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PostPosted: Fri Mar 07, 2014 9:31 am 
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Joined: Sun Oct 30, 2005 2:41 pm
Posts: 68
I have recently changed from my Rotor 3D crankset to a new LOOK ZED 2, but I feel the pedals are now placed wider than what im used to... I found the q-factor numers to be 149mm for the Rotor cranks, so it would be really helpful if someone here knew the exact numbers for the LOOK cranks? Thx!


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Posted: Fri Mar 07, 2014 9:31 am 


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PostPosted: Fri Mar 07, 2014 2:07 pm 
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Joined: Sat Jul 17, 2010 11:36 am
Posts: 170
Hi,

Why not measure to determine the precise width of your cranks as installed? If you still have the old crank, measure that one, too.

Do your pedals require spacers to fit flush to the Zed (or your old unit)?

I guess it goes without saying that you didn't change crank length...? The Zed has a few user-configurable lengths, so it's not a given that yours is set to the length you prefer. That could create the impression of a wider Q if set incorrectly.

Best,

Tim


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PostPosted: Fri Mar 07, 2014 3:47 pm 
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Joined: Sun Oct 30, 2005 2:41 pm
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Well, it would be the best to just measure the LOOK cranks I now have on my bike. But I don't know how to measure the q-factor correctly when the bike is installed on the bike.... The whole crank is one-piece, so any suggestion to do an accurate measurement is welcomed ;)

I do not use any spacers on the pedal-axels on my previous Rotor cranks. I have now tired to move the cleats on mye shoes a little bit so the shoes now are positioned more close to the cranks. Feels more alike now. It would just be nice to know the accurate difference between to two cranksets.


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PostPosted: Fri Mar 07, 2014 4:42 pm 
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Joined: Wed Dec 29, 2010 2:16 am
Posts: 168
I can't imagine that Look doesn't provide this info somewhere...

Sent from my Galaxy Nexus using Tapatalk


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PostPosted: Fri Mar 07, 2014 8:05 pm 
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Joined: Fri May 25, 2007 6:43 pm
Posts: 1978
I can't believe snorre can't work a tape measure or steel rule!


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PostPosted: Sun Mar 09, 2014 7:02 am 
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Joined: Thu Aug 20, 2009 12:44 pm
Posts: 113
just make a pencil mark on a stay and measure to each arm !


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PostPosted: Mon Mar 10, 2014 12:20 am 
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Joined: Fri Dec 11, 2009 10:38 pm
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Location: Toronto
With a crank lining up with the seat tube, measure from the center of the seat tube to the outside edge of the crank. Tape measure or steel rule. Multiply the result by 2.

Since the cranks are presumably optimized for a LOOK frame, I'd not be surprised if their Q factor was a little less than an aftermarket crank that has to be able to work with a wide variety of frames.

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PostPosted: Tue Mar 11, 2014 6:11 am 
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Joined: Wed Feb 02, 2011 3:48 am
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bikerjulio wrote:
With a crank lining up with the seat tube, measure from the center of the seat tube to the outside edge of the crank. Tape measure or steel rule. Multiply the result by 2.

Splitting hairs here, but this assumes that the cranks are symmetrical which may not be the case.

Check each side individually and add the measurements together.


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PostPosted: Tue Mar 11, 2014 6:22 am 
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:exactly: Stages is coming out with a Q factor measuring device. It costs a little over half of competing devices. The device measures center to outside of left crank, then applies an algorithm* to determine Q factor.

* multiply by 2


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Posted: Tue Mar 11, 2014 6:22 am 


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