Di2 Cheat Sheets are here!

[Agent041]

I know you casn program the buttons on shifters on 12speed Di2 as you preffer, but II cannot find where you can copy Sram setup.
- pressing left and right at the same time to shift front derailleur (both left buttons and both right buttons as option if possible)
and have at the same time the setup to
- left button to shift up in the rear derailleur and right button to shift down in the rear derailleur

I also ride in winter and frozen fringers and Shimano Di2 shifting is almost impossible. It is much better with 12speed as was with 11speed, as you can feel one button is more outwards, but when deeply frozen fingers, is still very hard to make the right shift.

Is it even possible? And if yes, how?

[BernieMoves]

I'd set the big buttons to RD up/down and the small buttons to "front shift next" on Shimano, which makes the FD change position to the one it's currently not in. SRAM copy with the advantage of not having to actuate two buttons simultaneously to initiate a FD shift.

[Agent041]

I'd set the big buttons to RD up/down and the small buttons to "front shift next" on Shimano, which makes the FD change position to the one it's currently not in. SRAM copy with the advantage of not having to actuate two buttons simultaneously to initiate a FD shift.

the point is that it would not matter which button would I press due to frozen fingers (naturally only left or right side would matter). In that setup, I would have to be very carefull to see if I press small button or big button. In that case it can stay as it is.

[BernieMoves]

I'd set the big buttons to RD up/down and the small buttons to "front shift next" on Shimano, which makes the FD change position to the one it's currently not in. SRAM copy with the advantage of not having to actuate two buttons simultaneously to initiate a FD shift.

the point is that it would not matter which button would I press due to frozen fingers (naturally only left or right side would matter). In that setup, I would have to be very carefull to see if I press small button or big button. In that case it can stay as it is.

I see. In that case I would set both buttons per side to shift in the same direction, use full synchro shift and put front shift next on the hood buttons. This results in automatic mode with manual override option (which is how I ride most of the time, albeit with a different button configuration).

[Agent041]

I'd set the big buttons to RD up/down and the small buttons to "front shift next" on Shimano, which makes the FD change position to the one it's currently not in. SRAM copy with the advantage of not having to actuate two buttons simultaneously to initiate a FD shift.

the point is that it would not matter which button would I press due to frozen fingers (naturally only left or right side would matter). In that setup, I would have to be very carefull to see if I press small button or big button. In that case it can stay as it is.

I see. In that case I would set both buttons per side to shift in the same direction, use full synchro shift and put front shift next on the hood buttons. This results in automatic mode with manual override option (which is how I ride most of the time, albeit with a different button configuration).

That would work, but I do not like syncro shift. It does not suit my riding style. And upper buttons on the hoods are also not exactly easy to press. Especially with frozen fingers.

[satanas]

If your fingers are always frozen the answer is better gloves (or warmer clothing generally). Or else give up and switch to SRAM....

[BernieMoves]

Buy SRAM then

[Agent041]

If your fingers are always frozen the answer is better gloves (or warmer clothing generally). Or else give up and switch to SRAM....

The gloves are suitable for given temperature. Thicker (warmer) gloves means more sweat in the first hours, and therefore more quickly frozen fingers aterwards. I sweat like a pig even in winter. And use top range gloves (for every possible temperature level) and other clothing.

In winter I usually start in daytime, and end in night, when temperatures drop rapidly. Down on around -5 degrees it becomnes tricky. Normally it is a 4-5h ride. I have experimented with a lot of things over the years, and now somehow satisfied with having 2 base layes gloves in my pocket when I beginn (one very thin and one a bit thicker). But after hours deep below zero, you definatelly get frozen fingers.

[Ritxis]

Shimano has already published firmwares that improve security in the wireless connection of rear derailleur/shifters

for road and GRX 12s groups

[TerryDi2C]

...except someone forgot to upload the file for the Ultegra / DA rear derailleurs.. or forgot to rename it.. or messed up in another way. It's not great

[Ritxis]

...except someone forgot to upload the file for the Ultegra / DA rear derailleurs.. or forgot to rename it.. or messed up in another way. It's not great

The app tells me that there is an update... that's if it doesn't let you update just the derailleur... a thing about not having the levers connected by cable

[frostorama]

Looks like Shimano have fixed the firmware installation now; I have been able to update both the shifters and rear mech via the E-Tube app (via hard wired connection for the shifters).

[TerryDi2C]

Yeah, they uploaded the coect files monday

[Philbar72]

hi all, haven't tried it but i ran 53/36 on DI2 11 speed ultegra without an issue. can someone verify that using ultegra 12 speed (and 105) that the upper limit is 52 teeth.

also when Time trialling i ran 55/39 using a dura ace front mech. Would the current D12 (12 speed) dura ace be able to cope with this?

[K4m1k4z3]

I have noticed a strange behaviour with my left shifter (FD) and the sleep function of the Di2 system after a certain amount of inactivity (I think it's 30 minutes). Ultegra R8100.
I'm not sure if it's the latest update and I'll have to investigate further but here are some of the details:

My buttons are set up as follows:
Left Top: RD Downshift
Left Big: Front Shift Next
Left Small: D-Fly Ch. 1 (Lap)

Right Top: RD Upshift
Right Big: RD Downshift
Right Small: RD Upshift

The issue:
Let's say the bike has been stationary for a while. I wake up the RD by pressing the Right Big paddle once for a Downshift. The RD 'wakes up' with a twitch but doesn't complete the shift. To complete the shift I have to press the button again. This is fine by me as it has been always been this way IIRC.

But right after that if I press the Left Big paddle to shift the FD - nothing happens. But why doesn't anything happen if the RD which is receiving these signals is already awake? This makes no sense to me. I have to press the button yet again to initiate the front shift. It's almost as if the left shifter goes to sleep. Or the FD goes to sleep. But then why doesn't this happen with the right shifter? And why does the RD react to the very first button press of the right shifter by twitching?

EDIT:
If I 'wake up' the Di2 by pressing the Left Top button for a Downshift this makes the RD twitch as well. Then if I press the Left Big paddle for a Front Shift Next it will perform the shift on the FD and trim the RD accordingly. But again, the first press of a button on the right shifter to shift the RD will not initiate any action.

It really seems BOTH shifters are going to sleep and need to be woken up separately.