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  1. #1
    Senior Member
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    Changing Cables on Gripshift SRT 400

    Hi all,
    I'm sure this is pretty simple but I can't get into the Gripshifts on my wife's Trek to change the cable. I can see what looks like a "trapdoor" on the inner side of the shifter but I can't get it to open. What is the trick before brute force results in an "oh, shouldn't a done that" elpisode? After I get it opened up, then what? Thanks in advance.

    Walt

  2. #2
    a77impala a77impala's Avatar
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    I volunteer at local Yellow Bike and when we get a bike with Grip Shift that needs work it gets replaced with thumb shifters.
    I personally do not like them and find them not worth the bother of trying to fix.
    Maybe I just have never put the effort into them required but our customers are better off with thumb shifters anyway.
    We give a lot of bikes away to children that can't afford to buy one.
    Treks, 85-420, 87-560, 90-930,92-970, 95-930, LeMonds, 2000 Zurich, 04 Tourmalet, 05 Etape, 06-Versailles

  3. #3
    nice idea, poor execution
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    I think the SRT400 is similar to this one here: http://bicycletutor.com/grip-shift-cable/
    Kevin Duffy, Harris Cyclery, West Newton, MA.
    blog.harriscyclery.com

  4. #4
    Senior Member
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    Thank you, helicomatic. That was close enough to get me there. Some people don't like gripshifts, and I was leary of going to them at first. After riding with thumb shifters for 20+ years, I picked up a parts bike with MRX shifters on it. I tried them on my first commuter. Liked them. When I picked up my Trek 830 with the SRT400's on it, I loved them. They're sturdier. That was a requirement for the bike that I just rebuilt for my wife. Small frame, and Gripshifts. Now, to just get her out on it.

    Walt

  5. #5
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    Quote Originally Posted by wilber.71 View Post
    Hi all,
    I'm sure this is pretty simple but I can't get into the Gripshifts on my wife's Trek to change the cable. I can see what looks like a "trapdoor" on the inner side of the shifter but I can't get it to open. What is the trick before brute force results in an "oh, shouldn't a done that" elpisode? After I get it opened up, then what? Thanks in advance.

    Walt
    The method described in the following video works ALMOST.

    https://www.youtube.com/watch?v=YmOVOc-iLcY

    One problem is that the cover shown at 5:15 in the video is not attached to the shifter body with a screw and that I cannot remove the cover. Therefore, I cannot insert the new cable into the hole going through the barrel adjuster.

    I tried to remove the cover with a screw driver by pushing it in different directions, but it did not budge. I definitely need to know how to let the new cable go through the barrel adjuster.

  6. #6
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    Quote Originally Posted by wilber.71 View Post
    Hi all,
    I'm sure this is pretty simple but I can't get into the Gripshifts on my wife's Trek to change the cable. I can see what looks like a "trapdoor" on the inner side of the shifter but I can't get it to open. What is the trick before brute force results in an "oh, shouldn't a done that" elpisode? After I get it opened up, then what? Thanks in advance.


    Walt

    The method described in the following video works ALMOST.


    https://www.youtube.com/watch?v=YmOVOc-iLcY


    One problem is that the cover shown at 5:15 in the video is not attached to the shifter body with a screw and that I cannot remove the cover. Therefore, I cannot insert the new cable into the hole going through the barrel adjuster.


    I tried to remove the cover with a screw driver by pushing it in different directions, but it did not budge. I definitely need to know how to let the new cable go through the barrel adjuster.

  7. #7
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    Just underneath the barrel adjuster is a 'trap' door. A circular mold imprint is just above the slightly recessed slot. Use a flat tip screwdriver as close to the same size to avoid marring the plastic. The lift motion is straight away from the bar. I used the bar itself for leverage. It should come off as a sliding motion away from the bar.

    The gripshift came with 850 (my 950 was rapidfire and rapidstolen). I have been developing 'shift thumb' syndrome which is becoming a seriously disabling condition. I'm hoping the gripshift will help keep me on the trails.
    Last edited by Trekker850; 01-16-15 at 11:50 AM. Reason: update

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