Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    1,2,3,4... DeeDeeRamone's Avatar
    Join Date
    Jul 2007
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Tightening bottom bracket cups

    I have a clicking sound that I've pinpointed to the bottom bracket cups being loose (thanks to Sheldon Browns' site). Im unsure however about how to tighten it.
    It needs to be tightened on the right side, which is a pretty tight fit being next to the chain rings.
    Do I need to take the cranks and chain wheel off or can I tighten it without doing so?
    Also, any tips for what tool to use?
    Thanks.

  2. #2
    Senior Member barba's Avatar
    Join Date
    Nov 2005
    Posts
    4,083
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What kind of bottom bracket is it?

  3. #3
    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
    25,649
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    If it's a cartridge unit, you will have to remove the crank to get to it.

    Also, assuming the frame is English threaded (1.37"x24 TPI) as most modern frames are, the drive side is left-hand threaded so it tightens counterclockwise, the reverse of "normal".

  4. #4
    1,2,3,4... DeeDeeRamone's Avatar
    Join Date
    Jul 2007
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a Diamondback with a cartridge BB.
    Thanks for the info HillRider, I knew that the pedal was a reverse thread, but I had no idea that the crank arm was too.
    I really dont want to take it to a shop, so Im hoping I can fix it myself. Do you have any advice for someone who has never attempted a job like this on bike? I want to do it right the first time.

    Thanks for your help.

  5. #5
    rebmeM roineS JanMM's Avatar
    Join Date
    Jan 2006
    Location
    Indiana
    My Bikes
    RANS V3, RANS V-Rex, RANS Screamer
    Posts
    11,620
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    The RH cup is reverse thread, not the crank arm.

  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
    25,649
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    You will need the specific bottom bracket tool. The most commonly available one is the Park BBT-2 that fits all Shimano cartridge square taper and Octalink bb's and almost all ISIS bb's.

    Remove the drive side crank arm and tighten the drive side of the cartridge using the BBT-2 counterclockwise. The recommended torque is 300 - 400 inch-pounds which is way more than you'd think.

    Actually the crank arm itself isn't left-hand threaded and both the fixing bolts and crank puller threads are "normal". The bottom bracket drive side is left-hand threaded as is the non-drive side pedal. Confusing huh?

  7. #7
    Senior Member
    Join Date
    Sep 2005
    Location
    Michigan
    My Bikes
    Trek 730, Bike Friday NWT, Brompton M6R, Trek 830, Dahon HAT 060, ...
    Posts
    1,438
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by HillRider View Post
    Remove the drive side crank arm and tighten the drive side of the cartridge using the BBT-2 counterclockwise. The recommended torque is 300 - 400 inch-pounds which is way more than you'd think.
    To prevent BBT-2 from falling out from the ridges in the cup, use a bolt with a nut and a fender washer. Screw the bolt into the spindle through BBT-2, with the nut and washer staying outside of BBT-2. Tighten the nut until BBT-2 presses firmly against the cup.

  8. #8
    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
    25,649
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 2_i View Post
    To prevent BBT-2 from falling out from the ridges in the cup, use a bolt with a nut and a fender washer. Screw the bolt into the spindle through BBT-2, with the nut and washer staying outside of BBT-2. Tighten the nut until BBT-2 presses firmly against the cup.
    The bolt has to be M8x1.0mm (a finer than usual thread) for a square taper bb. For an Octalink or ISIS hollow axle bb, use a rear qr skewer to hold the BBT-2 in place.

  9. #9
    Your mom
    Join Date
    Aug 2006
    Posts
    2,546
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I use my crank bolts with a fender to hold the BB tool in place. Just remember to loosen the bolt as you unscrew the NDS cup - I cracked one that way.

  10. #10
    I drink alone
    Join Date
    Feb 2007
    Posts
    34
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Speaking of BB's.... I have a Campy Chorus, used for just 2 seasons so far. How often do these need work, I mean how often should one take it apart, re-lube, grease, whatever? (Barring any accident or riding through flood waters.)
    Thanks.

  11. #11
    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
    25,649
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Old &in the way View Post
    Speaking of BB's.... I have a Campy Chorus, used for just 2 seasons so far. How often do these need work, I mean how often should one take it apart, re-lube, grease, whatever? (Barring any accident or riding through flood waters.)
    Thanks.
    If it's a current Chorus cartridge bb, there is no need for or possibility of maintenance. They are sealed units and nothing is serviceable. You might remove it every couple of years to be sure no water is in the bb shell and to keep the threads clean and lubed but the bb itself need no attention.

    Use it until it feels loose or starts to make a lot of noise then buy a new one. That should be a long time from now.

  12. #12
    Senior Member
    Join Date
    Sep 2005
    Location
    Michigan
    My Bikes
    Trek 730, Bike Friday NWT, Brompton M6R, Trek 830, Dahon HAT 060, ...
    Posts
    1,438
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I do not know about the Chorus BB specifically, but in many taper BBs, once there is a problem, it suffices to replace stock cartridge bearings.

  13. #13
    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
    25,649
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Shimano (other than Dura Ace Octalink) and Campy sealed units, AFAIK, aren't servicable at all. Phil Wood and a few others can have their bearings replaced.

  14. #14
    I drink alone
    Join Date
    Feb 2007
    Posts
    34
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ^ Thanks to all!!!

Posting Permissions

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