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For all of us lazy bike riders, I give you…

The Shimano Dura-Ace 7970 Di2 derailleur!  Shifting with a push of a button.  No more wrist wrenching required.  True laziness!!  Ahhhh.  An upgrade I don’t mind letting the moths out of my wallet for.

Shimano Dura-Ace 7970 Di2

Shimano Dura-Ace 7970 Di2

For those of you who are obsessed with road biking, this is probably old news to you.  But for me, this is the first I have heard of this wonderful invention.  Oh sure I have seen concepts in magazines throughout the years but I’ve never seen a real application that is being sold commercially until now.  And since I am inherently lazy, this thing hits the spot where I itch (so the saying goes).

From the Shimano website

Shimano officially announced Dura-Ace Di2, a technologically advanced, electronic shifting option for the all new 7900 series Dura-Ace. Comprised of Dual Control type shift / brake levers, front derailleur, rear derailleur, and a battery pack, the new Dura-Ace Di2 7970 components provide precision electronic performance and integrate seamlessly with components from the 7900 series Dura-Ace group while adding only 68 grams to the entire group.

Electrically actuated shifting significantly eliminates issues associated with cable friction and contamination because the derailleurs respond to electrical impulses that are delivered in fractions of a second. The shifters are now merely switches which also allows for creative placement of optional remote shifters while also reducing the weight and profile of the main shift units. Derailleur movement is precisely controlled through computer automated movement and servo motors creating perfectly synchronized and calibrated shifts every time.

I saw it today on the Engadget website.  Check it out.



2003 Specialized Enduro Expert
2005 Specialized Roubaix Elite Double


2 comments to For all of us lazy bike riders, I give you…

  • curtissweb

    Nice. It would be pretty cool to own these. It might actually be better for mountain biking since weight is not really a key issue and I am shifting much more on my Enduro than on my road bike.

    Check out the discussion on the last posting…tonight I was out chainsawing some more.

  • Now that would be awesome. I rode 25 miles tonight and I must admit I skipped gears at a couple of inopportune times.

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