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  1. #1
    just keep riding BluesDawg's Avatar
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    I'm building up a 1989 Trek 970 MTB frame that has top tube cable routing. All the bikes I've had before ran the derailleur cables under the bottom bracket. I can see how the rear shift cable will run down the seat stay to the derailleur but I can't figure out how to run the front der. cable. I don't see any cable housing stops on the seat tube.
    Do I just run the housing all the way from the cable stop at the rear of the top tube to the front derailleur? Or maybe I should add some kind of bolt on cable housing stop on the seat tube.
    There is what looks like a bushing bolted to the back of the bottom bracket shell. Would that be for turning the cable up toward the derailleur? I am using a Deore front derailleur which is supposed to be capable of bottom or top pull routing.
    - Thanks
    Last edited by BluesDawg; 01-04-06 at 10:10 AM. Reason: clarification
    The more you ride your bike, the less your ass will hurt.

  2. #2
    <>< SoonerBent's Avatar
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    Oct 2004
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    If there is no cable stop one will have to be added. I'm not familiar with your bike but I don't see how they got by without one. Most MTBs I've seen have a stop 2 to 3 inches below the seat tube, top tube joint. This makes for a short piece of housing from the top tube stop the the seat tube stop.

    SS

  3. #3
    biked well well biked's Avatar
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    Older front derailleurs had a cable stop built into the derailleur. The cable housing was run all the way to the derailleur, and then a short length of bare cable went from the built-in stop to the bolt on the derailleur that secures the cable. If you're going to use a newer front derailleur, you can get a clamp-on cable stop and position it on the seat tube wherever you want it-
    Last edited by well biked; 01-04-06 at 12:06 PM. Reason: spelling

  4. #4
    just keep riding BluesDawg's Avatar
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    2014 Specialized Crave Pro 29, 2014 Specialized Crux EVO Carbon Disc, 2012 Black Mountain Cycles Monster Cross, 2011 Specialized Roubaix SL3 Expert Compact, 2009 Salsa Casseroll, 2003 KHS Milano Tandem, 1986 Nishiki Cadence rigid MTB
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    Thanks. That make sense.
    I've rigged it up with a too small downtube clamp-on cable stop that came with a set of Suntour barcons. I have it held on with a zip tie. Works fine and will have to do until I can find a proper clamp-on. So far I can only find them with two holes made for the downtube.
    The more you ride your bike, the less your ass will hurt.

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