Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Member
    Join Date
    Apr 2009
    Location
    Seoul
    Posts
    39
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    bottom bracket question~

    Hello.

    Ive been trolling this site for years and have read alot of good tips and advice but ive run into a question where I needed to post.

    I have a 2010 gary fisher rail super 9speed and I need to replace the bottom bracket. The part is

    The Vero double cranksets use a JIS (Japanese Industrial Standard) square taper spindle bb and the length is @ 103mm.
    BB7420ST Cartridge BB
    JIS 68x103mm
    M8 Bolts

    I guess I can order the part from full speed ahead but since Im buying a new one anyway, I wanted to upgrade to something better.
    my question is, what specs has to be same as the one listed above. I'm guessing it has it be a 69x103mm in size and a square taper.
    Is that all I need to match??? are bbs and cranksets tied together or as long as its square taper im good?

    thanks in advance.

  2. #2
    Goes to 11. striknein's Avatar
    Join Date
    Oct 2010
    Location
    Wichita, KS, USA
    My Bikes
    2008 Redline Monocog 29er, 2012 Retrogression Excel, 1983 Specialized Stumpjumper Sport XT, 1986 Raleigh Technium 460, 1965 Schwinn Typhoon
    Posts
    2,512
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    As long as it's 68x103mm JIS taper, you'll be fine.
    Quote Originally Posted by Nagrom_ View Post
    I actually just run calipers. Levers are for scrubs.

  3. #3
    Can'tre Member 3alarmer's Avatar
    Join Date
    Nov 2010
    Location
    POSAW
    My Bikes
    Bicycles ? We don' need no steenkin' bicycles.
    Posts
    4,767
    Mentioned
    26 Post(s)
    Tagged
    3 Thread(s)
    You can get by with a slightly different spindle length. It can be a couple of mm longer,
    or sometimes you can even get by with shorter, depending on clearances.

    ISO Arms on JIS spindles work fine all the time, but it moves your arm and rings
    outboard a little bit, thus the chain line moves outboard.

    You can't always mount a JIS tapered crank arm on an ISO spindle, but sometimes
    you can and it works fine. Every variation from your original usually moves your
    chain line a little, sometimes a lot, sometimes too much.

    Look here:ISO/J.I.S. Interchangeability

    EDIT: If you really want to upgrade and have some cash to drop,
    call the people at Phil Wood and ask them what they would recommend.

    But you're gonna drop a hundred bucks plus by the time you're done.
    Last edited by 3alarmer; 11-21-12 at 10:15 PM.
    Quote Originally Posted by Al Dvorin
    Ladies and gentlemen, Elvis has left the building. Thank you and goodnight

  4. #4
    Member
    Join Date
    Apr 2009
    Location
    Seoul
    Posts
    39
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for the advice.... which leads me to my second question.

    from amazon, i have a few options brands
    sunlight $14
    origin8 alloy $36
    sugino $35
    ird $34

    I have no idea what the price range for bbs are... any brand recommendations? thanks

  5. #5
    Senior Member
    Join Date
    Feb 2009
    Posts
    3,803
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by iFeelu View Post
    thanks for the advice.... which leads me to my second question.

    from amazon, i have a few options brands
    sunlight $14
    origin8 alloy $36
    sugino $35
    ird $34

    I have no idea what the price range for bbs are... any brand recommendations? thanks
    Go with the Sugino. I have Phils and am not too impressed with them.
    Found this one. http://www.biketoolsetc.com/index.cg...r-Spindle&q=&s=
    Last edited by davidad; 11-22-12 at 07:43 AM. Reason: added site

  6. #6
    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
    24,797
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by davidad View Post
    Go with the Sugino.
    +1 The minor cost difference is worth it.

Posting Permissions

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