Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

I'm on grx shifters that dont have the third port, can I still use a climbing (sw-r600) shifter via a Y cable or junction box?

Yes, it can go anywhere on the system. You can also plug it into the second port on the GRX levers if you have one free.

Good to know thanks, currently have all used.

1 goes to Bluetooth & charge port, the other goes to the other shifter, and then off to the 4 port junction box down by the BB for battery, fd & rd.

So Y cable one of the shifter cables. Plan is to place the climbing buttons on my aero bars.

Cheers @andyp and @jp
I’ll pass it on. A friend has hurt their back and is thinking of flat barring their Tarmac for a while. I said I’d sort out the brakes, but Di2 is way over my pay grade.

Very cheap 3 port junction boxes here: https://www.ribblecycles.co.uk/shimano-ew90-di2-junction-a-3-port/

£14.99

Holy fuck!

Went to buy a couple, but the shipping went from $5 to $40 :(

You're doing it wrong. 🙃

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Thanks. Not sure I'll use it but given I've removed the aerobars off the Tripster, I could swap this in, which would give me a 'free' 5-port to use on another bike.

Yeah, I wonder how long it'd take for me to sell ten of em

Anybody still using DA 7970? I’ve ended up with an EW-7970 wiring set and should probably test it before moving it on (have no use for it).

Someone somewhere is gonna want that

Just got an Aethos built in the workshop delivered, with Ultegra di2. What step do I need to take to get the shifting to work?

Has it already been set up? I'm confused by the question - if it's been built up, surely the mechanic has set up the di2 already?

If so, make sure the battery is charged and you are good to go.

Thanks - was a loose cable connection. Sorted now.

£9.99 now. Just bought 5. Lolz.

I've probably asked this but I'm looking again - will the GRX ST-RX820 12s levers work with 11s deraillers?

If they do, would you pay the extra to future proof them?

Mechanical and Hydraulic Shifting >>>>>>>>

Ahh, sonofabitch! That's why that weren't already in my list. I remember now. There's no GRX 12s yet, right? I knew I'd asked this before.

Got confused because the new series calipers apparently can be used with the older series levers (Di2 GRX).

So I want GRX Di2 ST-RX815 + GRX BR-RX820

#toomanyfuckingbikes

There's no GRX 12s yet, right? I knew I'd asked this before.

There is, but it's mechanical. There's no 12 speed di2 GRX yet.

Plus the 12 speed di2 components use a different wiring, so you need an adaptor, which Shimano provide, but I don't think everything works out the box, because some 11 speed components haven't had updated firmware to work with 12 speed yet.

Mechanical is dead to me.

I can update firmware but I think the bigger blocker is... the GRX Di2 12s shifters don't exist :D

Where's the best place to get the 11s battery these days ?

BT-DN110-A if I'm not (again) mistaken.

Okay, me too now.

But when I first hit the link, I saw 9.99 change to $30, and I was like WTFawww...

Lucky I tried adding to cart, where it showed up as $20. Weird

Yeah showed 9.99 > 14.99 > 9.99 for me. Weird.