Weight Weenies

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/

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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Yea definitely great news. This flexibility is another great advantage of Di2

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

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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?



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.

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: Select all

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...

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.

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.

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Will it work "mtb 1x10 setup"?

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

PS: without shifters

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.

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

Parts are all coming in. Just waiting for the stuff from the LBS to arrive.



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So, do you all want the good news, or the bad news?

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DartanianX wrote:So, do you all want the good news, or the bad news?

Go with both, in the appropriate order....

Bad, have to wait another day for everything else to arrive from the LBS.

Good, plug and play 11 speed!

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DartanianX wrote:Bad, have to wait another day for everything else to arrive from the LBS.

Good, plug and play 11 speed!

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any updates?

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Yeah, all works fine! No issues whatsoever.

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