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PostPosted: Wed Nov 23, 2016 8:35 pm 
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Joined: Fri Jun 01, 2012 3:00 pm
Posts: 195
Location: San Sebastian
A companion of foromtb, to purchase a rear derailleur new? Dura-ace 7970-a, in appearance is as a RD 9070

it comes with and a e-tube cable, and an adapter from e-tube to connection of the Dura-Ace

Not fake

Date July 2016
http://si.shimano.com/php/download.php? ... 00-SPA.pdf

http://si.shimano.com/php/download.php? ... A-4117.pdf

do not have more information, someone knows something more??

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PostPosted: Wed Nov 23, 2016 9:09 pm 
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Joined: Thu Mar 28, 2013 4:42 pm
Posts: 861
Location: Pa USA
Wow-certainly solves the problem of failures in the originals and replacements disappearing.


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Posted: Wed Nov 23, 2016 9:09 pm 


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PostPosted: Wed Nov 23, 2016 9:37 pm 
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Joined: Sun May 16, 2010 7:28 pm
Posts: 1166
I feel like something is lost in translation here, but is this an option to retrofit etube connections to old dura ace 7970 derailleurs?
Very interesting. English instructions available here:
http://si.shimano.com/php/download.php? ... 00-ENG.pdf
It appears Shimano has created a new 10-speed di2 rear derailleur (RD-7970-A) that uses e-tube rather than the old 5-pin dura ace connectors. It uses an additional junction box (SM-RD79-A) to convert from the old style connector (EW-7970) to the new e-tube connectors (EW-SD50). If this is real, that is a great option for people with old groups that have a toasted rear derailleur. What is exciting for me is the potential for purchasing a new 10-speed rear derailleur, as I am building up a gruppo of old 6770 parts and am unable to find a reasonably priced RD. If there was a junction box that converted the reverse, from e-tube from to 5-pin di2, that would be fantastic too as there are a boat load of first-gen 7970 rear derailleurs out there.
Image


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PostPosted: Wed Nov 23, 2016 10:08 pm 
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Joined: Sun May 16, 2010 7:28 pm
Posts: 1166
German article describing a return from Shimano in June 2016
http://www.best4cycling.com/2016/06/15/ ... r-was-tun/
UK company apparently selling the 10spd version
http://www.madison.co.uk/products/cycli ... r-ss-cage/


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PostPosted: Wed Nov 23, 2016 10:09 pm 
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Joined: Tue Aug 02, 2011 5:54 pm
Posts: 409
I found one link to a Japanese blogger who ordered this from Bike24 and reports that it worked fine (posted in August).

Unfortunately, Bike24 no longer seems to carry it.


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PostPosted: Wed Nov 23, 2016 10:20 pm 
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Joined: Sun May 16, 2010 7:28 pm
Posts: 1166
Also a 6770 version apparently!
http://si.shimano.com/php/download.php? ... A-4116.pdf
I'm going to have my shop ask a dealer about this. If I'm going to end up paying $150 for a scratched up 10 speed di2 derailleur, I might as well pay a bit more for a new one.


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PostPosted: Thu Nov 24, 2016 8:20 pm 
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Joined: Sun Sep 29, 2013 4:34 pm
Posts: 71
Madison are the official Shimano UK importer. I think they have a consumer facing site as well, but I'm not sure if you are able to buy direct, normally orders go through a retailer.

They have the 7970a mech in stock. Certainly, a UK retailer with a Madison account could order it for a customer. The current suggested retail is £549! The 6770 is also available new, suggested retail is £249….. I'm sure there would be some room for negotiating a lower purchase price…...

The GB pound has fallen in value quite a bit recently, seems to be resulting in higher prices for this sort of stuff for us in general.


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PostPosted: Thu Nov 24, 2016 9:17 pm 
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Joined: Sat May 21, 2016 12:59 pm
Posts: 348
RD-6770-A have many parts from RD-6870
RD-7970-A have many parts from RD-9070

not sure if geometry is similar:
http://si.shimano.com/pdfs/ev/EV-RD-6770-A-4116.pdf
http://si.shimano.com/pdfs/ev/EV-RD-7970-A-4117.pdf

at least cage is the same on both
you can upgrade ultegra from SS to GS cage

IRD6770ASS - model number for new RD-6770-A
IRD6770SS - model number for old RD-6770
price range €180+

IRD7970ASS - model number for new RD-7970-A
IRD7970SS - model number for old RD-7970
price range €650+

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Last edited by ooo on Tue Mar 21, 2017 9:50 am, edited 1 time in total.

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PostPosted: Fri Nov 25, 2016 2:00 am 
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Joined: Sun May 16, 2010 7:28 pm
Posts: 1166
Does somebody know of a US distributor?


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PostPosted: Thu Jan 26, 2017 7:43 pm 
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Joined: Wed Mar 19, 2008 8:38 pm
Posts: 31
Bump for this interesting 7970 rear der version!
Ebay doesn't have any 7970-A visible yet. Maybe they will come soon.

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Eric in San Carlos, CA


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Posted: Thu Jan 26, 2017 7:43 pm 


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PostPosted: Thu Jan 26, 2017 11:30 pm 
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Joined: Sat May 21, 2016 12:59 pm
Posts: 348
Shimano RD-7970-A in stock € 550 +

http://en.hollandbikeshop.com/bicycle-parts-road-bike/road-bike-derailleur/road-bike-rear-derailleur/shimano-dura-ace-di2-derailleur-10s-double-black/
http://shop.m-way.ch/de/shimano-wechsel-dura-ace-di2-rd-7970-10-gang-ss-direktmontage-box-4524667906889
http://www.ebay.co.uk/itm/152346390479

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