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xtr bb useable with dura ace triple(6 posts)

xtr bb useable with dura ace tripleeflayer2
Sep 15, 2002 5:43 PM
I installed dura ace triple cranks on new Rivendell frame. Frame has wide stays to make room for bigger tires. With Dura ace triple bb, inner chain ring hits the chain stay. I was wondering if the xtr bb would be a bit wider, provide more clearance and work with the Dura ace crank?

Any info or suggestions would be appreciated.
re: xtr bb useable with dura ace tripleAtombomber
Sep 15, 2002 9:03 PM
Yes, the XTR BB will work with the Dura-ace octalink splines. However, for your purpose, it won't work, since the XTR BB is narrower than the Dura-ace triple BB.

Get a big hammer and make room for your granny ring.
xtr bb useable with dura ace triple?, but.....gogene
Sep 16, 2002 3:17 AM
....depending on the clearance needed, a spacer (1~2mm) can be put under the driveside BB cup to move your chainline over the necessary amount. Then again, you could call Rivendell and get their advice.
Phil Wood? Call a tandem builder maybe.........nmSpunout
Sep 16, 2002 4:06 AM
68cm vs 73cm to get more width?eflayer2
Sep 16, 2002 5:02 AM
Doesn't the xtr bb come in a width of 73cm for wider bb shells? Would it be possible to put a 73 bb in a 68 shell and use the extra width to get the crank side clearane I need. And just use spacers to take up the extra width?
You need more spindle length.Spoke Wrench
Sep 16, 2002 7:22 AM
I don't know about the bottom bracket for a DA triple, but an Ultegra triple BB has a 118.5mm spindle length. The widest XTR spindle listed in my year old QBP catalogue is 116mm.

The first thing I would do would be to measure the spindle length of your current bottom bracket. Then you can estimate how much additional you need. If you only need a couple of millimetrs, you can probably "cheat" your bottom bracket over to the right 2mm spacer under the fixed cup.