Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Disraeli Gears Charles Wahl's Avatar
    Join Date
    Jul 2007
    Location
    NYC
    My Bikes
    Riding: 1960s Falcon commuter; Queued: 1977 Bob Jackson, 1983 Serotta Club Special, 1984 Motobécane Team Champion, 1983 Guerciotti SLX, 1974 Harding (like Holdsworth Pro), 1974 Peugeot PX10LE, 1970s Jeunet Franche-Comté, 1974 Raleigh International
    Posts
    3,009
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Tips for front derailler adjustment?

    Campy Super Record clamp-on front derailler on Campy SR 52/42 chainrings. recently I tore the bike down completely, including removing the derailler. I remounted it following the advice on Park's website, leaving about 1mm clearance between the bottom of the outside flange and the chainwheel, and the flange is parallel to the chainwheel (can't remember exactly how it was originally!). I seem to be having trouble going from 42 to 52, none at all the other way. It helps if I only pedal lightly while shifting, but still it might take 2 or even 3 seconds of chattering before it climbs aboard.

    Any suggestions? I know that I said I like primitive in another thread, but it seems to me that it was better before the overhaul.

  2. #2
    Banned
    Join Date
    Jan 2007
    Posts
    5,285
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the chain worn? Or maybe the chain rings?

    Other than that you may want to try adjusting the angle that the dérailleur sits, I've had good luck having the front of the dérailleur slightly 'toed in'.

    I'm grasping at straws here, hopefully someone more knowledgeable will chime in.

  3. #3
    Freewheel Medic pastorbobnlnh's Avatar
    Join Date
    Oct 2005
    Location
    Trying to Ride in the NH Mountains!
    My Bikes
    Vintage Schwinns, Classy Cannondales, & an '83 Santana Tandem
    Posts
    9,169
    Mentioned
    11 Post(s)
    Tagged
    0 Thread(s)
    Could the cable not be as tight as it could be and thus you are losing some of the needed travel in and out? The other thought, of course, has to do with adjusting the high limit screw. Even just a little tweak around the seat tube could cause the difference.
    Bob
    Dreaming of Summertime in NH!

    Visit my websites:
    FreeWheelSpa.com orpastorbobnlnh.com

  4. #4
    juneeaa memba!
    Join Date
    Oct 2003
    Location
    boogled up in...Idaho!
    My Bikes
    Crap. The box is not big enough...
    Posts
    5,611
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    and the other variable is the clocking of the derailleur cage plates to the chainring. I usually set the inner cage plate parallel to the chainring, to give it a better push. my only exception is when the chainline is screwed up and I need to swing the cage in or out a little to accommodate the out of line shifts.

    It'd be interesting to see how others do this - I arrived at this method just by trial and error. There very well may be a better way to set the derailleur.

  5. #5
    Disraeli Gears Charles Wahl's Avatar
    Join Date
    Jul 2007
    Location
    NYC
    My Bikes
    Riding: 1960s Falcon commuter; Queued: 1977 Bob Jackson, 1983 Serotta Club Special, 1984 Motobécane Team Champion, 1983 Guerciotti SLX, 1974 Harding (like Holdsworth Pro), 1974 Peugeot PX10LE, 1970s Jeunet Franche-Comté, 1974 Raleigh International
    Posts
    3,009
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Chain is not worn, and the chainwheel teeth are in good shape. I think that I'll put a bit of toe-in in the outer plate and try that. The inner plate is "toed-out" with respect to the outer one; maybe too much so in my case.
    Thank ye,

  6. #6
    Who cares, just ride it!
    Join Date
    Jun 2006
    Location
    Melbourne
    My Bikes
    1992ish Davidson Impulse, 1981 Apollo Gran Sport SS, 2006 Salsa Las Cruces, 2010 Soma Double Cross
    Posts
    989
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If I can't get a front derailleur to shift well - after checking the usual variables like height, angle, cable tension etc. - I try toeing it in, but typically with the rear of the plates slightly more towards the frame. Sometimes this works wonders...
    N-1 is my long-term goal

Posting Permissions

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