Comments on: Shimano 2013, Part 2, 9070 Di2 Dura-Ace

By: David

David — Tue, 25 Dec 2012 05:40:31 +0000

Any idea when this will the commercially available?

By: MaLóL

MaLóL — Fri, 21 Sep 2012 18:32:05 +0000

Put a GPS on that flightdeck, and introduce 105 Di2 a bit cheaper than ultegra Di2 and this would be my next groupset, no doubt. I love japanese engineering.

By: Colin Allanach

Colin Allanach — Sun, 09 Sep 2012 17:22:26 +0000

I have a number of 10 speed bikes Road bike, winter bike , TT bike. I regularly swap wheels about for racing, training etc. I would like to upgrade to Di2 but the 11 speed thing bugs me. Can I programme this from 11 speed to 10 speed? I would buy the original DI2 but I’m concerned they will phase it out and the new cabling seems a step in the right direction.

By: Bob V

Bob V — Wed, 29 Aug 2012 19:13:18 +0000

The programmable shifting will be, IMHO, a great addition. I currently ride DuraAce Di2 with a compact crank. This after riding 30 years on my downtube shifting half-step+granny touring bike. That is going from a 4 tooth front shift to a 16 tooth shift. Heading into a hill, ready to dump to the small ring (34t) is where I notice the biggest drawback with a compact crank. That 16t change has me spun out until I lose mommentum, and I had come to plan a downshift in front and two upshifts in the rear to keep some kind of continuous force on the pedals. Being able to program in 3 shifts in the rear will be welcomed. There will still be a double shift required (front & rear) but now I won’t have to be double tapping the lever for the extra shifts. What will be really great is if the speed of the multi-shift can be accomplished faster than two mouse clicks.

And I do love Di2. I put Ultegra Di2 on my wife’s bike and she likes riding more than she did before. She was on Ultegra mechanical triple front and never could dial-in the trimming of the deraileur. Now with Di2 its shift and forget it. She loves it, really, really loves it.

By: Hammertime

Hammertime — Mon, 25 Jun 2012 00:00:17 +0000

I learned to shift with downtube friction shifters, then went to DT index shifters, and now Record ergo 10 shifters. I have been very proficient in determining when to shift, how many gears to shift, and in executing the shifts. I do not have a bike with electronic shifting as of yet. That I happen to ask questions/make observations concerning how well the design of an electronics shifting system provides the flexibility that it could (under my proposed system, you can have as many or as few dump point as you want, so you wouldn’t lose anything vs. a system with only one dump point, as that could be one of your options) does not mean I don’t know how to ride or shift efficiently and effectively.

But thank you very much for your concern.

By: Steve

Steve — Sun, 24 Jun 2012 20:50:34 +0000

I need to take a dump reading all the myopic focusing on dumps. If you need that many different dump setups I suggest you learn how to actually ride a bike and shift efficiently. LOL

By: Hammertime

Hammertime — Wed, 20 Jun 2012 02:11:21 +0000

So it’s a choice of one or dump? Can you program how long a hold until dump is triggered? If so, can you specify down to tenth of a second? Does it do the first shift riight away and then wait to see iif it’s held long enough to signal a dump?

Itt would be better to allow you to specify a sreries of dumps with defined hoolding times, and do each incremental dump as tthe holding time crosses each limit. You could have the option of just a single dump iif you want.

By: Emiliano Jordan

Emiliano Jordan — Mon, 18 Jun 2012 15:36:28 +0000

Hammertime,

You’re right, we had a typo there I just corrected it, thanks. The programming is fairly basic, but we’re still excited about the prospect of programming shifters and hope that this will open up a lot of doors for the creatively driven. Right now it’s just programmable “dump.” Choose between two and 10 gears for the dump during set up and you’ll get that during your rides. I’m thinking 3-4 gears for myself.

By: Hammertime

Hammertime — Sun, 17 Jun 2012 18:45:35 +0000

Could you please elaborate on “The biggest change I see in the front shifter is for a programmable multi-shift function. This allows dumping your selected number of gears. Push the button quickly once and you get a single shift, pushing and holding the button results in shifting however many shifts you have programmed it to execute. You can choose anything from a double shift up to 10 shifts moving from one end of the cassette to the other.”

I presume you meant rear shifter. In any event, could you describe what level of control you have over programming how many gears it shifts in response to a particular hold time? Can you do something like input a list of times to the tenth of a second, not necessarily evenly spaced, for how many gears to shift depending on hold time? Is there any audible, tactical, shock or other feedback provided as to how many gears will be shifted?

Thanks.