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Di2 with Q-Rings

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Uploaded on Jun 11, 2011

This Video depicts how the Shimano Di2 Front Derailleur works with Rotor Q-Rings 52/36. The setup comprises a Trek Madone (2010) and a beautiful Rotor 3D Crank set with 172.5mm length. Installing and adjustment was a bit tricky for me, because the builder of the bike had cut the cable for the front derailleur so shortly that I had to return the bike to him that he could correct his bad work. He also installed the crank set and adjusted the derailleur. Adversity is the school of wisdom. Lucky me checked the setup before starting the test-drive. Everything was configured so badly that I had to completely readjust it.
Getting it working was however quite easy at last. Thanks to the Di2 only 5 minutes of work. However, the number of possible sprockets is still limited. The front derailleur seems to be unable to see the small ring in all positions. That's why I cannot use the upper 5 rear sprockets so far. I have however got all sprockets working with the large ring. That's OK for the moment.

I'm quite impressed by the smooth running of the chain with Q-rings installed and how well the Di2 is able to switch between both rings. Quite impressing, because I had heard that Q-Rings wouldn't work with Di2. That's definitely not true as the vid shows. To be honest it even runs smoother than the old Dura Ace FC-7950 crank set did, which was getting on my nerves with constant noise. What I really love about the Rotor stuff is that you can combine ring-sizes however you like. (Thanks to the nice guys who gave me the hint!) I decided to mount a 52/36 set with my Compact 110mm crank set. If I want to change back to 50, I will only have to exchange the single ring, not the whole crank set.

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