Front Derailleur won't shift to Low gear
01-19-08 | 01:12 PM
#1
Thread Starter
Senior Member
Joined: Sep 2006
Posts: 355
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Front Derailleur won't shift to Low gear
It's a Shimano RDX shifter & a Deore LX front derailluer. It's stuck in the high gear & will not shift back. Is there anything I can try myself before taking to the LBS? Thanks.
01-19-08 | 03:44 PM
#4
Senior Member
Joined: Dec 2004
Posts: 1,509
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From: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
Probable causes:
1. Bad shifter
2) Mis-adusted fd
3) Dirty cable/cable guide under bottom bracket
1. Bad shifter
2) Mis-adusted fd
3) Dirty cable/cable guide under bottom bracket
01-19-08 | 03:58 PM
#5
Really Old Senior Member
Joined: Feb 2007
Posts: 14,679
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From: Mid Willamette Valley, Orygun
Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds. 2019 Giant Explore E+3
I would think that possibly the High Limit screw may need to be backed off slightly to allow the der to release. The cable tension is probably too high and the der is getting "jammed tight" against the stop.
01-19-08 | 04:10 PM
#6
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Joined: Dec 2004
Posts: 1,509
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From: Quahog, RI
Bikes: Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
If it was working OK previously, I'd address the cable issue first. Limit screws don't get out of whack. Easiest thing would be to disconnect the cable and manually check the cage throw, check that the cable is being properly released and then check thecable itself.
01-19-08 | 06:01 PM
#7
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From: Ladysmith, (Vancouver Island) British Columbia
Bikes: Surly Disc trucker, Surly Troll, Valence Carbon Road, Haro Zeon Dually, GT Dyno Criuser
Try releasing the cable from the derailler then try the shifter without cable tension. Go gently .Usually it is jammed in the lever assy from what I call "dry shifting". "Dry shifting" is operating the shifter / derailler mechanisms when not on the bike riding. Usually it happens when the bike is not being rode and someone tries the shifter .
Be gentle, The levers are not happy with aggressive forceful action.
Be gentle, The levers are not happy with aggressive forceful action.
