How to wire up new Bar-End Junction A for Di2 (EW-RS910)

Discuss light weight issues concerning road bikes & parts.
murphyk
Posts: 5
Joined: Sat Aug 19, 2017 11:17 am

by murphyk

That's really useful info. Thanks guys.

I think I've finally understood!

So in theory I could run cables from rear mech and battery direct to shifters, but you'd need a cable that is longer than Shimano make.

A bodge around it would be to use EW-JC200 for one cable and the EW-WU111 on the other to effectively work as extenders halfway down the downtube (or wherever).

But what's the point? A SM-JC41 at the bottom bracket allows me to run a single cable up the shifters. Not sure how much the cable weighs, but the JC41 is 3g. The JC200 is 1g. So as long as the etube cable weighs more than 2g, I've saved weight by using the B junction and a single cable.

So that's an easy decision. Rear mech and battery to B junction. B junction to LHS. LHS to RHS. RHS to bar end junction. And then throw in a WU111 somewhere in the handlebars to allow wireless connectivity.

Thanks for all the help. Shimano don't make it easy. And their product naming convention is terrible!

Cheers.

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bomber
Posts: 271
Joined: Tue May 29, 2007 8:53 pm
Location: L'Australie

by bomber

murphyk wrote:Rear mech and battery to B junction. B junction to LHS. LHS to RHS. RHS to bar end junction. And then throw in a WU111 somewhere in the handlebars to allow wireless connectivity.


That's how mine is wired. Works well!
Friends don't let friends ride Mavic... or Pinarellos!


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by Weenie


justaute
Posts: 227
Joined: Fri Jan 04, 2013 7:17 pm
Location: UT/TX/PA, USA

by justaute

Curious...has anyone drilled carbon bars, near the bar-end?

saibot
Posts: 70
Joined: Fri Dec 28, 2012 9:34 am

by saibot

I have, both sides, no issues yet.

justaute
Posts: 227
Joined: Fri Jan 04, 2013 7:17 pm
Location: UT/TX/PA, USA

by justaute

Thanks.

saibot wrote:I have, both sides, no issues yet.

raggi
Posts: 49
Joined: Thu Mar 02, 2017 2:43 pm

by raggi

Does anyone know of a list/resource of all the handlebars which can internally route to the RS910?

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

Does the EW-RS910 also works with the 6870groupset?
I also want to buy the WU111 but have to check the battery. Can I figure out which type battery I have without taking the battery out of the frame? Perhaps by connecting the juction A to the desktop and run the Etube programme?

Sorry for my bad English, I'm from Belgium :oops:

idinfo68
Posts: 98
Joined: Wed Nov 05, 2014 9:35 pm
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by idinfo68

Yes and yes...
Oui et oui...

See this document, voir ce document : http://productinfo.shimano.com/download/pdf/com/2.7/en

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

Thanks, a internal battery is always BT-DN110 or not?

idinfo68
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Joined: Wed Nov 05, 2014 9:35 pm
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by idinfo68

No....

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

Oké, I will connect the grouset to the dekstop and see which it is.

idinfo68
Posts: 98
Joined: Wed Nov 05, 2014 9:35 pm
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by idinfo68

idinfo68 wrote:Yes and yes...
Oui et oui...

See this document, voir ce document : http://productinfo.shimano.com/download/pdf/com/2.7/en


Compatibility for battery BT-DN110 (new battery for Synchroshift) at page 38
For olds battery, look at page 40 of the PDF linked above...

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

Timmy269 wrote:Does the EW-RS910 also works with the 6870groupset?
I also want to buy the WU111 but have to check the battery. Can I figure out which type battery I have without taking the battery out of the frame? Perhaps by connecting the juction A to the desktop and run the Etube programme?

Sorry for my bad English, I'm from Belgium :oops:


The only info I can get out the Etube project is SM-BTR2 firmware 3.0.10

idinfo68
Posts: 98
Joined: Wed Nov 05, 2014 9:35 pm
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by idinfo68

So you have an old battery model. See compatibility on page 40.

This battery is not compatible with the new wireless unity EW-WU101 or 111.
You can only use this model of wireless unity "SM-EWW01". It can be easily installed in the handlebar...

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

idinfo68 wrote:So you have an old battery model. See compatibility on page 40.

This battery is not compatible with the new wireless unity EW-WU101 or 111.
You can only use this model of wireless unity "SM-EWW01". It can be easily installed in the handlebar...


Damm, the SM-EWW01 I already have instaled, but I don't think I can connect it to my Smartphone.

The EW-RS910 would work with my "old" battery.

by Weenie


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