Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    BeaverTerror Yan's Avatar
    Join Date
    Jan 2006
    Location
    Shanghai, China
    My Bikes
    2013 True North custom touring; 2009 Unicycle.com Club Uni; 1989 Miele Tivoli; 1979 Colnago Sport
    Posts
    1,542
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Hollowtech II spacer placement?

    I am converting my Surly Cross Check fixed gear into a touring bike. I have a Shimano 105 triple (FC-5603) crankset which currently has one spacer under the right adapter and none under the left. This gives me a straight chainline for the fixed setup (but with cranks offset from centreline).

    The bike is getting 3x9 gears, with a standard 9 speed mountain cassette on a 135mm hub in the rear. The bottom bracket shell width is 68mm. What is the correct bottom bracket spacer configuration in this situation? I've looked through the Shimano documents but they are unhelpful.
    Yan

    2013 True North custom touring; 2010 Novara Randonee; 2009 Unicycle.com Club 24"; 1989 Miele Tivoli; 1979 Colnago Sport

  2. #2
    Senior Member Torchy McFlux's Avatar
    Join Date
    Sep 2007
    Location
    Vancouver
    My Bikes
    NOYB
    Posts
    1,348
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Shimano triple road cranks should always have a distance of 45mm between the center of the seatttube and the middle of the middle chainring.
    By Shimano's tech docs (http://techdocs.shimano.com/media/te...9830646763.pdf) it looks like you should have that spacer on the left side.

  3. #3
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Posts
    7,368
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Same for the Shimano Ultegra Hollowtech II. The spacer (only comes with one) goes on the left-side after the external-bearing is torqued on.
    Quote Originally Posted by Cateye View Post
    Only panthers007 is stupid enough to believe that this is a good idea.

  4. #4
    BeaverTerror Yan's Avatar
    Join Date
    Jan 2006
    Location
    Shanghai, China
    My Bikes
    2013 True North custom touring; 2009 Unicycle.com Club Uni; 1989 Miele Tivoli; 1979 Colnago Sport
    Posts
    1,542
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If there is no spacer on the drive side, what keeps the chainline constant when the same parts are moved to a 73mm bottom bracket?
    Yan

    2013 True North custom touring; 2010 Novara Randonee; 2009 Unicycle.com Club 24"; 1989 Miele Tivoli; 1979 Colnago Sport

  5. #5
    Shop Wench
    Join Date
    Mar 2009
    Location
    California
    Posts
    284
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Yan View Post
    If there is no spacer on the drive side, what keeps the chainline constant when the same parts are moved to a 73mm bottom bracket?
    These parts won't work with a 73mm BB shell.

  6. #6
    Great State of Varmint Panthers007's Avatar
    Join Date
    Sep 2008
    Posts
    7,368
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That's not quite correct. You'd need a Hollowtech II for Italian spacing:

    http://harriscyclery.net/itemdetails.cfm?ID=2483
    Quote Originally Posted by Cateye View Post
    Only panthers007 is stupid enough to believe that this is a good idea.

Posting Permissions

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