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PostPosted: Sun Jun 22, 2014 1:38 pm 
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Joined: Mon Jun 02, 2014 4:34 am
Posts: 48
I have read a few threads here and someone had made the rotor 3d+ crank (with Q-rings) work with ultegra 6770 FD.
So I guess it will works with 6870 FD too. Am I right?


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PostPosted: Sun Jun 22, 2014 2:49 pm 
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Joined: Thu Dec 22, 2011 12:37 am
Posts: 433
Yes! Setup is key but di2 is far and away the best shifting with non-round rings.


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PostPosted: Mon Jun 23, 2014 12:39 pm 
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Joined: Fri Jan 27, 2006 1:38 pm
Posts: 672
Location: Greater Pittsburgh
I'm using 52/38 Q-rings on my tri bike with Di2 7970. I takes some time to set it up correctly (derailleur height over the largest spot and angle are the two critical parameters to play with), but once it's set up, it shifts perfect every single time.

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PostPosted: Wed Jun 25, 2014 11:45 am 
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Joined: Mon Jun 02, 2014 4:34 am
Posts: 48
Thanks for the answers. Really appreciated that. :D


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