? Thanks.
  Reply
#2
Look at the top of the shifter and see if there is a screw or a flat ridge you can grab. If so, tighten these down so that the shifter will still move, but doesn't slip back to the small gear by itself. If not, maybe picture or model # of the shifter would help.
  Reply
#3
(07-24-2012, 03:56 PM)DaveM Wrote:  Look at the top of the shifter and see if there is a screw or a flat ridge you can grab. If so, tighten these down so that the shifter will still move, but doesn't slip back to the small gear by itself. If not, maybe picture or model # of the shifter would help.


Thanks. They are Shimano Diore XT model shifters, and on top there is an allen nut, but it seems pretty darn tight. I can try to tighten it a bit more. There are a couple of screws on the bottom/side, but they seem quite secure and didn't seem to affect anything. But thanks for your suggestions. I'll keep playing with them!
  Reply
#4
let me see a pic of your thumb shifters
There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
  Reply
#5
Thanks - I have to leave town this morning for a trip, but will continue on my return (getting a picture posted takes some thought for me - I'm not hugely tech savvy).
  Reply
#6
Picture of the top and one picture of the bottom, save both pictures to your desktop. When you click on the "new reply" button on this site scroll down there is Attach Picture or attach file, after you click that a menu will pop up and then you can navigate the menu to your desktop and find the name of the picture, click once on the name of the picture and then click ok.Then click Post reply. That simple.
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
  Reply
#7
Sorry about the hiatus - I've been out of town. Here are a couple pics of my old front derailler and thumb controls. Again, the front controls will get the derailler to the larger two chainrings, but it springs back to the smaller ring as soon as I let go of the trigger. Any suggestions of how to get this to work again? Thanks. Kay[attachment=3411][attachment=3412]
  Reply
#8
Hi Kay;

Your shifter looks like a trigger shifter; not a thumb shifter.

http://www.interlocracing.com/shifter_thumb1.jpg

Trigger shifters are far more complicated.
Nigel
  Reply
#9
(08-15-2012, 04:22 PM)nfmisso Wrote:  Hi Kay;

Your shifter looks like a trigger shifter; not a thumb shifter.

http://www.interlocracing.com/shifter_thumb1.jpg

Trigger shifters are far more complicated.

Thanks. Should I take it to someone or is it not worth even fixing?
Thanks. Is it worth fixing, i.e., paying someone to do it? KD
  Reply
#10
Kayd, update your bio and tell us where you are from, I may have parts. tell us the model number of your shifter. it is hard to see and under by the levers. they appear to be Sti push push style and not trigger.
I f you are in the us and will pay shipping I will have a look for you and may have spare parts to get you going again.
There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
  Reply
#11
The factory grease may have stiffened up over the years to the point that the springs that work the pawls are not letting them engage. I took my shifters off the bike and soaked them in Simple Green for a couple of days and that fixed it. Then I found out that WD40 applied generously through the cable cap or other similar entry (without taking the cover off) will cure the same issue. Worth a try...
  Reply
#12
Thanks. I'll give it a try.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
3,132
12-08-2019, 08:18 AM
Last Post: CharleyFarley
 
6,486
02-24-2017, 12:45 PM
Last Post: Mountain
 
11,708
10-22-2014, 08:38 AM
Last Post: cny-man
 
12,303
03-19-2014, 11:02 AM
Last Post: nfmisso
 
5,539
01-11-2014, 04:16 PM
Last Post: mhaughee
 
10,665
08-22-2013, 08:23 PM
Last Post: Painkiller
 
6,781
07-08-2013, 09:39 AM
Last Post: RBurrelli

Forum Jump:

[-]
10 Latest Posts
Please help me identify this old bicycle...
Today 11:36 AM
Seeking recommendations
Yesterday 06:18 PM
What is your dream cycling destination?
Yesterday 02:33 AM
LYGIE AND ATALA WINTER PROJECTS
11-30-2021 10:34 AM
Yet another bike ID thread (Pseudo-Batta...
11-30-2021 06:18 AM
Schwinn meridian fork replacement
11-30-2021 12:41 AM
Help! Trying to identify this bike
11-29-2021 07:20 PM
New Memeber
11-27-2021 06:51 PM
Budget Carbon Frames! ...who has bought...
11-26-2021 12:45 AM
Cycling motivation through the dark mont...
11-25-2021 06:28 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. ReapThaWhirlwind
27 posts
no avatar 2. Jesper
18 posts
no avatar 3. jeffg
10 posts
no avatar 4. steven chen
6 posts
no avatar 5. Zviedrs
5 posts