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Bike won't shift

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buddy20 Offline
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Posts: 3
Joined: Mar 2011
Post: #1
Bike won't shift
I have a trek mountain bike. The front derailleur will not shift from the largest gear at all. Can someone give me some suggestions as to what to check for.

Thanks in advance.
Mar 31, 2011 10:18 AM
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cyclerUK Offline
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Posts: 753
Joined: Jan 2009
Post: #2
RE: Bike won't shift
Undo the cable where it is clamped on the dérailleur and see if the dérailleur will move by hand.

Ride hard or ride home alone!
Mar 31, 2011 11:33 AM
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buddy20 Offline
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Posts: 3
Joined: Mar 2011
Post: #3
RE: Bike won't shift
(Mar 31, 2011 11:33 AM)cyclerUK Wrote:  Undo the cable where it is clamped on the dérailleur and see if the dérailleur will move by hand.

I removed the cable and it did move. How do I know if the cable has the correct tension. It seems when I shifted from 2 to 1 there was some slack in the cable?

Thanks for the help.
Apr 6, 2011 12:03 PM
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cyclerUK Offline
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Posts: 753
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Post: #4
RE: Bike won't shift
Does the cable move correctly when operating the gear shifter? (pull the cable by hand while moving shifter).
If it does then set the shifter to the same position as the low gear and reconnect the cable.
Generally take the slack out of the cable before finally clamping.
Now try changing gear. Somewhere, depending on the style of changer, there should be an adjuster to fine tune the cable.

Ride hard or ride home alone!
Apr 6, 2011 12:59 PM
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buddy20 Offline
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Posts: 3
Joined: Mar 2011
Post: #5
RE: Bike won't shift
(Apr 6, 2011 12:59 PM)cyclerUK Wrote:  Does the cable move correctly when operating the gear shifter? (pull the cable by hand while moving shifter).
If it does then set the shifter to the same position as the low gear and reconnect the cable.
Generally take the slack out of the cable before finally clamping.
Now try changing gear. Somewhere, depending on the style of changer, there should be an adjuster to fine tune the cable.


Thank you, that seemed to fix the problem. I appreciate all the help.
Apr 13, 2011 08:49 AM
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cyclerUK Offline
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Posts: 753
Joined: Jan 2009
Post: #6
RE: Bike won't shift
Hi, Thanks for the update. Glad it works. Smile

Ride hard or ride home alone!
Apr 13, 2011 10:46 AM
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