Advertise on Bikeforums.net



User Tag List

Results 1 to 8 of 8
  1. #1
    Member
    Join Date
    Dec 2007
    Posts
    44
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    replacing cup & bearing BB w/ a cartridge BB

    Can you advise me on the correct bottom bracket size I need? I've replaced the original cup & bearing BB with a cartridge BB. I purchased a Tange BB 107 and it's too short on the right by 3mm. It's perfect on the left side. I need to push the right side out by 3mm so that the crank doesnt hit the frame. I'm using an old 80s Sugino double-ring crank 144 BCD. This is for a fixie conversion.

    Do cartridge BBs come with varying legnths for the right spindle arm? Should I put a few 1mm BB spacers on the right side?

    I'm hoping that I wont have to resort to going back to the oldschool cup & bearing BB.

    Here's a picture of what's going on.

  2. #2
    Senior Member
    Join Date
    Aug 2007
    Posts
    95
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    How is the chainline right now? Is it perfect but with clearance issues?

  3. #3
    Cornucopia of Awesomeness baxtefer's Avatar
    Join Date
    Oct 2004
    Location
    not where i used to be
    Posts
    4,847
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    107 + 2*3=113mm
    {o,o**
    |)__)
    -"-"-

    O RLY?

  4. #4
    ¡Senor Member! time bandit's Avatar
    Join Date
    Jul 2007
    Location
    South Philly
    Posts
    1,710
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ^your math is impeccable and the solution is correct. just get a 113 bb. (extra 3 mm on both sides)
    Enjoy!

  5. #5
    Member
    Join Date
    Dec 2007
    Posts
    44
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    chainline is perfect. i guess i'll need to push the crank out 1-2mm to distance the spider from the stays without affecting the chainline too much.

  6. #6
    Senior Member BizzaroSteve's Avatar
    Join Date
    Sep 2007
    Location
    Ottawa
    Posts
    104
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm just gonna throw it out there that you might have a case of mismatched tapers (JIS crank on an ISO BB) there... not the end of the world, but you might be better off matching tapers. This will move your chain out approx. 4.5 mm according to sheldon.

    I had a mismatch problem and it looked identical to that setup.

    Edit: Tange is JIS from the looks of it so wtf do i know. Still might be something to look into though.
    "All opinions are not equal. Some are a very great deal more robust,
    sophisticated and well supported in logic and argument than others."
    - Douglas Adams -


  7. #7
    Senior Member
    Join Date
    Sep 2006
    Location
    Van BC
    Posts
    3,745
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    To gain a little clearance while running the ring on the outside, you can file down those little horizontal tabs that the top arrow is pointing at in your pic there. I did this on my 600 cranks and it worked fine.

  8. #8
    Member
    Join Date
    Dec 2007
    Posts
    44
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for your input everyone. this forum is quite helpful.

Posting Permissions

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