Advertise on Bikeforums.net



User Tag List

Results 1 to 15 of 15
  1. #1
    Junior Member
    Join Date
    May 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    @008 Trek Madone Bottom Bracket Update...

    Hi all...

    My first post this forum, but I searched to see if this has been talked about much.

    I'm building a new Madone that is coming as a bare frame. The "bottom bracket" no longer exists , per se.
    There are bearing sockets integral to the frame itself. The outside diameter of any bearing used must be 37mm to fit in the socket. The inside diameter will vary with the crankset used. It turns out Trek sells washer/bushing kits for the bigger group manufacturers like Shimano , Campy ,Sram and of course Bontrager. The others BB kits aren't spec'd out or available just yet. FSA is working on ther own "BB90" (90mm wide)kit that will be available in a "few weeks". There are some ceramic bearing manufacturers like Boca , Enduro, et al, who sell cartridge bearings ($60 ish) that will work ,37mm(OD) x 24 or 25(ID) x 6 or 7 deep.The install kits Trek sells must have a tube of socket primer and lock-tite to keep the bearing from spinning in the socket. It seems simple but still has to be done correctly.

    I called Trek, FSA , the bearing guys, and spent waaay too much time on the internet. I think I found out what I needed to know ,so I bought a Campy Ultra Torque crank (it has to have an axle like the newer 2 piece cranks do that take outboard bearings) and some ceramic bearings.

    If I'm off base about any of this, please set the record straight so we can all share accurate information.
    Hopefully it will save somebody the time to research all this stuff.

  2. #2
    Senior Member Matt Gaunt's Avatar
    Join Date
    Oct 2004
    Location
    London, UK
    Posts
    2,217
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Someone educate me on this subject - do Trek make proprietary sized BB shells nowadays? Surely not.

    Is the OP's problem that he/she needs a crank that has an axle long enough to accommodate the 90mm shell?

    Not for the first time on BF, I'm lost.
    Matt
    2010 Kinesis Decade Convert2 Alloy fixie, Miche, Sora Pics soon...
    2008 Kinesis RC2 Scandium/Carbon Road, Ultegra, Ksyrium Elites Pics
    2007 Kinesis Pha5e Scandium hardtail, XT, Revelations, Rockets, M4s, Mavics Pics
    2005 Kinesis RC Scandium/Carbon Road, Ultegra, Ksyrium SLs Pics
    1996 Raleigh Max Steel, Deore XT, SRAM Attack shifters, homemade wheels Pics

  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
    25,477
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    The '08 Trek Madone has a large diameter, wider bottom bracket shell that uses the same bearings as "external bearing" bottom brackets (Shimano Hollowtech II, Campy UT, etc.) but dispenses with the threaded-in cups and accepts the bearing cartridges directly into molded recesses in the shell itself. It's semi-proprietary as it uses the same bearings as the crank makers but doesn't need the bearing cups.

  4. #4
    Junior Member
    Join Date
    May 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The thing that has changed is what the bearings actually sit upon. They are not housed within a bottom bracket that is screwed into the frame. Trek calls them "precision fit sockets" on the frame surface itself.

    You can use the regular bearings that came with the newer two piece cranks , but Trek really dings you for the primer($15) and the loc-tite ($20) as well as a bushing kit for another 20 bucks. Those few trivial install bits add up to guess what?
    Nearly the cost of a bottom bracket............brilliant!

  5. #5
    Newbie
    Join Date
    Jun 2008
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    so what did you end up getting? I just picked up a 08 Madone 6.9 and want ceramic bearings. I am also running Campy Groupo. (currently have the botrager cranks on until I get the ceramics for the campy)
    What size did you end up ordering? 37mm x 25? 6 or 7 mm deep? Did you still need the trek shim/spacer kit? Please help! Thanks

  6. #6
    my brain hurts! fosmith's Avatar
    Join Date
    Mar 2008
    Location
    Oak Knoll
    My Bikes
    Numerous bicycles.
    Posts
    679
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you WILL need the kit from Trek. for ultra torque, you need to loctite the aluminum rings into the shell and then have the spacers inboard of the bearings. wavy spring washer goes on non-drive crank arm. you will need Loctite 638 and the primer. should be able to find that somewhere else, if needed. be sure to let the rings cure for 24 hours before riding.

  7. #7
    Junior Member
    Join Date
    May 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    FO.....

    Excellent scoop there. I am still awaiting my kit from Trek. They just shipped 178 Campy kits last week ,alas ,
    I am about #200 on the list. By their own admission, they misjudged demand on the upper end where Campy has a niche. Most of the kits went to Europe. I bought the Boca 37X27X6 for Ultra Torque. On the Boca site , they list the 37x27x7 specific to the new Madone , I'm not sure, but I belkieve that is really for Shimano/Bontrager/ SRAM.

    One has to wonder about that wavy washer business.....when the tolerances aren't exactly right, does the wavy washer correct things ? Sounds a bit sloppy to me.

    FSA will have their "BB90" kit for their cranks out in about 1 week.

    Jack

  8. #8
    Junior Member
    Join Date
    May 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    One more thing....Trek sells the primer for $14.99 and the loc-tite for $14.99. YES you can find that elsewhere for a lot less.

  9. #9
    Junior Member
    Join Date
    Jul 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the primer and locktite required only if fitting in other bearings / cranks or also for regular maintenance of the original Enduro sealed bearings? After riding my 2008 Madone 5.2 for about a year I was able to simply pop it out without much resistance, regrease it and pop it back in. Am I missing something?

  10. #10
    Senior Member z415's Avatar
    Join Date
    Apr 2006
    Location
    Gainesville/Tampa, FL
    My Bikes
    Trek 1000, two mtbs and working on a fixie for commuting.
    Posts
    2,347
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by HillRider View Post
    The '08 Trek Madone has a large diameter, wider bottom bracket shell that uses the same bearings as "external bearing" bottom brackets (Shimano Hollowtech II, Campy UT, etc.) but dispenses with the threaded-in cups and accepts the bearing cartridges directly into molded recesses in the shell itself. It's semi-proprietary as it uses the same bearings as the crank makers but doesn't need the bearing cups.
    Yup, I was fiddling with one at the Tampa Trek Store and it looks sweet. They told me it was proprietary though. Kind of makes it look like the bb shell and the crank are one.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
    Any good American will watch THIS -and- WHERE WAS MY BIKE MADE?

  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
    25,477
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Here is Lennard Zinn's description of the various mix-and match for the new crank and bottom bracket types:

    http://www.velonews.com/article/8578...k-madone-frame

  12. #12
    my brain hurts! fosmith's Avatar
    Join Date
    Mar 2008
    Location
    Oak Knoll
    My Bikes
    Numerous bicycles.
    Posts
    679
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by vladpop View Post
    Is the primer and locktite required only if fitting in other bearings / cranks or also for regular maintenance of the original Enduro sealed bearings? After riding my 2008 Madone 5.2 for about a year I was able to simply pop it out without much resistance, regrease it and pop it back in. Am I missing something?
    you only need the loctite for the campy adapter rings. Don't loctite the bearings themselves into the frame. not good....

  13. #13
    Death fork? Naaaah!! top506's Avatar
    Join Date
    Nov 2005
    Location
    The other Maine, north of RT 2
    My Bikes
    '71 Gitane Super Corsa, '73 Atala Giro d'Italia, '73 Schwinn Super Sport, '76 Viscount Aerospace Pro, '81 Miyata 710, '81 Lotus Classique, '84 Ross Signature 290s, '84 Shogun 500, '85 Miele Gara, '87 Miyata 512, '89 Centurion Ironman, many more
    Posts
    3,062
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Jacjetlag View Post
    The thing that has changed is what the bearings actually sit upon. They are not housed within a bottom bracket that is screwed into the frame. Trek calls them "precision fit sockets" on the frame surface itself.
    Isn't this what Lambert/Viscount did 35+ years ago?
    Top
    You know it's going to be a good day when the stem and seatpost come right out.

  14. #14
    Newbie
    Join Date
    Aug 2009
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    trek-campy kit

    hi .. i am italian and i buy about 3 weeks ago the frame Madone 5.2 and Super Record 11 group but i am still waiting for the BB kit from Comar italia ( italian importer of Trek bikes)
    I can find the kit from another way ?????

  15. #15
    Junior Member
    Join Date
    May 2008
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Miky....

    Any Trek dealer in the USA can get one sent to you. The supply problem is solved.


    UPDATE: My Trek has been destroyed. It was hit by a drunk driver when I was on it. Two skull fractures and a broken neck. I am all healed up now and lucky to have no permanent disability. A miracle.

Posting Permissions

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