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 Post subject: Dura ace cranks on a mb
PostPosted: Mon Nov 19, 2007 9:23 pm 
Dirt Disciple

Joined: Sun Sep 16, 2007 6:02 pm
Posts: 31
Location: devon
I was just wondering if any1 has ever put Dura ace (latest style) cranks on a mountain bike. because they look really nice on a road bike and it made me think what it would look like on a mountain bike


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:11 pm 
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Location: fettling in the cave
Beware the chainline ooooohhhhhhhh!


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:26 pm 
BoTY Winner
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Joined: Tue Apr 04, 2006 6:39 pm
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Location: Durango CO, USA
Possible. Up until last weekend I ran DA 9-speed cranks with a step-down 42t chainring to 30t, making it a 2X9...

I had to shim the BB out a bit, but it worked.


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:29 pm 
Gold Trader
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Location: Odense, Denmark
You can't shim out the BB on Octalink 2. There aren't enough threads on road BBs.

BUT

You can bodge it. MTB cups are narrower and come with shims. On some frames you could get away with it, if you use an MTB bearing set.


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:34 pm 
BoTY Winner
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Location: Durango CO, USA
dbmtb wrote:
You can't shim out the BB on Octalink 2. There aren't enough threads on road BBs.

BUT

You can bodge it. MTB cups are narrower and come with shims. On some frames you could get away with it, if you use an MTB bearing set.


Use the XTR BB... same theory, just longer splines. The cranks fit fine.


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:54 pm 
Dirt Disciple

Joined: Sun Sep 16, 2007 6:02 pm
Posts: 31
Location: devon
helpfull info i think i might give it a try


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:55 pm 
BoTY Winner
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Location: Durango CO, USA
Petey wrote:
helpfull info i think i might give it a try


Remember DA (and most road cranks) are 130 BCD. Tough to find a set of MTB-size chainrings, but running just two would work.


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 Post subject:
PostPosted: Mon Nov 19, 2007 10:58 pm 
Dirt Disciple

Joined: Sun Sep 16, 2007 6:02 pm
Posts: 31
Location: devon
any1 got any pics of it actuly done


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 Post subject:
PostPosted: Tue Nov 20, 2007 7:33 am 
Retro Guru

Joined: Fri Apr 28, 2006 8:42 pm
Posts: 783
Location: Brighton
Remember that DA cranks are expensive and they won't take much abuse. Ground them a few times and they'll be finished.


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 Post subject:
PostPosted: Tue Nov 20, 2007 9:27 am 
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