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PostPosted: Wed Oct 30, 2013 4:26 pm 
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Joined: Fri Sep 30, 2011 4:48 pm
Posts: 48
I also just confirmed that all 11 speeds of a Dura-Ace RD-9070 rear derailleur will work on an otherwise complete 6770 10-speed system. In other words, the rear derailleur alone determines whether a system is 10 or 11 speed.

Video: http://www.youtube.com/watch?v=1ADH7jwGD-M

For those running the 10-speed 6770 group, upgrading to 11-speed would cost ~$355, not including the hub:

1. 11-speed compatible hub
2. 11-speed cassette (CS-6800: ~$70)
3. 11-speed rear derailleur (RD-6870: ~$250)
4. 11-speed chain (CN-6800: ~$35)

Notes:
+ I am running the latest firmware all components.
+ I did not test the RD-6870 since they're not widely available yet. However, I expect them to behave the same as the RD-9070.
+ Starbike just listed the RD-6870 as in stock (180 EU/250 US): http://www.starbike.com/en/shimano-rd-6870/


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Posted: Wed Oct 30, 2013 4:26 pm 


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PostPosted: Wed Oct 30, 2013 6:34 pm 
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Joined: Fri Sep 27, 2013 11:41 am
Posts: 10
415brian wrote:
I also just confirmed that all 11 speeds of a Dura-Ace RD-9070 rear derailleur will work on an otherwise complete 6770 10-speed system. In other words, the rear derailleur alone determines whether a system is 10 or 11 speed.

Video: http://www.youtube.com/watch?v=1ADH7jwGD-M

For those running the 10-speed 6770 group, upgrading to 11-speed would cost ~$355, not including the hub:

1. 11-speed compatible hub
2. 11-speed cassette (CS-6800: ~$70)
3. 11-speed rear derailleur (RD-6870: ~$250)
4. 11-speed chain (CN-6800: ~$35)

Notes:
+ I am running the latest firmware all components.
+ I did not test the RD-6870 since they're not widely available yet. However, I expect them to behave the same as the RD-9070.
+ Starbike just listed the RD-6870 as in stock (180 EU/250 US): http://www.starbike.com/en/shimano-rd-6870/


this is excellent solid configuration. great to hear and confirmed. I'll be ordering parts. I still need to get the firmware updated


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PostPosted: Wed Oct 30, 2013 7:40 pm 
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Joined: Sun Aug 18, 2013 4:54 am
Posts: 38
Yea definitely great news. This flexibility is another great advantage of Di2 :-)

Pretty glad I went the Di2 route despite the slightly extra weight.

Sent from my GT-I9505 using Tapatalk


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PostPosted: Tue Nov 05, 2013 5:10 pm 
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Joined: Mon Apr 23, 2012 10:21 pm
Posts: 166
Location: London, UK
I'm about to take the plunge into Di2 thanks to a very generous friend. Here's the proposed setup, can anybody tell me if I'm missing anything or if anything is incompatible?

Code:
STIs 6770
v
SM-EW67-A-E
v
SM-JC41
v              v           v
SM-BTR2     RD 6870     FD 6870


Thanks to 415brian I know the STIs will shift all 11spds of the RD but I only want 10 until I either change my wheelsets or upgrade my Powertap freehub body.

Also has anybody "tuned" any of the Di2 STIs? I'm thinking of sanding down the top layer of the lever and drilling a few holes before painting.


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PostPosted: Tue Nov 05, 2013 5:30 pm 
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Joined: Wed Mar 06, 2013 4:23 pm
Posts: 308
Location: Austin, TX
deltree wrote:
I'm about to take the plunge into Di2 thanks to a very generous friend. Here's the proposed setup, can anybody tell me if I'm missing anything or if anything is incompatible?

Code:
STIs 6770
v
SM-EW67-A-E
v
SM-JC41
v              v           v
SM-BTR2     RD 6870     FD 6870


Thanks to 415brian I know the STIs will shift all 11spds of the RD but I only want 10 until I either change my wheelsets or upgrade my Powertap freehub body.

Also has anybody "tuned" any of the Di2 STIs? I'm thinking of sanding down the top layer of the lever and drilling a few holes before painting.


The number of speeds is dictated by the RD not the shifters. If you use a 6870 RD you'll likely need to have an 11s cassette...

_________________
My Cervelo R5
My Cervelo S3
My MTB


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PostPosted: Tue Nov 05, 2013 5:43 pm 
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Joined: Mon Apr 23, 2012 10:21 pm
Posts: 166
Location: London, UK
D'oh. Looks like I glazed over that last page.

Well more motivation to sell my Powertap and get a new set of wheels and an SRM instead! Thanks.


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PostPosted: Wed Nov 20, 2013 1:30 am 
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Joined: Sun Nov 13, 2011 6:00 am
Posts: 236
6870 Rear derailleur in the post. Hopefully arriving by Friday. 11 speed cassette, chain and Ultegra 6800 wheel set ordered at LBS so should have 11speed up and running on an otherwise 6770 groupset this weekend.

Sent from my Nexus 4 using Tapatalk


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PostPosted: Wed Nov 20, 2013 12:27 pm 
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Joined: Mon Dec 08, 2008 12:25 pm
Posts: 3
Will it work "mtb 1x10 setup"?

EW90 (A/B)
RD 6770
SW R600
BTR2+BRC2 set
+ cables

PS: without shifters


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PostPosted: Wed Nov 20, 2013 1:54 pm 
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Joined: Fri Sep 27, 2013 11:41 am
Posts: 10
DartanianX wrote:
6870 Rear derailleur in the post. Hopefully arriving by Friday. 11 speed cassette, chain and Ultegra 6800 wheel set ordered at LBS so should have 11speed up and running on an otherwise 6770 groupset this weekend.

Sent from my Nexus 4 using Tapatalk



Looking forward to see how it goes for you. keep us posted


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PostPosted: Thu Nov 21, 2013 2:27 am 
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Joined: Sun Nov 13, 2011 6:00 am
Posts: 236
Parts are all coming in. Just waiting for the stuff from the LBS to arrive.

Image

Sent from my Nexus 4 using Tapatalk


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PostPosted: Thu Nov 21, 2013 8:33 am 
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Joined: Sun Nov 13, 2011 6:00 am
Posts: 236
So, do you all want the good news, or the bad news?

Sent from my Nexus 4 using Tapatalk


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PostPosted: Thu Nov 21, 2013 9:37 am 
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Joined: Mon Dec 20, 2010 9:25 am
Posts: 146
Location: Sydaaneeeee
DartanianX wrote:
So, do you all want the good news, or the bad news?

Go with both, in the appropriate order.... :wink: :)


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PostPosted: Thu Nov 21, 2013 10:20 am 
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Joined: Sun Nov 13, 2011 6:00 am
Posts: 236
Bad, have to wait another day for everything else to arrive from the LBS.

Good, plug and play 11 speed!

Sent from my Nexus 4 using Tapatalk


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PostPosted: Wed Nov 27, 2013 12:27 pm 
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Joined: Fri Sep 27, 2013 11:41 am
Posts: 10
DartanianX wrote:
Bad, have to wait another day for everything else to arrive from the LBS.

Good, plug and play 11 speed!

Sent from my Nexus 4 using Tapatalk


any updates?


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Posted: Wed Nov 27, 2013 12:27 pm 


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PostPosted: Wed Nov 27, 2013 10:27 pm 
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Joined: Sun Nov 13, 2011 6:00 am
Posts: 236
Yeah, all works fine! No issues whatsoever.

Sent from my Nexus 4 using Tapatalk


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