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  1. #1
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,498
    Which side of the cage is it rubbing (inside or outside)? Not the little pin that connects the sides of the cages, surely?
    Speed comes from what you put behind you. - Judi Ketteler

  2. #2
    Join Date
    Apr 2009
    Location
    Tucson, AZ
    Posts
    4,632
    Quote Originally Posted by OakLeaf View Post
    Which side of the cage is it rubbing (inside or outside)? Not the little pin that connects the sides of the cages, surely?
    It's rubbing the outside. It's not constant in the middle, but it is on the small ring.
    At least I don't leave slime trails.
    http://wholecog.wordpress.com/

    2009 Giant Avail 3 |Specialized Jett 143

    2013 Charge Filter Apex| Specialized Jett 143
    1996(?) Giant Iguana 630|Specialized Riva


    Saving for the next one...

  3. #3
    Join Date
    May 2008
    Location
    northern Virginia
    Posts
    5,897
    If it's only a mile away, I would just walk.

    - Gray 2010 carbon WSD road bike, Rivet Independence saddle
    - Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
    - Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle

    Gone but not forgotten:
    - Silver 2003 aluminum road bike
    - Two awesome worn out Juliana saddles

  4. #4
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,498
    Okay. Sounds like the cable's just too loose, and chainline is contributing to the rub.

    Still, it shouldn't be rubbing at all on the small ring (at least not when you're not cross-chaining), so your low limiter screw probably does need a little tweak.

    Here's a video.

    Look at your derailleur to make sure which is the high limit screw and which is low. They're not always the same as the one in the video, but they're normally marked H and L. If not, you can go to Shimano's website for the instructions for your particular derailleur, or just see which one moves the derailleur when you take all tension off the cable and mark that one as your Low limit screw. (If you tried the High limit screw first, count turns of your screwdriver - the Phillips head makes it easy to see a quarter or half turn - and make sure to put it back where you found it.)

    If you have a barrel adjuster on the cable near the handlebars, then unless it's already at its limit, you won't need to loosen and re-position the cable in its clamp. Unscrew the adjuster (turn it in the direction that makes the housing longer - on my bike, it's away from me as I sit on the bike. You can watch the cable at the derailleur end and see what's going on as you turn the adjuster each way, if you're not sure) until there's no slack in the cable when it's on the smallest chainring.

    If you don't have a barrel adjuster - or if it's already at its limit and you need to reposition the cable in its clamp - then pay attention to how it's routed and how the clamp sits before you loosen the clamp. On some derailleurs, unlike the one in the video that stays neat, the cable will just fly off, and/or you'll accidentally loosen the clamp a little too much and it comes off. So you want to know before you start how it all goes back together. Do make sure that you screw the barrel adjuster all the way back in before you reposition the cable (the guy in the video overlooks that at first and then goes back to it).

    The guy in the video just pulls the cable taut using his fingers before tightening the clamp, but I find a pair of pliers handy here. Just to get a better grip on the cable, try not to crimp it.



    Derailleur adjustments are so simple, and need to be done fairly regularly - sometimes on the road - so it's good to know how to do it yourself.

    Plus, I've always found that learning to fix something of my own just feels tremendously empowering.
    Last edited by OakLeaf; 07-23-2010 at 12:35 PM.
    Speed comes from what you put behind you. - Judi Ketteler

  5. #5
    Join Date
    Apr 2009
    Location
    Tucson, AZ
    Posts
    4,632
    Thanks, Oak. I'll fiddle with it a bit and see. She's due for a tune-up anyway, I think. (Last time it was done was this time last year!) I'll ask at the shop while I'm there if they could show me the basics of derailleur adjustments. They're not likely to be on whatever road I'm riding!
    At least I don't leave slime trails.
    http://wholecog.wordpress.com/

    2009 Giant Avail 3 |Specialized Jett 143

    2013 Charge Filter Apex| Specialized Jett 143
    1996(?) Giant Iguana 630|Specialized Riva


    Saving for the next one...

 

 

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