Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Senior Member Pukeskywalker's Avatar
    Join Date
    Apr 2009
    My Bikes
    Cannondale T1000
    Posts
    174
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Anybody run a 1:1 actuation ratio rear derailluer with a dt/barcon friction shifter?

    I'm considering getting a SRAM X9 derailleur for a touring build, but the 1:1 actuation ratio concerns me.

    I've read in other posts that the derailleur might not be able to move through the entire cassette with a friction shifter. Has anybody successfully run a set-up like this?

    If it is a concern, I'll go with a Deore XT , but I'd like to get SRAM a try if it's an option.

  2. #2
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    35,762
    Mentioned
    15 Post(s)
    Tagged
    0 Thread(s)
    Not me..

    Question is WHY? 1:1 stuff is MTB is it not? adopting a brake cable travel multiplier,
    aka travel agent may be a kludge.

    As is adopting trekking bars so you can use the whole SRAM MTB set.

    the more likely to work is the latter ..

  3. #3
    biked well well biked's Avatar
    Join Date
    Jul 2005
    Posts
    6,712
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by fietsbob View Post
    ......1:1 stuff is MTB is it not? ........
    Regarding 1:1 cable pull ratio for SRAM mtb and road groups, no, 1:1 is not just for their mtb components. From the SRAM website: "When we launched our road technology from scratch we reapplied our MTB proven SRAM 1:1 actuation ratio (shifter cable travel : derailleur movement) for 10 speed rear shifting."

    To the OP, sorry, I can't answer your question, I've never used a friction shifter with a SRAM 1:1 rear derailleur.
    Last edited by well biked; 03-28-11 at 12:46 PM.

  4. #4
    Insane Bicycle Mechanic Jeff Wills's Avatar
    Join Date
    Mar 2008
    Location
    other Vancouver
    Posts
    6,418
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Pukeskywalker View Post
    I'm considering getting a SRAM X9 derailleur for a touring build, but the 1:1 actuation ratio concerns me.

    I've read in other posts that the derailleur might not be able to move through the entire cassette with a friction shifter. Has anybody successfully run a set-up like this?

    If it is a concern, I'll go with a Deore XT , but I'd like to get SRAM a try if it's an option.
    There's been a couple people who have done this on the Bentrideronline forum. It requires a Travel Agent to get enough cable pull and you'll have to use friction shifting (no indexing), but it's do-able.
    Jeff Wills

    All my bikes.

  5. #5
    Senior Member
    Join Date
    Jul 2009
    Posts
    90
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you're thinking bar-ends or thumbies, either of the TT shifters will suffice. Pauls has the thumbie mounts. I haven't seen any downtube fitments yet.

  6. #6
    Fail Boat crewman
    Join Date
    Feb 2011
    Location
    PDX
    My Bikes
    Reynolds 853 Jamis Quest 1990s
    Posts
    674
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    True Friction shifters like Sachs Huret are "dumb". That is they have no notion about indexing or ratios. Just pull or push and they should work cause all they do is tighten or slacken the tension on the rear d spring. I have never run a setup like sram, but my LBS guy tells me that I can frankenbike my bike with a campy rear and a shimaNO front.

Posting Permissions

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