Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

Wow, that is awesome, but it's for my gravel bike so maybe not quite right.

So, I bought a bike for my brother to get into tri, and it came with a short cage 6870 RD. When we were setting up the bike, I put it on my direct drive trainer for him to ride as we adjust seatpost, stem..etc. Like the proper idiot I am. The trainer had a 32t cassette on, and I havent checked the limit screws either...soooo we managed to twist the RD behind the cassette. Great.

I found a job lot of broken/for parts 6870 RDs on ebay, 4 of them in total. Reached out to @Di2_GP who has been incredibly helpful with tips and tricks on how to disassemble these. I managed to swap the servo from my brother's twisted RD to one with a broken motor but functional body. Then started testing the rest of the job lot, turns out 3/4 has a working motor, and one of them was basically in a working condition after I cleaned its di2 port and gave it a rebuild. Love when these things get a second life!

1 Attachment

Nice that you could find a use for other broken stuff but why on earth were you even changing gears on a direct drive turbo if you just wanted to adjust seat height and shit?

Good work, glad I could be of assistance. Another Di2 saved from trash = Success

I just put him on a random watopia route because he wanted to see what zwift is like. Trainer wasnt in erg mode, and he was heading uphill… reasonable from his side, I should have changed cassette / tell him not to shift around etc.

Surprised that both Pidcock and PFP used mechanical XTR. Di2 would better suit full suspension no? Or is Di2 crap for off road.

Nobody knows because nobody uses it

I use di2 for cross and it’s fantastic. Precise gear shifts no matter how much mud is on the drivetrain.

It sucks when you kill a rear mech though.

My Di2 has just died, on the south downs way.
no lights, nothing. I charged it a couple of days ago and there wasn't the usual rear Shifting but no front that happens when the battery is low.
Nothing happens when I hold the button down, even for 30 seconds it's not crash mode.
I'm checking all the connections. Anything else?
I haven't got my charger with me as it was fully charged, otherwise I'd try charging it and see what happens

Disconnected everything and reconnected and it's working now. Thank fuck.

Make sure the connections really click, otherwise you'll shake them loose and no juice.

They held so I could finish the day.
Could have done with that pusher in tool as hands were a bit fucked from braking.
Weird how it just blanked.

Yeah, that's a bit not cool.

Thought my battery died from letting it go flat and sit like that for months, no charging light when I plugged it in. Fished out the battery and connected it direct to the charger (charging jack deleted on my full internal setup, I have an e-tube plug on the end of my charger instead), and it came good.

After hive mind advice please!

First foray into lecce shifting, got an Ultegra shift-kit from @Olibob recently (thank you!) and finally getting round to finalising the parts needed to fit it to my 2021 Emonda (Ultegra).

The parts I’ve got are:
R8070 shifters
R8050 Di2 GS Rear Derailleur
R8050 Di2 Front Derailleur
BT-DN110 Di2 Internal Battery (with Emonda seat post mount adapter and grommet for chain stay exit)
SM-JC41 Di2 Internal Cable Junction
EW-RS910 Bluetooth Junction Box
Selection of cables (EW-SD50) which look long enough for the frame size when I lay it all out

Am I missing anything? (I've got new olives etc)

Will the EW-RS910 allow me to use the App and connect my Wahoo via Bluetooth or will I also need to add a 2-port inline junction somewhere?

Trying to make it as slick as I can, so have some heat shrink tubing to hand for cables as well as small cable ties for the wiring to stop any rattling inside the frame, but any hints/tips would be gratefully received!

Thanks!!

My understanding is that you need the Bluetooth inline junction box to enable Bluetooth connectivity on 11 speed Di2 systems (it comes as standard on 12 speed). I looked into this a while ago and it's hard to find decent documentation to explain what you need, so hopefully someone else on here has done it already and can explain.

I've been trying to work it out too, bettershifting.com is a great source of info, but I've gone down a rabbit hole on it and still seem confused :D

There is a Bluetooth dongle which you need to place somehwere in the system, thought better shifting had covered this.
This is the doodad https://www.chainreactioncycles.com/p/shimano-ew-jc200-di2-e-tube-2-port-junction?kk=a4c6295-18a9d40f7ad-340433&msclkid=585b2476f0791abfc803417380a7f9ad&utm_source=kelkoouk&utm_medium=cpc&utm_campaign=kelkooclick&utm_term=Shimano+EW-JC200+Di2+E-Tube+2+Port+Junct
Make sure it sits somehwere close to the surface of the frame or bars to get a good signal.
Think it’s pretty agnostic as to where in the system it actually sits

Check this from the Wjggle description of the Ew-rs910. You need an additional adaptor (SM-EWWU111) to actually communicate using Bluetooth.
https://www.wiggle.com/p/shimano-di2-bluetooth-junction-box-ew-rs910?

@olibob thanks both.
The EW-WU111 unit seems the one to add into the loop as I like the idea of using the hood buttons to scroll screens etc.

Everything in e-tube is agnostic for position; it's all in parallel (except the dumb shift buttons which use the special port in the shifters, of course). Even the charge port is just a different jack into the e-tube harness.

Yeah, an EW-WU111. It's an inline doodad and talked Di2 to Garmin.

I bought one for diagnostics a few months back. Maybe @Titch or someone wants it? Can't see myself using it again any time soon.

Great, I'll message you now - thanks!

Putting a di2 bike (R8170) into storage for ~7 months. Do I need to disconnect the battery (which means a lot of fishing in the seat tube) or will disconnecting the rear mech do the trick? Any tips on not killing the battery appreciated...

7 months? Charge it up and store it. It'll be fine. Just make sure you don't lean the handlebars against anything that'll press the shifter buttons down.

I don't do anything to mine. I just leave the bastards gathering dust. Can't tell you if it's harmful or not but I've not yet replaced a battery.