Singlespeed & Fixed Gear - DURA ACE 7600 crank on DA 7610 bottom bracket

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raygunner
12-23-05, 08:22 PM
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?

pitboss
12-23-05, 08:34 PM
did you tighten the crank fastening bolts?
how is the chainline?
shants
12-23-05, 08:35 PM
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.

shants
12-23-05, 08:50 PM
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.
raygunner
12-23-05, 08:55 PM
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...
pitboss
12-23-05, 09:00 PM
****ing shants to the rescue!
teadoggg
12-24-05, 12:22 AM
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.
techone
12-24-05, 10:37 AM
What's so pesky about a 49t ring?
raygunner
12-24-05, 10:39 AM
I'm a 48x16 guy
12XU
12-24-05, 10:56 AM
I'm a 48x16 guy

Two skid spots!
shants
12-24-05, 10:59 AM
one skid spot.
pitboss
12-24-05, 11:03 AM
you ****ing nerds...go celebrate not being online or something.
12XU
12-24-05, 11:29 AM
one skid spot.

You can skid with both feet forward, homie.
12XU
12-24-05, 11:29 AM
']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!