Bicycle TutorBicycle Tutor

Show off your bike!

Post Reply 

Shifter help

Related video tutorials:
How to Adjust Your Front Derailleur How to Adjust Your Front Derailleur
* Now with 3D interactive instructions
Author Message
papaw1 Offline
New Member


Posts: 4
Joined: Jul 2013
Post: #1
Shifter help
hi, I have a used bike I just purchased, it has a rapid fire shifter on it that wont shift all the way down, at first I thought the problem was in the rear but I'm beginning to believe it's in the shifter. Can someone please tell [/font]me how to determine which it is, the shifter or derailleur?
thanks
Jul 21, 2013 05:13 PM
Find all posts by this user Quote this message in a reply
nfmisso Offline
Veteran Member

San Jose, CA
Posts: 2,067
Joined: Jul 2010
Post: #2
RE: Shifter help
disconnect the cable from the derailleur; move the derailleur by hand across its stroke while turning the pedals (or remove the chain). The derailleur should spring to the H limit (little cog), but without too much force you should be able to move it to the L limit (big cog). Then make sure the limit screws are adjusted correctly.

The problem could also be a frayed cable - I'd replace all of the cables as a matter of course.

Nigel
Jul 21, 2013 05:59 PM
Find all posts by this user Quote this message in a reply
painkiller Offline
Veteran Member

Peoria, IL. USA
Posts: 1,262
Joined: Mar 2011
Post: #3
RE: Shifter help
what is the model of your shifter? how old is it? lets see a pic of it. it could have solidified grease causing it not to work right


There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
Jul 21, 2013 06:49 PM
Find all posts by this user Quote this message in a reply
DaveM Offline
Veteran Member


Posts: 1,300
Joined: Aug 2008
Post: #4
RE: Shifter help
Also, when you disconnect the cable, try holding the cable in your hand with light pressure and shift through the gears on the shifter. Count how many distinct positions you get. (Note that a 7 speed shifter will have 7 positions, but only 6 "clicks"). You should feel the cable move a couple mm on each click. If the # of positions doesn't match how many gears you have in the back, it could be a problem with the shifter or that someone put the wrong shifter on the bike.
Jul 22, 2013 02:46 AM
Visit this user's website Find all posts by this user Quote this message in a reply
papaw1 Offline
New Member


Posts: 4
Joined: Jul 2013
Post: #5
RE: Shifter help
(Jul 21, 2013 05:59 PM)nfmisso Wrote:  disconnect the cable from the derailleur; move the derailleur by hand across its stroke while turning the pedals (or remove the chain). The derailleur should spring to the H limit (little cog), but without too much force you should be able to move it to the L limit (big cog). Then make sure the limit screws are adjusted correctly.

The problem could also be a frayed cable - I'd replace all of the cables as a matter of course.

thank you, that was very helpful
Jul 22, 2013 04:35 PM
Find all posts by this user Quote this message in a reply
papaw1 Offline
New Member


Posts: 4
Joined: Jul 2013
Post: #6
RE: Shifter help
(Jul 22, 2013 02:46 AM)DaveM Wrote:  Also, when you disconnect the cable, try holding the cable in your hand with light pressure and shift through the gears on the shifter. Count how many distinct positions you get. (Note that a 7 speed shifter will have 7 positions, but only 6 "clicks"). You should feel the cable move a couple mm on each click. If the # of positions doesn't match how many gears you have in the back, it could be a problem with the shifter or that someone put the wrong shifter on the bike.

thank you, very helpful
(Jul 21, 2013 05:59 PM)nfmisso Wrote:  disconnect the cable from the derailleur; move the derailleur by hand across its stroke while turning the pedals (or remove the chain). The derailleur should spring to the H limit (little cog), but without too much force you should be able to move it to the L limit (big cog). Then make sure the limit screws are adjusted correctly.

The problem could also be a frayed cable - I'd replace all of the cables as a matter of course.

thanks for the advice......very helpful
Jul 22, 2013 05:29 PM
Find all posts by this user Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Rear shifter not connected to tensioned cable? insurgasaurus 5 469 Mar 31, 2014 10:00 AM
Last Post: insurgasaurus
  Ultegra 600 STI Shifter compatibility questions SlowestPoke 9 934 Mar 3, 2014 06:47 AM
Last Post: SlowestPoke
  SRAM X0 trigger shifter with Shimano Front Derailleur? gregw 6 1,842 Jan 28, 2014 07:58 PM
Last Post: gregw
  Cracked Shifter Bfclax14 1 794 Dec 18, 2013 04:59 PM
Last Post: nfmisso
  Gear cable disconnected from gear shifter Thatkidnoonelikes 2 1,054 Nov 11, 2013 12:11 PM
Last Post: nfmisso
  8-speed shifter and derailleur with 7-speed sprocket? smmr89 8 2,467 Nov 3, 2013 01:18 AM
Last Post: 1FJEF
  Dunlop mountain bike gear shifter gregoire 6 1,613 Oct 18, 2013 10:32 AM
Last Post: bobtravers
  Deore shifter problems !TREK4ME! 4 1,215 Oct 2, 2013 04:06 PM
Last Post: !TREK4ME!
  Shimano Derailleur rear shifter Dave101 3 1,904 Aug 20, 2013 09:25 AM
Last Post: nfmisso
  Shimano Shifter / Derailleur Compatibility Help Request hoakrl 6 2,538 Aug 18, 2013 08:42 AM
Last Post: hoakrl

Forum Jump:


RSS Forum RSS Feeds / Powered by MyBB

ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy

feed