Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Junior Member
    Join Date
    Aug 2007
    Location
    Kensington, MD (soon Australia :-)
    My Bikes
    Cyclocross Disc 2006
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Bottom Bracket advice

    Hello,
    The bottom bracket in my Cannondale Cyclocross is starting to make creaking sounds. It is TruVatiV Giga X Pipe. I would like to replace the bearings with ceremic bearings.
    1) Any advice if I should try to replace only the bearings, which means I have to figure how to open the seal. If yes, recomendation of tools.
    2) If I should replace the bottom bracket, do I need to worry about size, or are all the bottom brackets the same size.
    3) Any advise on reasonably priced brand

    Thanks,
    Youssef

  2. #2
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,182
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by yyoussef View Post
    Hello,
    The bottom bracket in my Cannondale Cyclocross is starting to make creaking sounds. It is TruVatiV Giga X Pipe. I would like to replace the bearings with ceremic bearings.
    1) Any advice if I should try to replace only the bearings, which means I have to figure how to open the seal. If yes, recomendation of tools.
    2) If I should replace the bottom bracket, do I need to worry about size, or are all the bottom brackets the same size.
    3) Any advise on reasonably priced brand

    Thanks,
    Youssef
    First of all, ceramic bearings don't make much sense. They shave a tiny amount of total weight, add a LOT to the cost, and a debatable amount of durability. In my opinion they are simply a fad, mostly being pushed by FSA it seems (read this or this for some of the details on ceramic bearings BS).

    Now on to the other questions You should check out the manufacturer's site for more info on your BB: http://www.sram.com/en/truvativ/bott...upsenglish.php

    1) Yours is an outboard-bearing design, rather than a cartridge BB, so it should be possible to replace the bearings only. However, they are sealed cartridge bearings, *not* loose balls. Basically, the bearing comes in a cartridge that looks something like this:

    This is a well-sealed design compared to loose bearing balls, but when it wears out you need to replace the whole cartridge.

    2) Bottom brackets come in a wide variety of diameters/threadings (yours is English-threaded, 68mm), a wide variety of spindle lengths, and a wide variety of crank-spindle interfaces (in your case yours is an outboard-bearing design with the spindle integrated into the crank). However, you can pretty much ignore all that since you only need to replace the bearings

    3) You only need to replace the bearings. You'll have to find out exactly what size the cartridges are, which I couldn't figure out from Truvativ's web site unfortunately. A shop can probably help you out with this and replace the bearings for $10-30 + labor. On the other hand, they are probably standard industrial bearing cartridges, and if you can figure out the right part yourself, you can get them for $5-10 likely.
    Last edited by moxfyre; 08-03-07 at 11:24 AM.
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  3. #3
    Junior Member
    Join Date
    Aug 2007
    Location
    Kensington, MD (soon Australia :-)
    My Bikes
    Cyclocross Disc 2006
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    How..?

    Thanks for the info. It is greatly appreciated.
    Just wondering how did you figure the size 68mm
    I checked http://www.sram.com/_media/techdocs/...aPipe-e-r2.pdf What in the chart indicated the one in my bike?

    Just trying to learn reading this stuff..

    Cheers,
    Youssef

  4. #4
    Elitist Troglodyte DMF's Avatar
    Join Date
    Jun 2006
    Location
    Dallas
    My Bikes
    03 Raleigh Professional (steel)
    Posts
    6,887
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Nothing in that chart. He probably looked it up on the Cannondale site, something you could do yourself.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  5. #5
    A little North of Hell
    Join Date
    Mar 2006
    Posts
    4,294
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    enduro

    Quote Originally Posted by yyoussef View Post
    1) Any advice if I should try to replace only the bearings, which means I have to figure how to open the seal. If yes, recomendation of tools.
    Enduro use to press the bearings in for free if you sent them your cups, I'm not sure if they still do?
    Call them and ask. (877) ENDURO-1

    http://www.enduroforkseals.com/id101.html

    DIY:

    http://www.enduroforkseals.com/siteb...p_by_rwc_f.pdf
    [SIGPIC][/SIGPIC]
    XXXI

  6. #6
    Junior Member
    Join Date
    Aug 2007
    Location
    Kensington, MD (soon Australia :-)
    My Bikes
    Cyclocross Disc 2006
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the pointer.

    Cheers,
    Youssef

  7. #7
    Junior Member
    Join Date
    Aug 2007
    Posts
    14
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    don't forget to get the bottom bracket faced.

Posting Permissions

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