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PostPosted: Sat Nov 09, 2013 12:09 am 
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Joined: Fri Sep 30, 2011 4:48 pm
Posts: 48
Confirmed. The RD determines 10 vs. 11 speed. So both of these scenarios work:

1. Full 6770 (10 speed) modified to 11 speed: add 11-speed cassette (requires compatible hub), 11-speed rear derailleur & 11-speed chain.
2. Full 9070 (11 speed) modified to 10 speed: add 10-speed cassette (and spacer) and 10-speed rear derailleur.


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PostPosted: Sat Nov 09, 2013 1:20 am 
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Joined: Fri Nov 08, 2013 11:55 pm
Posts: 2
415brian wrote:
Confirmed. The RD determines 10 vs. 11 speed. So both of these scenarios work:

1. Full 6770 (10 speed) modified to 11 speed: add 11-speed cassette (requires compatible hub), 11-speed rear derailleur & 11-speed chain.
2. Full 9070 (11 speed) modified to 10 speed: add 10-speed cassette (and spacer) and 10-speed rear derailleur.


Thanks Brian! I assume in my case since my hub would still be 10-speed that I wouldn't need to use any kind of spacer.

P.S I'm still not clear as to when you need to use the 1mm spacer with Shimano cassettes. I've heard that you should use it on any hub that is SRAM/Shimano compatible...but not on Shimano only hubs.

Todd.


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Posted: Sat Nov 09, 2013 1:20 am 
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PostPosted: Sun Nov 10, 2013 4:23 pm 
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Joined: Tue Sep 11, 2012 6:07 pm
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Location: The Taint of the USA!
Also, for you guys who have 10-speed wheels that can't be converted, swap on a Campagnolo 11-speed freewheel and run their 11-speed cassettes. Many on the forum have tried it, and it works.


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PostPosted: Sun Nov 10, 2013 8:12 pm 
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Joined: Wed Jun 06, 2012 11:43 pm
Posts: 91
For what it's worth, I have the Dura Ace 9070 levers and front mech on my bike and the 6770 rear mech. Lightest 10-speed setup you can get with newer parts. Works really well.


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