Advertise on Bikeforums.net



User Tag List

Results 1 to 17 of 17
  1. #1
    Hi. I'm in Delaware. Robbykills's Avatar
    Join Date
    Nov 2004
    Location
    Newark, Delaware
    My Bikes
    1985 Schwinn Voyageur (Touring, Commuter), LMNO custom track (www.lmnocycles.com), 1999 Gary Fisher Mt. Tam SS, 2003 Motobecane Mirage, IRO Group Buy Rob Roy cruiser-fied, Dirt Research Kobuck (pedicab equipped)
    Posts
    509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shimano Deore Derailleur, Sora Brifters

    So I have a Shimano Deore derailleur sitting around (a triple purchased in 2005), if I hook it up to a set of 2005 Sora STI shifters will it be all weird? I.e. the backwards shifting or will it be alright?

  2. #2
    Senior Member caotropheus's Avatar
    Join Date
    Mar 2005
    Location
    Portugal-Israel
    Posts
    861
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I suppose the combination will work. Try it and check if it works.

  3. #3
    Senior Member
    Join Date
    May 2006
    Location
    Denver, CO
    Posts
    751
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just to clarify, when you say "backwards shifting" you are describing a "low normal" *rear* derailleur?

  4. #4
    Senior Member MrCjolsen's Avatar
    Join Date
    Nov 2004
    Location
    Davis CA
    My Bikes
    Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
    Posts
    3,954
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Derailleurs do not care what or who is pulling on thier cables. They just do what they are told.

  5. #5
    Senior Member
    Join Date
    May 2006
    Location
    Denver, CO
    Posts
    751
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MrCjolsen
    Derailleurs do not care what or who is pulling on thier cables. They just do what they are told.
    So a shimano rear derailleur is going to work just fine with campy levers?

  6. #6
    Small Member maddmaxx's Avatar
    Join Date
    Nov 2003
    My Bikes
    Leader home built hardtail, Diamondback Response
    Posts
    7,044
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)
    If I read your post correctly I think you are talking about a front derailleur. If so, it will not work properly with the Sora brifters and the pull ratio is different between the Shimano Road and Mountain Groups. You will need a road front to work with Sora.

    If you look at a mountain front and a road front, the upper half of the pull lever where the cable attaches is almost twice as long as the equivalent lever on a road derailleur.

    Additionally, the mountain derailleur will foul the front edge of the rear wheel on most road frames due to the narrow clearance between the seat tube and the tire. Road derailleurs work outboard of the centerline and do not get between the frame and the tire.

  7. #7
    cs1
    cs1 is offline
    Senior Member cs1's Avatar
    Join Date
    Feb 2004
    Location
    Clev Oh
    My Bikes
    Specialized, Schwinn
    Posts
    6,130
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Proximo
    So a shimano rear derailleur is going to work just fine with campy levers?
    Sure it will move just not where you want it to. I think you understood the original post. He was asking if Rapid Rise derailleurs would work with a Shimano road shifter. The answer is the rear will work fine. You need a Shimano road specific front to use the Sora front brifter.

    Tim
    Last edited by cs1; 02-08-07 at 10:18 AM.
    1999 Waterford RSE-11, 1995 Waterford 1200, 1989 Specialized Rockhopper Comp
    1989 Raleigh Technium, 1989 Schwinn Traveler, 1986 Specialized Rockhopper
    1984 Specialized Stumpjumper, 1986 Specialized Stumpjumper and just way too many projects to list.

  8. #8
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,806
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by maddmaxx
    If you look at a mountain front and a road front, the upper half of the pull lever where the cable attaches is almost twice as long as the equivalent lever on a road derailleur.

    Additionally, the mountain derailleur will foul the front edge of the rear wheel on most road frames due to the narrow clearance between the seat tube and the tire. Road derailleurs work outboard of the centerline and do not get between the frame and the tire.
    This is an interesting point and not limited to MTB front derailleurs. Shimano's 8-speed RX-100, 105 and Ultergra road fds had actuating arms (distance from the pivot to the cable anchor bolt) much longer than their 9 and 10-speed fds. I ran into the rear tire clearance problems when I first installed a 105 8-speed triple fd on my '96 Litespeed. I had to use a band-on fd and a 115 mm bottom bracket (118 was recommended) to keep the arm from hitting the rear tire when in the big chainring.

    When I finally upgraded to 9-speed the problem disappeared completely.

  9. #9
    Small Member maddmaxx's Avatar
    Join Date
    Nov 2003
    My Bikes
    Leader home built hardtail, Diamondback Response
    Posts
    7,044
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)
    Did those 8 speed derailleurs have a bend in the actuator arm. The reason I ask is that I am sitting here looking at the more modern "flatbar" front derailleur. It has the long arm of an MTB derailleur but the arm is almost straight up and down so that the mechanism still stays outboard of the tire. I wonder if this derailleur would be a fix for the situation that you describe.
    I wish we could compile a table of all of the mix and match variations of Shimano FD's ratio's and matching levers. Seems like this question comes up often.

  10. #10
    Senior Member
    Join Date
    May 2006
    Location
    Denver, CO
    Posts
    751
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by cs1
    Sure it will move just not where you want it to. I think you understood the original post. He was asking if Rapid Rise derailleurs would work with a Shimano road shifter. The answer is the rear will work fine. You need a Shimano road specific front to use the Sora front brifter.

    Tim
    Actually, I was just responding to MrCJolson's obviously silly statement that derailleur's don't care what's tugging them. They do if you want them to shift correctly.

  11. #11
    semifreddo amartuerer 'nother's Avatar
    Join Date
    Oct 2004
    Location
    Northern CA
    My Bikes
    several
    Posts
    4,599
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If the OP could clarify whether the Deore in question is a front or rear derailer, and if rear, whether it is Rapid Rise or not, his question could be answered quite easily and without dragging Campy into it.
    Can you pass the test?
    Yield to Life.

  12. #12
    No one carries the DogBoy
    Join Date
    Feb 2004
    Posts
    2,154
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    if you are asking about the rear, all modern Shimano Derailleurs use the same pull ratio, so if you use 7/8 or 9 speed shifters with your Deore derailleur it should work fine. as long as the shifter/cassette matches. For example I use a 2006 deore XT low normal derailleur with my 7 speed system...the cassette matches the shifter. On my touring bike I use an XT derailleur with my 105 brifters and it works fine too.

    To the other question, yes, Shimano Derailleurs work fine with campy shifters, so long as you adjust the pull ratio via a jtek shiftmate. Lots of users on this forum do this. Campy shifters work well with any front derailleur, since the shifters are essentially friction based.

  13. #13
    me have long head tube TallRider's Avatar
    Join Date
    Oct 2005
    Location
    Chapel Hill, NC
    Posts
    4,088
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    DogBoy has it right. I kept reading down the thread hoping that someone would summarize what's up, and he did. So thanks.

    This is assuming the OP is talking about a rear derailler.
    Shimano's front deraillers have different cable-pull ratio in road groups than in mountain groups.

  14. #14
    Road Runner DougG's Avatar
    Join Date
    Sep 2003
    Location
    Rochester Hills, MI
    My Bikes
    Specialized Sequoia, Specialized Crosstrail, Cannondale Synapse Carbon
    Posts
    970
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was about to make a similar post, but I think this thread answers my question. I currently have a Sora (triple) FD with ST-R500 shifters. I'm thinking of upgrading to a 105 FD, and I'm now assuming that this is basically a no-brainer -- correct?

    I'm running 8 speeds in the rear and the 105 FD is listed as for 9/10 gearing, but I also assume that the FD doesn't really care what cassette you've got behind it.

  15. #15
    Small Member maddmaxx's Avatar
    Join Date
    Nov 2003
    My Bikes
    Leader home built hardtail, Diamondback Response
    Posts
    7,044
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)
    DougG...your setup will be fine.

  16. #16
    Hi. I'm in Delaware. Robbykills's Avatar
    Join Date
    Nov 2004
    Location
    Newark, Delaware
    My Bikes
    1985 Schwinn Voyageur (Touring, Commuter), LMNO custom track (www.lmnocycles.com), 1999 Gary Fisher Mt. Tam SS, 2003 Motobecane Mirage, IRO Group Buy Rob Roy cruiser-fied, Dirt Research Kobuck (pedicab equipped)
    Posts
    509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    actually I'm talking a rear derailleur. And I had read that it made it shift backwards (i.e the lever for a bigger cog dropped it into lower cogs and vice versa) but in retrospect that may just be for the front. and now that I think about it my road downtube shifters worked with the same MTB derailleur. Sorry for the confusion and thanks for the advice!

  17. #17
    cs1
    cs1 is offline
    Senior Member cs1's Avatar
    Join Date
    Feb 2004
    Location
    Clev Oh
    My Bikes
    Specialized, Schwinn
    Posts
    6,130
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Proximo
    Actually, I was just responding to MrCJolson's obviously silly statement that derailleur's don't care what's tugging them. They do if you want them to shift correctly.
    I stand corrected.

    Tim
    1999 Waterford RSE-11, 1995 Waterford 1200, 1989 Specialized Rockhopper Comp
    1989 Raleigh Technium, 1989 Schwinn Traveler, 1986 Specialized Rockhopper
    1984 Specialized Stumpjumper, 1986 Specialized Stumpjumper and just way too many projects to list.

Posting Permissions

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