09-23-2011, 12:03 PM
I have a grip type shifter and I am stuck in high gear (7 speed bike). The shifter actually turns on the handlebars if I apply enough pressure when i try to turn it.
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(09-23-2011, 12:03 PM)devaneym Wrote: I have a grip type shifter and I am stuck in high gear (7 speed bike). The shifter actually turns on the handlebars if I apply enough pressure when i try to turn it.
(09-23-2011, 04:33 PM)nfmisso Wrote: Do the following:
1. disconnect the cable from the derailleur at the derailleur. The derailleur should go to the highest (smallest) cog due to internal spring force. You should be able to push it by hand to the lowest (largest) cog while rotating the pedals to keep the chain moving. Easiest done on a bike stand or upside down.
2. pull the cable housing(s) of the cable, so that there is just a wire coming out of the shifter. The housing(s) should come of easily. Most common issue is lack of lubrication/protection for the wire/housing and they rust together.
3. With just the wire coming out of the shifter; you should be able shift easily and the wire will move in and out of the shifter - keep a light constant tension on the cable while you shift using your fingers to hold the wire.
Most likely you will find no problem with the derailleur.
Most likely your cable rusted on the inside - get a new cable; I get mine from Wal-mart, pull the wire out of the housing, drip a tiny amount of oil into the housing, and put the wire back in. That is enough to coat the inside of the housing and the wire to prevent rusting.
If the shifter does not work; get a new one. They are around $10 from Amazon. If your rear derailleur is NOT a SRAM, you want either a SRAM MRX or a Shimano shifter. If your derailleur is a SRAM you need a SRAM shifter (not MRX). Or you could change to a trigger shifter if you want to try that, such as a SRAM TRX (not for SRAM derailleurs).