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  1. #1
    Senior Member d2create's Avatar
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    Adjusting shifter tension?

    I have some Shimano Deore shifters (similiar to rapid fire) on my Fisher and the one that controls the rear derailur needs some adjusting. The small trigger in front that you pull with your index finger needs to be tighter or something. When i pull it back it goes to its absolute limit before any tension is felt and the shift is made. It's just barely able to shift. Is there a way to tighten that up?
    Sorry for the poor terminology/description.

    Thanks!
    2008 Rivendell A. Homer Hilsen
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    2010 Specialized Rockhopper 29er

  2. #2
    Senior Member Retro Grouch's Avatar
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    See if you can flush the cobwebs out of it's innerds with a shot of WD40 and a blast of compressed air.

  3. #3
    Senior Member IchbinJay's Avatar
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    If there are adjusting barrels at the beginning of the casing you might want to push them out so that you can get more tension, or, if the problem is the limit on the derailleur push out the high screw until you can see the derailleur move towards you.

  4. #4
    Senior Member sydney's Avatar
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    Quote Originally Posted by d2create
    I have some Shimano Deore shifters (similiar to rapid fire) on my Fisher and the one that controls the rear derailur needs some adjusting. The small trigger in front that you pull with your index finger needs to be tighter or something. When i pull it back it goes to its absolute limit before any tension is felt and the shift is made. It's just barely able to shift. Is there a way to tighten that up?
    Sorry for the poor terminology/description.

    Thanks!
    There is a cable tension adjuster at the back of the RD. Suggest you check the repair section at www.parktool.com for the complete drill on derailer adjustment. I think tho that if shifting with the larger lever is ok,the problem may be elsewhere, or the shifter may be hosed.

  5. #5
    Senior Member sydney's Avatar
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    Quote Originally Posted by IchbinJay
    ...., if the problem is the limit on the derailleur push out the high screw until you can see the derailleur move towards you.
    What??

  6. #6
    Senior Member d2create's Avatar
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    Quote Originally Posted by sydney
    There is a cable tension adjuster at the back of the Rd. Suggest you check the repair section at www.parktool.com for the complete drill on derailer adjustment. I think tho that if shifting with the larger lever is ok,the problem may be elsewhere, or the shifter may be hosed.
    Thanks, I'll check it out. I looked at parktools but didn't think it was a derailer issue. And the bike is brand new so i doubt the shifter is hosed. I was doing something the other day (can't remember what) and noticed the difference afterwards. Think it might have been when i was moving the shifters and brake handles closer to the stem? But not sure.
    2008 Rivendell A. Homer Hilsen
    Pics and Specs Here!

    2010 Specialized Rockhopper 29er

  7. #7
    Senior Member d2create's Avatar
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    Ok, i turned that cable tension adjuster on the rear derailler and it didn't seem to fix my problem.
    Maybe if i try to explain it better....
    Basically lets say that the shift lever travels 0-100%. And from 0-75% there is absolutely no tension felt other than the spring that keeps it going back to the 0% position. Then from 75%-100% there is a tension. And the shift is made right at 98-100%.
    With my other shifter i feel tension start much earlier and the shift happens much earlier. Probably about a 20% difference.

    Or maybe i didn't adjust the cable tension enough? Figured I'd check back here again before going to far. Otherwise I will just have my lbs check it out at the first 30 day service (but its more fun fixing it myself).
    2008 Rivendell A. Homer Hilsen
    Pics and Specs Here!

    2010 Specialized Rockhopper 29er

  8. #8
    Senior Member sydney's Avatar
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    Quote Originally Posted by d2create
    Ok, i turned that cable tension adjuster on the rear derailler and it didn't seem to fix my problem.
    Maybe if i try to explain it better....
    Basically lets say that the shift lever travels 0-100%. And from 0-75% there is absolutely no tension felt other than the spring that keeps it going back to the 0% position. Then from 75%-100% there is a tension. And the shift is made right at 98-100%.
    With my other shifter i feel tension start much earlier and the shift happens much earlier. Probably about a 20% difference.

    Or maybe i didn't adjust the cable tension enough? Figured I'd check back here again before going to far. Otherwise I will just have my lbs check it out at the first 30 day service (but its more fun fixing it myself).
    The small trigger on the shifter does nothing but release a ratchet inside the shifter.There is no adjustment.

  9. #9
    Giggity giggity! Dirtbike's Avatar
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    sounds like something is worn. how old are the shifters? i have doere shifters and i can just tap them and they shift down.
    Rides: 06 Demo8 II, Yeti DJ
    Pin it baby!

  10. #10
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    Sydney is correct.
    The small trigger simply releases a catch on the mechanism that wraps (pulls) the cable up. There is no adjustment. (The thumb shifter fans will love this). However, the entire shifter may be able to be rotated forward on the plate it is mounted on. If you do not see an allen-bolt at the top of the shifter this adjustment may not be possible. And remember rotating the shifter will not change how much travel you have in the trigger util it engauges the catch mechanism.

    I know the shifter is on a newer bike and that the other (left/front) shifter has a different amount of travel, but new doesn't mean pooh because it could easily be defective and comparing it to a front shifter is apples and oranges.

    I would compare it to a new shifter on the same make and model of bicycle that is on the sales floor where you made your purchase. If it is as new as you say, you will be under warranty and the lbs should replace it if it proves to be a defective shifter. Careful! if you find out that the other shifter has the same amount of travel, you may find out that you just do not care for the shifters that were specified for you bike.

    P.S. remember to go out and just ride the silly thing!

    Grok85

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