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Old 03-12-13, 09:48 PM
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Ritterview
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Join Date: Sep 2005
Location: Northern California
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Bikes: BMC Pro Machine SLC01, Specialized Globe, Burley Rock 'N Roll tandem, Calfee Dragonfly tandem.

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Originally Posted by waynesulak View Post
Give us an electronic triple then we can compare manual to electronic. The thought of an electronic triple that does everything as advertised would be great. No long cable run issues, great front shifting, what's not to like?
The thing is, we will all grow old before Shimano or Campagnolo makes a triple shifting FD. If you talk to anyone in the bicycle industry about tandems and triples, they recoil from you as does Dracula from a cross.

I think it is doable, however, to modify existing systems to shift a triple. One thing to note is that the 11-speed chains are narrower, and thus the chainrings can be more closely spaced. This requires less range of throw of the FD. There might, even now, be sufficient throw now on Di2 or EPS to shift an 11-speed FD on a more closely spaced triple.

How it could be done for Campagnolo (and presumably Di2 as well) is depicted on this graphic. (1)The new Athena 3X FD donates its cage. (2) If the throw on the EPS FD isn't sufficiently wide, then a longer arm (as depicted) is fabricated using 3-D printing (see video below) to obtain wider throw. (3) The EPS brains are hacked to get it to make 3x shifts. All of these things have been done individually. K-Edge has done more than this to produce a mountain Di2 group.



3-D Printing bicycle parts:
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