Results 1 to 6 of 6
  1. #1
    mtbr member
    Reputation:
    Join Date
    Oct 2004
    Posts
    4,353

    Derailer Compatibility (a bit off-forum)

    Off-forum, but does anyone know if my road bike 9-speed ultegra derailer will work with a new 10-speed drivetrain?

    My 9-speed stuff is toast, but the derailer is almost new. Would hate to replace it for no good reason.

  2. #2
    *****************
    Reputation: Bikinfoolferlife's Avatar
    Join Date
    Feb 2004
    Posts
    12,379
    Since they basically cover the same range on a cogset I'd think it'd probably work all right, but you'd get better answers on roadbikereview.com...
    "...the people get the government they deserve..."
    suum quique

  3. #3
    Freshly Fujified
    Reputation: Call_me_Clyde's Avatar
    Join Date
    Oct 2004
    Posts
    8,200

    Probably not

    My understanding is that most Shimano rear derailleurs are backward compatible (e.g. 9 speed r/d will work w/ 8 speed cassette, 8 with 7, etc.), but not forward compatible, so my guess would be no. As BikinFool recommended, check with RBR to be sure.

    Bob
    'If Wal-Mart sold parachutes, who would jump?' Frank Havnoonian (quoting his father) Drexel Hill Cyclery

  4. #4
    mtbr member
    Reputation:
    Join Date
    Jul 2004
    Posts
    9
    10 speed chains are narrower than 9/8 speed chains and won't seat properly on the pulleys on the 9 sp derailleur.

  5. #5
    *****************
    Reputation: Bikinfoolferlife's Avatar
    Join Date
    Feb 2004
    Posts
    12,379
    I hadn't thought of the pulleys for the different size chains. I've seen plenty of recommendations here for using 8 speed derailleurs on the 9 speed cassettes/chains, but don't remember a comment about pulleys not matching up...I guess you could change pulleys but that's probably not cost effective.
    "...the people get the government they deserve..."
    suum quique

  6. #6
    mtbr member
    Reputation:
    Join Date
    Jul 2004
    Posts
    9
    Actually, I should retract that last statement I made. The spacing on the chain should be the same, the 10 sp. just has narrower plates. So a 10 sp. chain should work in a 9 sp. derailleur. A 9 sp. chain won't work with 10 sp. components, though. Sorry about that. I spoke too fast.

Similar Threads

  1. Clydesdale forum...or weight loss forum...??
    By sh0rty in forum Clydesdales/Tall Riders
    Replies: 28
    Last Post: 10-24-2004, 11:42 AM
  2. Replies: 14
    Last Post: 05-11-2004, 07:32 PM
  3. HH100X - How's that HA, seems a bit steep?
    By Backmarker in forum Titus
    Replies: 22
    Last Post: 04-15-2004, 07:40 AM
  4. Forum tutorial and FAQ
    By francois in forum Santa Cruz
    Replies: 0
    Last Post: 12-19-2003, 11:09 AM
  5. Forum tutorial and FAQ
    By francois in forum Giant
    Replies: 0
    Last Post: 12-19-2003, 11:09 AM

Posting Permissions

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