Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Senior Member tlippy's Avatar
    Join Date
    Apr 2003
    Location
    Central Oregon
    Posts
    54
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    What is the difference between a double and a triple FD?

    Can anyone tell me the exact difference between a 105 double and triple FD.
    Thanks
    Schwinn Mesa GS MTB,ThudBuster seat post, weighs in @ 34#
    Fuji CX, Rings 30/42/52, Cogs 12-26, weighs in @ 20#

    "Old guys need lower gears"

  2. #2
    Member ncernitz's Avatar
    Join Date
    Mar 2003
    Location
    Wilsonville, Oregon
    My Bikes
    Cannondale Team Saeco, Hand built titanium cross, Co-motion tandem, etc.
    Posts
    15
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Cage width and throw...................

  3. #3
    El Inglés el Inglés's Avatar
    Join Date
    Dec 2003
    Location
    Benidorm , Alicante , ESPAÑA
    My Bikes
    road ( Mendiz ) & mtb (crap )
    Posts
    465
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    a couple of euros .
    ' To Old To Rock ' N ' Roll : To Young To Die '

  4. #4
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,975
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Didn't answer this yeaterday?

    Quote Originally Posted by tlippy
    Can anyone tell me the exact difference between a 105 double and triple FD.
    Thanks
    I took the time yesterday to walk down to my basement where I have two Ultegra equipped bikes. One has a double front derailleur and one has a triple. At a glance I could see two obvious differences:

    The triple derailleur has a much deeper blade on the inner derailleur cage. I assume this is to assist picking the chain up off of the granny ring. The triple cage also droops down farther behind the chainrings. I assume this is to prevent rubbing on the bottom of the derailleur cage if you happen to shift into a little/little gear combination.

    I'm doubtful the throw is any different since they both use the same shifter so the cable pull is identical. I'm also doubtful about cage width since they both use the same chain and a too wide cage isn't going to shift well. The pricing thing is also a little goofy. I have a catalogue that shows a 105 triple derailleur costing more than a 105 double, but the Ultegra triple derailleur costs less than the Ultegra double.

  5. #5
    Member ncernitz's Avatar
    Join Date
    Mar 2003
    Location
    Wilsonville, Oregon
    My Bikes
    Cannondale Team Saeco, Hand built titanium cross, Co-motion tandem, etc.
    Posts
    15
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Retro Grouch,

    Mea Culpa on the erroneous info. Too early in the morning and I was thinking 8 spd. vs. 9 spd.

  6. #6
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    23,975
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Admit it!

    Quote Originally Posted by ncernitz
    Retro Grouch,

    Mea Culpa on the erroneous info. Too early in the morning and I was thinking 8 spd. vs. 9 spd.
    I'll bet you were daydreaming about work insted of concentrating on bicycling stuff like you should. Besides, I thought all the coffee you northwesterners drink was supposed to get you wired earlier.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •