New Dura Ace Di2 Tech
Written by: Greg Kopecky
Added: Sat Apr 20 2013
Before we begin, I’d like to offer a quick explanation of the Shimano numbering system. All of their products receive a number – which you often see – but can be easy to forget.
6700 – Mechanical 10-speed Ultegra
6770 – Electronic 10-speed Ultegra Di2
7900 – Mechanical 10-speed Dura Ace
7970 – Electronic 10-speed Dura Ace Di2
9000 – Mechanical 11-speed Dura Ace
9070 – Electronic 11-speed Dura Ace Di2
The most important thing with new Di2 is the customization that is available. Now your mechanic will need not only wrenches to fix your bike – but also a computer.
Multi-shift is a function that is new for 9070. Simply put, when you hold down a shift button, it will continue to shift the rear derailleur (rather than pushing the button five times for five shifts). The speed and number of shifts is completely programmable, which is what we will show you.
To start, you click on ‘Connection Check’:
E-Tube is the platform that you use to make all changes. You can decide which shift button does what. If you want your right hand to activate the front derailleur and your left to activate the rear, you can do so. If you want to reverse which button shifts up and down, that’s fine too. To get a better picture of your options, Shimano provided this graphic:
Each shifter takes up a slot in the junction box. If you want to run drop bar shifters PLUS bar-end shifters (i.e. on an ITU bike), that takes up four of the slots, leaving one for the charging/diagnostic devices to plug in to. Each drop bar shifter has three ports of their own, to accommodate both the sprint shifter and climbing shifter options. If you want to run ALL of the shifters on one bike, you can do so.
Shimano tells us that they are getting a lot of questions regarding cross-compatibility of systems (we certainly had some questions of our own). They provided this information to answer some of the more common concerns:
Here are a few more:
Weight and Price
While I don’t normally talk a lot about weight and price very much, I think they are a notable part of this discussion. Shimano provided the following spreadsheet that details the weight reduction of new 9070 Dura Ace Di2:
Where has price gone?
I’m not one to beat the price point to death. We all form our own opinions on what qualifies as expensive or not. What I will say is that – I think – Shimano is delivering a lot of value. The price is high, but the stuff works really, really well. If it did not work well, I would have much more issue with the price. It will be out of reach for some (perhaps many). That being the case, I think the upgraded 6770 (with 5 port junction and auxiliary brake lever shifters) is a fantastic option that offers 90% of the function, at 60% of the price. Of course, there are still many more lower-priced mechanical options, such as 105 and Tiagra.
What do you think? Is new Di2 what you hoped for and expected? Is it the best-thing-ever? Is it too complicated, and we should all go back to 7-speed downtube shifters?
All images courtesy of Shimano
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We take a quick look at new Shimano 9070 Dura Ace Di2. The groupset is now 11-speed and gains a host of new features. Our gallery recaps the official product presentation in San Diego, CA. 3.19.13
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