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PostPosted: Wed Feb 06, 2013 7:11 pm 
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Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7925
Location: San Francisco, CA
Phill P wrote:
I'm 100kg+ (that's all I'll own up to). I changed from a triple butt Al frame to a Cannondale System 6. MY GOD do I prefer the System 6 for so many reasons!!


I'm 57 kg so multiply stiffness from me to you by 0.57. Further you're on a bigger frame so likely for the same frame model mine is already likely stiffer.

So I concur with the "sweet spot" comments.

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PostPosted: Wed Feb 06, 2013 11:05 pm 
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Joined: Sat May 12, 2012 5:48 am
Posts: 105
i would not worry much about stiffness but much more on your riding position. you need to have a bike with balanced stiffness. its like choosing the s-works sl4 over the cannondale evo just because it stiffer.


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Posted: Wed Feb 06, 2013 11:05 pm 


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PostPosted: Thu Feb 07, 2013 2:38 am 
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Joined: Thu Jan 10, 2013 3:43 pm
Posts: 29
Location: Seattle
djconnel wrote:
Further you're on a bigger frame so likely for the same frame model mine is already likely stiffer.
:noidea:

Larger carbon frame sizes almost always employ more material to result in stronger and stiffer frames despite the larger triangle because the intended audience will necessarily be heavier.


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PostPosted: Thu Feb 07, 2013 5:52 am 
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Joined: Sat Jun 02, 2007 1:10 am
Posts: 1852
Location: Melbourne, Australia
djconnel wrote:
I'm 57 kg so multiply stiffness from me to you by 0.57. Further you're on a bigger frame so likely for the same frame model mine is already likely stiffer.

So I concur with the "sweet spot" comments.


Right there with you DJ-shorter riders on smaller frame would want more vertical flex and stress less about torsional or drive line stiffness. My system6 is a massive 60cm frame. The triple butted frame of course was pretty large as well. I thought the system 6 would rider harsher than it did, but I was really surprised how much more forgiving it was than the smaller OD tube of the triple butted frame. The rear of the system 6 is Al as well. If given the opportunity I would love to rebirth the system six frame manufacturing its a great frame-naked clear coat with polished or ano rear ends mmmmmm.

It really just comes down to another consideration for the kind of rider you are.
Is the frame stiff/forgiving for the type or rider you are- and of course does the bike fit you properly!!


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PostPosted: Thu Feb 07, 2013 8:13 am 
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Joined: Sat Oct 10, 2009 4:38 am
Posts: 41
This post reminded me of why I'm not selling my system six even though I have an evo. Shame that the system six is the 'foul weather bike' but I just can't bear to part with it.

-t


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