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 Post subject: Crank Spin
PostPosted: Tue May 20, 2008 11:06 pm 
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Joined: Mon Jul 03, 2006 3:24 am
Posts: 181
Location: NC mountains Hanging Dog
What is normal for a crank to spin
Image

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 Post subject:
PostPosted: Wed May 21, 2008 2:25 am 
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Joined: Thu Feb 24, 2005 5:14 am
Posts: 1913
Location: Georgia
if he had heavier pedals on, it would spin longer.

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 Post subject: -
PostPosted: Wed May 28, 2008 8:05 am 
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Joined: Wed Sep 14, 2005 11:48 pm
Posts: 351
Wow! I need a new BB and crank!


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 Post subject:
PostPosted: Wed May 28, 2008 9:32 am 
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Joined: Fri Sep 16, 2005 9:03 pm
Posts: 1276
Location: uk
:shock: My ceramic Claviculas dont spin like that :?


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 Post subject:
PostPosted: Wed May 28, 2008 2:27 pm 
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Joined: Wed Jun 14, 2006 11:05 am
Posts: 17
Location: Ruddervoorde Belgium
My new SI SL crank almost does. No one commenting on the horror of a Coda Magic crank on a specialized ?


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 Post subject:
PostPosted: Thu May 29, 2008 4:36 am 
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Joined: Mon Jun 26, 2006 4:39 am
Posts: 1688
Location: Los Angeles=Hills, Smog
Must be those pedals. :lol: I wonder if he is using a sealed or loose ball bearing bb.


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 Post subject:
PostPosted: Thu May 29, 2008 10:14 am 
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Joined: Mon Aug 22, 2005 6:41 pm
Posts: 262
Location: Flanders
Some video's from youtube. Keep them spinning!
movie1

bearing test shimano

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 Post subject:
PostPosted: Thu May 29, 2008 2:01 pm 
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Joined: Mon Jul 03, 2006 3:24 am
Posts: 181
Location: NC mountains Hanging Dog
The bearings are standard bearings I bought on ebay, sealed, I think I paid 17.00 for 8, I"ve been using these cranks for 10 years and have learned to get them just right :D

and the horror, I paid 135.00 for the cranks. stiff, easy to service and relatively light

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 Post subject:
PostPosted: Thu May 29, 2008 2:29 pm 
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Joined: Tue Aug 12, 2003 8:39 pm
Posts: 1234
Location: Holland
Hyde wrote:
Must be those pedals. :lol: I wonder if he is using a sealed or loose ball bearing bb.


Those pedals are really aerodynamic :lol:

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 Post subject:
PostPosted: Thu May 29, 2008 3:46 pm 
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Joined: Mon Jun 26, 2006 4:39 am
Posts: 1688
Location: Los Angeles=Hills, Smog
mxfox wrote:
The bearings are standard bearings I bought on ebay, sealed, I think I paid 17.00 for 8, I"ve been using these cranks for 10 years and have learned to get them just right :D

and the horror, I paid 135.00 for the cranks. stiff, easy to service and relatively light
Can't ask for more than that!


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 Post subject:
PostPosted: Sat May 31, 2008 4:24 am 
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Joined: Thu Nov 04, 2004 10:56 pm
Posts: 3722
Location: Wichita, KS
My crank spins a lot like that. FSA Superlite w/Dura-Ace 7700 series BB and Speedplay pedals. It may be a little 'free' for my liking though. My BB is adjustable so I may need to go a tad tighter next time I service it.

Some may debate whether or not an unloaded crank spinning like that translates to better efficiency when loaded (ie with chain on and going down the road).

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 Post subject:
PostPosted: Sat May 31, 2008 6:16 pm 
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Joined: Tue Sep 05, 2006 4:35 pm
Posts: 1652
drjones96 wrote:

Some may debate whether or not an unloaded crank spinning like that translates to better efficiency when loaded (ie with chain on and going down the road).


it probably doesn't, hence the integrated bb revolution.

you won't spin such crank that way, but they show nice advantage under load. i was able to spin fsa/isis cranks easily like those 'watchamacallits' - but they felt much 'tougher' to spin at ~35/40+ kmh


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