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Top Pull Front Derailleur(12 posts)

Top Pull Front Derailleurhobz
Jul 23, 2003 1:01 PM
I am looking for advice on chain ring compatibility with a top pull front derailleur cable routing. It doesn't appear that there is a triple ring top pull front derailleur compatible with road gearing (52/42/30)

I have a colnago dream cross that was set up with a single 42 chain ring on a ultegra triple crank. To make the bike more flexible for road burns I was trying to add a 53/52 and a 30 along with a front derailleur. Low and behold, road bike front derailleurs seem to be univerally bottom pull. (I am a bit new to the road bike thing) I would appreciate some advice on my options. regards - hobz
re: Top Pull Front Derailleurhummu
Jul 23, 2003 1:17 PM, or better bike shops. Hopefully a little less money at a better bike shop.
Couple of options...TFerguson
Jul 23, 2003 1:23 PM
1 - Use the pulley off of a Travel Agent (or something similar) and somehow connect it to the screw that holds the bottom braclet cable guide. Then run the your cable down through the pulley and back up to the deraileur.

2 - Install a cable stop on your down tube and a cable guide under the bottom bracket (if these aren't already there) and run the cable normally to a bottom pull derailleur.

re: Option #1The Walrus
Jul 23, 2003 1:40 PM
Just like so...
All the answers are hereOffRoadTourer
Jul 23, 2003 5:47 PM
This topic was discussed in depth a few months back

Go to
Jul 23, 2003 7:14 PM
use a MTB front der. They do the trick fine. I don't know about a 52 on a Colnago cx, may be chain line issues. Better ask MAckGoo and Lonefrontranger. LFR runs Campy on her Dreamcross with a Shimano MTB fr. if memory serves me right
If you run STI...CurtSD
Jul 28, 2003 2:57 PM
MTB front deraillers are incompatible with STI shifters (different ratio of cable pull to derailler movement).
If you run STI...atpjunkie
Jul 28, 2003 4:14 PM
not true. before I switched to BarEnds I ran Ultegra STI with XTR top pull FD no trouble. Is actually standard on 2000 Specialized cx bikes.
If you run STI...OffRoadTourer
Jul 29, 2003 8:00 AM
You can run most double cranksets with a MTB derailler but a road triple crankset will not work most of the time. I know this through bitter experience with my XTR.

As discussed in the post I mentioned above, Shimano make a different front derailler to use with MTB rapid fire shifters on flat handlebar road sport bikes. If STI and rapid fire pulled the same amount of cable there would be no need for this front derailler - you could just use any road triple front derailler.

I think it's fair to say that Shimano do not claim any compatibility between STI and MTB front deraillers, but some people get lucky depending on their individual set up.
and againatpjunkie
Jul 31, 2003 5:54 PM
I just saw my friends Morati. (He raced worlds Masters in Europe)
XTR fr. der. with Ult. STI's and he doesn't use a barrel adjuster as I do. these work, I never had any trouble.
Thanks for the Help!hobz
Jul 24, 2003 7:49 AM
9s XTR front derailleurs were made for 48t rings (nm)weiwentg
Jul 24, 2003 11:44 AM