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  1. #1
    GG + Wendy O. 4EVA raygunner's Avatar
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    DURA ACE 7600 crank on DA 7610 bottom bracket

    I just scored this nice Dura-Ace NJS groupo but the BB is a DA 7610 and the crank is DA 7600.

    I threw them on but they don't look right, too much of the spindle is exposed. Though the DA 7600 BB has the same sindle length as the 7610.

    Am I missing something?

  2. #2
    cxmagazine dot com pitboss's Avatar
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    did you tighten the crank fastening bolts?
    how is the chainline?
    Deathlap - cyclocross, training, beer,...escape hatch

  3. #3
    roll'em high shants's Avatar
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    that is the proper match. i have the same setup and it provides a perfect chainline. 109mm spindle. i didn't notice anything too strange looking. your best bet is to measure and be sure.

  4. #4
    roll'em high shants's Avatar
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    looking at my bike a second ago, you might be perceiving that the spindle is longer because, in cartridge bottom brackets, the cups are recessed a couple of mm from the outside of the bottom bracket shell to where the bearing/seal actually is, which shows more of the spindle, making it appear longer. on standard loose bearing setups, the cups have flat surfaces that are flush with the outside of the bottom bracket shell. you will "see" a longer spindle on the cartridge relative to this. i hope this makes sense and clears up the situation.

  5. #5
    GG + Wendy O. 4EVA raygunner's Avatar
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    Quote Originally Posted by shants
    looking at my bike a second ago, you might be perceiving that the spindle is longer because, in cartridge bottom brackets, the cups are recessed a couple of mm from the outside of the bottom bracket shell to where the bearing/seal actually is, which shows more of the spindle, making it appear longer. on standard loose bearing setups, the cups have flat surfaces that are flush with the outside of the bottom bracket shell. you will "see" a longer spindle on the cartridge relative to this. i hope this makes sense and clears up the situation.
    That makes perfect sense!

    I just threw it on my new frame (a non-NJS Japanese frame, but mucho kewl!) and it works out fine. Now I just need a 48t chainring & swap out that pesky 49t...

  6. #6
    cxmagazine dot com pitboss's Avatar
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    ****ing shants to the rescue!
    Deathlap - cyclocross, training, beer,...escape hatch

  7. #7
    Skidmaster teadoggg's Avatar
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    Quote Originally Posted by raygunner
    That makes perfect sense!

    I just threw it on my new frame (a non-NJS Japanese frame, but mucho kewl!) and it works out fine. Now I just need a 48t chainring & swap out that pesky 49t...
    i'll swap your my sugino 1/8 48t for your 49, if it's 1/8.

  8. #8
    dead mileage techone's Avatar
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    What's so pesky about a 49t ring?
    un por ciento...

  9. #9
    GG + Wendy O. 4EVA raygunner's Avatar
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    I'm a 48x16 guy

  10. #10
    Dismount Run Remount etc. 12XU's Avatar
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    Quote Originally Posted by raygunner
    I'm a 48x16 guy
    Two skid spots!

  11. #11
    roll'em high shants's Avatar
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    one skid spot.

  12. #12
    cxmagazine dot com pitboss's Avatar
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    you ****ing nerds...go celebrate not being online or something.
    Deathlap - cyclocross, training, beer,...escape hatch

  13. #13
    Dismount Run Remount etc. 12XU's Avatar
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    Quote Originally Posted by shants
    one skid spot.
    You can skid with both feet forward, homie.

  14. #14
    Dismount Run Remount etc. 12XU's Avatar
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    Quote Originally Posted by [165]
    you ****ing nerds...go celebrate not being online or something.
    I'm actually at work bored out of my skull. 1 1/2 hours left!

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