Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-19-04, 10:36 AM   #1
tlippy
Senior Member
Thread Starter
 
tlippy's Avatar
 
Join Date: Apr 2003
Location: Central Oregon
Bikes:
Posts: 54
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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.
Specifically the difference between a FD-5501 and FD-5504?
tlippy is offline   Reply With Quote
Old 02-19-04, 10:59 AM   #2
demoncyclist 
Senior Member
 
demoncyclist's Avatar
 
Join Date: Oct 2002
Location: Medway, MA
Bikes: 2011 Lynskey Sportive, 1988 Cannondale SM400
Posts: 2,694
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
On a triple der, the cage is slightly wider to accomodate the larger difference between the largest and smallest rings.
__________________
DEMON

Satanic Mechanic
STAR 3 Spinning Instructor

2011 Lynskey Sportive (Shimano Ultegra 10s)
1988 Cannondale SM400 (Suntour XC-M 7s)
demoncyclist is offline   Reply With Quote
Old 02-19-04, 05:24 PM   #3
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,744
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
Couple of differences that I can see.

Quote:
Originally Posted by tlippy
Can anyone tell me the exact difference between a 105 double and triple FD.
Specifically the difference between a FD-5501 and FD-5504?
I went down to my shop where I have a pair of Ultegra bikes. One has a double and one has a triple front derailleur. At a glance:
1. The triple cage has a much wider inner blade. I assume that's to lift the chain from the granny to the middle chainring better.
2. The triple cage seems to drop lower in back. I assume that's to prevent rubbing if you are in the granny and one of the smaller rear cogs.
Retro Grouch is offline   Reply With Quote
Old 02-19-04, 07:54 PM   #4
tlippy
Senior Member
Thread Starter
 
tlippy's Avatar
 
Join Date: Apr 2003
Location: Central Oregon
Bikes:
Posts: 54
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks

Thanks guys------that's the info I wanted.
tlippy is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:26 PM.