Di2 programming - shift patterns

Giraffoto

I don't have any Di2 gear, nor am I likely to in the near future. So this is all for my own curiosity. . .

To shift all the way from lowest to highest gears, I'll change six or seven times from one rear cog to the next, then a combined left-and-two right shift, then five or four more shifts to the top. It's the same deal on the way down from highest to lowest. The question is, can Di2 be programmed to shift like that? Can you program it so that it always has a "map" of where the next shift up or down will go, and you just press the Up or Down button? Just to be clear, you'd be able to simply push the right Up button twelve times to get from lowest to highest. Does it do that?

DHA987S

On Ultegra (6770 and 6870) and the current Dura Ace (9070) you can program shift speeds [very slow, slow, normal, fast, very fast] and also number of gears shifted [1,2,3 or multiple whilst button is pressed]. In very fast with multiple shifts it will go from top to bottom or vice-versa in under 1 second so they claim. Not tried it yet in that mode.

The multi shift [2,3 or multiple] only works once the button is held rather than pressed once if that makes sense. However I am finding that with 2 shifts and very fast speed it is slightly too quick and you get a double change when you sometimes only want a single. Am going to adjust the settings.

Giraffoto

But is there any way it can be programmed so that the eighth press of the Up button (just one press of one button) will simultaneously shift onto the big ring and down two cogs?

DHA987S

Not with the standard software no. Maybe if you hack it, but I don't know

shadow4532

its on a MTB but is this what you mean?
http://www.cyclingnews.com/features/fai ... d-hardtail

hatch87

It makes total sense for it to do that, silly that you potentially have to hack the device to do that, if even that would get the same outcome

markhewitt1978

I guess since the front shift is more significant a rider will want to be in control of that rather than it just happening at some point.

Giraffoto

shadow4532 wrote:

its on a MTB but is this what you mean?
http://www.cyclingnews.com/features/fai ... d-hardtail

That's exactly it! And although I can understand wanting to be in control of the front shifts, I thought the good thing with these systems was that they shifted fast enough that a double or triple shift was almost the same as a single shift. It's hard to see why it's not programmeable this way straight out of the box.

shadow4532

the next logical step would be a kind of automatic gearbox kind of systen linked to a power meter/ cadence sensor so you wouldnt even have to think about changing gear.

Bar Shaker

The next gear up from small chain ring, cog 10, is not large chain ring cog 1. If you map your gears out, there is quite a lot of overlap between them and the next ratio may be large chain ring, cog 6. Besides, you really shouldn't use the small ring and cog 10.

There has been a rumour floating around of an iPhone app that uses an ANT+ adaptor to talk to the Di2. It changes to keep your cadence in a user defined range and it uses GPS mapping to look at bike speed and work out if you are going to be climbing or descending and so wants you in your large or small chain rings. It sounds clever and plausible but no one has seen it yet and others have said Shimano aren't releasing the ANT+ codes of the Di2 controller as they want to sell you their own bike computer.

I am sure this sort of tech is only a short while away.

6wheels

shadow4532 wrote:

the next logical step would be a kind of automatic gearbox kind of systen linked to a power meter/ cadence sensor so you wouldn't even have to think about changing gear.

Looking at this thread with the intention of asking the same question.

Auto change just on the one chainring, that would be good...just call me lazy bones!