Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10
  1. #1
    Senior Member radiocontrolhea's Avatar
    Join Date
    Sep 2008
    Posts
    196
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    sugino 75 with hatta swan or sugino 75 bb? with dura ace hubs. (NJS)

    Ok i'm having a really hard time figuring this out. I just recently purchased an Alien frameset and i'm now looking to purchase a crankset, bottom bracket and hubs to obtain a perfect chainline. I have searched and done research on sheldon's site as well as these forums and cannot figure it out.

    I am going to use sugino 75 cranks but have realized that hatta swan BB are 109mm long and the Sugino 75s are 109.5mm.

    I am thinking of going with dura ace hubs, but will this provide for a perfect chainline?

  2. #2
    Painfully average. calv's Avatar
    Join Date
    Jun 2010
    Location
    Oakland/Davis, CA
    My Bikes
    all city mr pink
    Posts
    2,536
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    .5mm difference? Don't worry about it, man.
    Quote Originally Posted by ThisJauntyGent View Post
    The stories about the smell are absolutely true: straight elephant dick.
    All City Mr Pink

  3. #3
    Senior Member mihlbach's Avatar
    Join Date
    Dec 2005
    Location
    Long Island, NY
    Posts
    6,364
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    You are talking about 0.5mm. Thats barely macroscopic. Cogs vary in thickness more than that. Plus its not likely that your frame is aligned correctly to that degree of perfection. When you pedal your bb sways back and forth much more than that. Worrying about half a mm chainline difference is pointless.

  4. #4
    Veteran Racer TejanoTrackie's Avatar
    Join Date
    Jul 2009
    Location
    Ciudad de Vacas, Tejas
    My Bikes
    28 frames + 73 wheels
    Posts
    7,741
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes, and furthermore, over time the crank will pull inward on the square taper spindle as it is repeatedly removed and
    retightened, changing the chainline. Far more important than exact spindle length is that the correct taper type be used, which in this case should be ISO.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  5. #5
    Senior Member radiocontrolhea's Avatar
    Join Date
    Sep 2008
    Posts
    196
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i guess wehre i'm going from here is i'd like to understand the concept of it.

  6. #6
    Senior Member
    Join Date
    Aug 2009
    Location
    spfd mo
    My Bikes
    big block
    Posts
    486
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The concept is the spindles being such a small difference in length basically means they are about the same once on and in use
    Quote Originally Posted by 91MF View Post

    i guess if you were really bored and high you might build something like this. i would choose masturbating. or eating doritos.
    http://www.pedalroom.com/member/calvintodd

  7. #7
    Bastard of Reality Scrodzilla's Avatar
    Join Date
    May 2009
    Location
    San Diego, CA
    Posts
    24,288
    Mentioned
    24 Post(s)
    Tagged
    2 Thread(s)
    Quote Originally Posted by radiocontrolhea View Post
    i guess wehre i'm going from here is i'd like to understand the concept of it.
    The "concept" of .25mm per side making no difference at all isn't really difficult to understand.

  8. #8
    Senior Member radiocontrolhea's Avatar
    Join Date
    Sep 2008
    Posts
    196
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Found out that both these bottom brackets are practically identical with a spindle length of 109mm. The source I used had posted a spindle length of 109.5mm for the SG75 BB. Guess this setup with either bottom bracket will result in a 42mm chainline up front.

  9. #9
    Bastard of Reality Scrodzilla's Avatar
    Join Date
    May 2009
    Location
    San Diego, CA
    Posts
    24,288
    Mentioned
    24 Post(s)
    Tagged
    2 Thread(s)
    Do you hear that? Baby Jesus has stopped crying!

  10. #10
    Senior Member seau grateau's Avatar
    Join Date
    Sep 2009
    Location
    LA
    My Bikes
    Shogun Selectra (geared), Affinity Lo Pro (fixed)
    Posts
    5,526
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Sure.
    Quote Originally Posted by adriano View Post
    thanckx.
    Quote Originally Posted by Nagrom_ View Post
    "I made love to your mother dozens of times last week, and she doesnt know what a worn chain ring looks like"

Posting Permissions

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