Advertise on Bikeforums.net



User Tag List

Results 1 to 4 of 4
  1. #1
    Your Recovery Ride Buddy krazygl00's Avatar
    Join Date
    Jan 2010
    Location
    24 879.6396 miles behind you
    My Bikes
    2000 Serotta Classique, 1999 Serotta C3S Atlanta, 2004 Kona Jake the Snake, 2009 Kona Paddywagon, 2006 Kona Kula, 1980's Fuji Pursuit TT Fix/SS conversion, 1980's Torpado Super Strada, Bridgestone RB1 Synergy
    Posts
    436
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Shimano "B" Cable Position For Rear Derailleur

    I want to change my STI shifters from 9spd Ultegra to 10spd (because the ergonomics are better), but I'm not sure I want to go ahead with a complete conversion to 10spd including cassette, chain, then possibly front rings if the system is worn, etc.

    Shimano systems can use an alternate "B" position for the derailleur cable which changes the cable-gain and allows "N" shifters to be used with "N-1" drivetrains. Therefore 10spd shifters can be used with 9spd drivetrain, 9spd shifters w/ 8spd drivetrain, etc.

    I was thinking of trying this. Does this actually work? Is the shift quality good? Or am I going to wind up completely pissed off?
    Quote Originally Posted by patentcad View Post
    Why are you all too fat for this sport?

  2. #2
    Member Eprobungs's Avatar
    Join Date
    May 2009
    Posts
    37
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by krazygl00 View Post
    Does this actually work? Is the shift quality good? Or am I going to wind up completely pissed off?
    I've tried that on a 9sp shifter + 8sp cassette.
    It worked and shifted perfectly.

    However, the set-up was a bit tricky.
    Since, there is no cable-groove cut on the RD for the
    alternate position it took me a couple of tries to get the
    cable onto the perfect position.

    Tip: Once you nail down the cable position,
    mark the spot and cut a groove with a
    file or a hacksaw to take the hassle
    out of future cable changes.

  3. #3
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,295
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by krazygl00 View Post
    I want to change my STI shifters from 9spd Ultegra to 10spd (because the ergonomics are better), but I'm not sure I want to go ahead with a complete conversion to 10spd including cassette, chain, then possibly front rings if the system is worn, etc.

    Shimano systems can use an alternate "B" position for the derailleur cable which changes the cable-gain and allows "N" shifters to be used with "N-1" drivetrains. Therefore 10spd shifters can be used with 9spd drivetrain, 9spd shifters w/ 8spd drivetrain, etc.

    I was thinking of trying this. Does this actually work? Is the shift quality good? Or am I going to wind up completely pissed off?
    Why bother.

    You can get the adpater that changes the pull *perfectly* without any hack modifications or alternate clamping positions that yield **** performance for $40. Go buy it.

    http://jtekengineering.com/shiftmate.htm
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    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
    25,769
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    +1 on the J-tek shiftmate. I used one to run a 9-speed Shimano cassette and Shimano rd with 10-speed Campy Ergos and am currently using one with a 10-speed Shimano cassette and Shimano rd with the same Campy Ergo brifters. The shifting is perfect.

    BTW, since brifters are by far the most expensive single item in any upgrade, why not just go for a 10-speed cassette and chain too. If your chainrings need replacing, they need replacing. The change to 10-speed won't have any effect on that either way.

Posting Permissions

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