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  1. #1
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    bottom bracket for dura-ace 7700?

    So I got a dura-ace crankset 7700 for 25$ yes there are scratches but structurally it's fine, not warped or untrue.

    That was a steal!

    Now the problem is the bottom bracket and correct if I'm wrong, thats why I'm here for help.



    I think it needs 68mm 109.5 octalink type bottom bracket,

    but everytime I goto a bike shop, it's over 50$+ for the bottom bracket...let it be BB-5500 or BB-6500. WHY IS IT SO EXPENSIVE FOR AN OLD BOTTOM BRACKET?

    I was wondering would it be a good idea to use a ES-25 bottom bracket? except they don't have 109.5, I think the shortest they have are 113, would this be a problem?





    Note*******My current crank is a FSA Veloce double chainring but I'm running ONLY the larger outter chainring and removed the small inside chainring while running a 9 speed in the back.
    MY CHAIN DOES NOT COME OFF when shifting into any of these speeds.

  2. #2
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    http://bikeisland.com/cgi-bin/BKTK_S...ls&ProdID=1273

    will this fit the 7700 dura-ace crank? the length is a bit shorter...is it ok?

  3. #3
    Call me The Breeze I_bRAD's Avatar
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    You're gonna just have to suck it up and buy a 5500 bb if you want to use that crank

  4. #4
    Senior Member cnnrmccloskey's Avatar
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    You gotta good deal on the crank now suck it up and drop 50 bucks to use it

  5. #5
    I have senior moments... bikinfool's Avatar
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    Quote Originally Posted by FOBx530 View Post
    http://bikeisland.com/cgi-bin/BKTK_S...ls&ProdID=1273

    will this fit the 7700 dura-ace crank? the length is a bit shorter...is it ok?
    ISIS and Octalink aren't compatible...you need one of the few Shimano bb's that work with that crank (it's a v.1 Octalink, too btw). http://sheldonbrown.com/bbsize.html#shimano
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
    Road bikes: TST, Trek 2300 (Carbon/Alum)

  6. #6
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    Quote Originally Posted by FOBx530 View Post
    I was wondering would it be a good idea to use a ES-25 bottom bracket? except they don't have 109.5, I think the shortest they have are 113, would this be a problem?
    The length isn't the issue, the design is. There were two "Octalink" configurations, V1 and V2. V1 was used on road cranks; Dura Ace, Ultegra and 105 and, IIRC, XTR. V2 was used on the lower MTB groups and one low-line road group.

    So, your DA crank needs a V1 bb and the ES-25 is a V2.

    Licktons has the BB-5500 in 109.5 for $40 here: http://www.lickbike.com/productpage....B='0229-13'

    Buy the right one.

  7. #7
    Senior Member
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    CBO has the BB-5500 for $21.95 + $7 shipping. Best deal around. I just bought one.

    http://www.cambriabike.com/shopexd.a...Bottom+Bracket
    Doug

    '72 Fuji Finest
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  8. #8
    I have senior moments... bikinfool's Avatar
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    Me too! Thanks for the tip...
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
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