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Deore shifter problems

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!TREK4ME! Offline
Senior Member


Posts: 104
Joined: Jun 2013
Post: #1
Deore shifter problems
Hello,
I've got a Trek MTB that the Rapidfire shifter works great on when going up the gears, but when I shift down, it either shifts two gears up or not quite one gear up. Mainly does this in the middle gears(8 speed). The end points are right on and everything is adjusted properly.
What do you guys think the deal is with this??
Thanks,
PJ
Oct 1, 2013 06:03 PM
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DaveM Offline
Veteran Member


Posts: 1,419
Joined: Aug 2008
Post: #2
RE: Deore shifter problems
If the cable tension is adjusted properly, the next thing I would check for is a bent derailleur or hanger. Also look for cable housing that is kinked, splitting, not fitting properly into stops, etc.
Oct 1, 2013 06:07 PM
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1FJEF Offline
Veteran Member

Northern Mexico (Central CA)
Posts: 650
Joined: May 2011
Post: #3
RE: Deore shifter problems
(Oct 1, 2013 06:03 PM)!TREK4ME! Wrote:  I've got a Trek MTB that the Rapidfire shifter

You can clean & lube the shifter, or replace it. This is a common issue. If you look in the Repair Guide at the top of the page there is a video about it.
Oct 2, 2013 02:32 AM
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!TREK4ME! Offline
Senior Member


Posts: 104
Joined: Jun 2013
Post: #4
RE: Deore shifter problems
Cool... Thanks !!!!!!!
Oct 2, 2013 07:49 AM
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!TREK4ME! Offline
Senior Member


Posts: 104
Joined: Jun 2013
Post: #5
RE: Deore shifter problems
Well, I lubed and it is still shifting up two gears or either a half gear... Oh well, looks like a new one is in the future...
Anyone have a good used one they want to part with?? It's a Shimano SL-MC20.
Thanks!!,
PJ
(Oct 1, 2013 06:07 PM)DaveM Wrote:  If the cable tension is adjusted properly, the next thing I would check for is a bent derailleur or hanger. Also look for cable housing that is kinked, splitting, not fitting properly into stops, etc.

Everything here looks fine.
Thanks!!,
PJ
Oct 2, 2013 04:06 PM
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