Top pull derailleur for Ultegra triple crank?

Discussion in 'Cycling Equipment' started by L. Smythe, Aug 18, 2003.

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  1. L. Smythe

    L. Smythe Guest

    Has anyone successfully used any top pull fder on the Ultegra triple?

    Is there any gizmo available to route a top pull cable so that it can operate a bottom pull fder?
    Was thinking of maybe a seat tube clamp with a pulley on it so the cable comes down and around the
    pulley to the fder...
     
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  2. L smythe-<< Has anyone successfully used any top pull fder on the Ultegra triple? >><BR><BR>

    Saches..but they are 'no mas'..

    << Is there any gizmo available to route a top pull cable so that it can operate a bottom pull fder?
    >><BR><BR>

    Use a shimano e-clamp and then mount a 'cross' pulley onto it...we do this all the time.

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
     
  3. L. Smythe

    L. Smythe Guest

    "Qui si parla Campagnolo" <[email protected]> wrote in message
    news:[email protected]...
    > << Is there any gizmo available to route a top pull cable so that it can operate a bottom pull
    > fder? >><BR><BR>
    >
    > Use a shimano e-clamp and then mount a 'cross' pulley onto it...we do this
    all
    > the time.

    Not sure what you mean, do you mean to use a fder clamp that goes on the BB? And what is a 'cross'
    pulley? Very interested in getting this solution...
     
  4. John Everett

    John Everett Guest

    On 20 Aug 2003 13:17:17 GMT, [email protected] (Qui si parla Campagnolo) wrote:

    >L smyth-<< Not sure what you mean, do you mean to use a fder clamp that goes on the BB? And what is
    >a 'cross' pulley? Very interested in getting this solution.
    >>><BR><BR>
    >
    >A shimano e-clamp is the thingy for shimano mounted to the BB shell fders that stabilized them. Use
    >just the clamp that has a drill hole in it, Mount a tyipcal fder cross pulley to it, mount assembly
    >to the bottom of the seattube, route the top pull cable down, around the pulley, attach to bottom
    >pull front der.-About $24 or so for both.

    Being a fairly good amateur bike mechanic I tried to visualize what Peter was talking about. A
    google search for "shimano e-clamp" turned up:

    http://www.bikeusa.com/MERCHANT2/merchant.mv?Screen=PROD&Store_Code=MSGI&Product_Code=FD9010

    This made sense so I tried to find "cross pulley". I couldn't find anything bicycle specific but
    did turn up:

    http://www.maverickcustoms.com/catalog.php?action=124&item_id=83

    ;-)

    jeverett3<AT>earthlink<DOT>net http://home.earthlink.net/~jeverett3
     
  5. John Everett <[email protected]> wrote:

    > Being a fairly good amateur bike mechanic I tried to visualize what Peter was talking about. A
    > google search for "shimano e-clamp" turned up:

    > http://www.bikeusa.com/MERCHANT2/merchant.mv?Screen=PROD&Store_Code=MSGI&Product_Code=FD9010

    > This made sense so I tried to find "cross pulley". I couldn't find anything bicycle specific but
    > did turn up:

    > http://www.maverickcustoms.com/catalog.php?action=124&item_id=83

    Hmm, it comes in 65 and 70 tooth, for you big gear mashers.

    Pietro is talking about this:

    http://shop.store.yahoo.com/cyclocrossworld/derclamwitpu.html

    A little pulley you mount below the fder, behind the seat tube. The cable goes down and loops around
    the pulley, coming back up to the derailleur clamp. Useful for cyclocross bikes with top tube cable
    routing (for mud/dirt avoidance) and road STI shifters, since Shimano does not make a road top pull
    derailleur.

    I have an early 90s (?) MTB with top tube routing and a pulley mount brazed onto the rear of the
    seat tube, presumably before top pull MTB derailleurs were common. It works although I think it
    makes the front shifting a little stiffer.

    BTW, I noticed that Shimano now makes a Deore front derailleur which can be either top or bottom
    pull through some pulley-esque cable routing. This doesn't solve the OP's problem, but I wonder if
    any of you mechanics have seen these and how well they work.
     
  6. Dan Brussee

    Dan Brussee Guest

    On 20 Aug 2003 17:27:19 -0800, Benjamin Weiner <[email protected]> wrote:

    >BTW, I noticed that Shimano now makes a Deore front derailleur which can be either top or bottom
    >pull through some pulley-esque cable routing. This doesn't solve the OP's problem, but I wonder if
    >any of you mechanics have seen these and how well they work.

    I cant give you first hand knowlege since the der did not work on my application, but it seems to be
    quite nice. I have the Deore Mega9 unit and it comes with spacers for different frame sizes (quite a
    nice fit too). It seems like it would be a good way of handling this over/under issue. It's just an
    extension of the pulling arm that allows the cable to run up and around to then connect to the
    pulling arm - making it work as though the cable was pulling from above. I cannot comment on if this
    orientation would make it sluggish or not.

    If anyone wants this der, I can let them have it at my cost plus shipping: $15 plus shipping. I will
    accept paypal. It is a black clamp with silver cage. Mounted, but never shifted.
     
  7. Bikefixr

    Bikefixr Guest

    I've done that. I use a derailleur clamp with a small grooved pulley attached to route the cable.
    Depending on the frame, I've drilled and tapped a small hole to mount a pulley as well. But why not
    just use a top-pull front deraileur? They do work. If you use a thumb-shifter, move the cable to the
    inner position on the pinch bolt to get greater throw.
     
  8. bikefixr-<< But why not just use a top-pull front deraileur? They do work. If you use a
    thumb-shifter, move the cable to the inner position on the pinch bolt to get greater throw.
    >><BR><BR>

    With ultegra or any other road STI, with a MTB top pull front der, they do not work.

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
     
  9. Michael

    Michael Guest

    I am in similar situation to the original poster, but I'm using a double crankset, and I'd prefer to
    use a top-pull derailleur rather than a pulley with a bottom-pull (and I don't need to worry about
    STI, as I'm using bar end shifters).

    My problem is finding a modern top-pull top-swing derailleur that will shift either a 48/38 or 48/36
    set of double chainrings. I tried the current XT, but since it is designed for mega-9 drivetrains,
    it wouldn't work (the inner cage rubbed against the smaller ring when shifted to the large ring).

    I've heard that the old style (pre compact-drive, mega 9) derailleurs will work with these larger
    chainrings, but does anyone know which particular derailleurs will work for me? Better yet, does
    anyone know where I can find one?

    The specs of the recent XTR front derailleurs indicate a large ring capacity of 48 teeth-- does that
    mean this derailleur (the M952) would work better for my application than the current XT?

    TIA Michael

    In article <[email protected]>, Qui si parla Campagnolo
    <[email protected]> wrote:

    > bikefixr-<< But why not just use a top-pull front deraileur? They do work. If you use a
    > thumb-shifter, move the cable to the inner position on the pinch bolt to get greater throw.
    > >><BR><BR>
    >
    > With ultegra or any other road STI, with a MTB top pull front der, they do not work.
    >
    > Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    > (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
     
  10. Michael

    Michael Guest

    Thanks for your help, Peter! However, I do NOT plan on using STI, so will these mountain derailleurs
    just not work for 48/38 or 48/36 double setups, even with bar end shifters?

    Michael

    In article <[email protected]>, Qui si parla Campagnolo
    <[email protected]> wrote:

    > michael-<< My problem is finding a modern top-pull top-swing derailleur that will shift either a
    > 48/38 or 48/36 set of double chainrings. I tried the current XT, but since it is designed for
    > mega-9 drivetrains, it wouldn't work (the inner cage rubbed against the smaller ring when shifted
    > to the large ring). >><BR><BR>
    >
    > It's not completely the arc of the cage but also the arm length and dimension of the fder, that
    > makes it not compatible with road STI.
    >
    > No MTB front der will really work..need a Sachs road top pull, NOS now, tough to find.
    >
    > michael<< The specs of the recent XTR front derailleurs indicate a large ring capacity of 48
    > teeth-- does that mean this derailleur (the M952) would work better for my application than the
    > current XT? >><BR><BR>
    >
    > See above,, not compatible with road STI
    >
    >
    > Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    > (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
     
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