Crank Spin

Questions about bike hire abroad and everything light bike related. No off-topic chat please

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mxfox
Posts: 181
Joined: Mon Jul 03, 2006 3:24 am
Location: NC mountains Hanging Dog

by mxfox

What is normal for a crank to spin
Image
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CaptainWilier
Posts: 1913
Joined: Thu Feb 24, 2005 5:14 am
Location: Georgia

by CaptainWilier

if he had heavier pedals on, it would spin longer.
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by Weenie


seriousconsult
Posts: 351
Joined: Wed Sep 14, 2005 11:48 pm

by seriousconsult

Wow! I need a new BB and crank!

mathi
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Joined: Fri Sep 16, 2005 9:03 pm
Location: uk

by mathi

:shock: My ceramic Claviculas dont spin like that :?

lexen
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Joined: Wed Jun 14, 2006 11:05 am
Location: Ruddervoorde Belgium

by lexen

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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Hyde
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Joined: Mon Jun 26, 2006 4:39 am
Location: Los Angeles=Hills, Smog

by Hyde

Must be those pedals. :lol: I wonder if he is using a sealed or loose ball bearing bb.

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cortinovis
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Joined: Mon Aug 22, 2005 6:41 pm
Location: Flanders

by cortinovis

Some video's from youtube. Keep them spinning!
movie1

bearing test shimano
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mxfox
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Location: NC mountains Hanging Dog

by mxfox

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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asphaltdude
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by asphaltdude

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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Hyde
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Location: Los Angeles=Hills, Smog

by Hyde

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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drjones96
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Joined: Thu Nov 04, 2004 10:56 pm
Location: Wichita, KS

by drjones96

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).

by Weenie


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tymon_tm
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Joined: Tue Sep 05, 2006 4:35 pm

by tymon_tm

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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