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  1. #1
    Junior Member JRobida999's Avatar
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    Jul 2010
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    1996 Specialized Hardrock GX
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    rear derailleur jumping gears while upshifting... also not shifting into 7...

    Hey,

    1995 Specialized Hardrock
    New SHIMANO ST-EF50 SHIFT/BRAKE LEVER
    Stock Shimano SIS rear derailleur
    7 spd cassette

    The problem:

    I am installing the new shift/brake levers on my bike. The front derailleur shifter and both brake levers installed and are working perfectly. All gears, both upshifting and downshifting, on the rear shifter work fine when on the stand. I get on the bike outside though and it starts fine. Goes 1-2-3 no problem, doesn't shift to 4. I upshift to 5 where it skips 4 from 3 to 5. Goes 5-6 no problem. And finally will shift from 6-7 just fine about half of the time. The other half of the time it won't go into 7. It will downshift through all 7, including 4 just fine!

    Is this an adjustment issue or a damaged part issue?

    I went through the install procedure on the Park website and it appears as if everything is fine. Like I said, all shifting works perfect on stand.

    Help!! Thanks

    Jake
    What would you do if you weren't afraid?
    1996 Specialized Hardrock GX
    • SHIMANO ST-EF50 SHIFT/BRAKE LEVERS
    • TEKTRO 839AL LPULL BRAKE

  2. #2
    Senior Member
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    Feb 2007
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    Maybe the rear derailleur is not in alignment.

  3. #3
    Senior Member JonathanGennick's Avatar
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    Apr 2007
    Location
    Munising, Michigan, USA
    My Bikes
    Hifi 29er, Stumpy 29er, Rockhopper 29er, ...
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    I would check the alignment w/a hanger alignment gauge. I'm not saying alignment is the problem, but the symptoms seem right, and alignment is usually the first thing I check anyway.

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