I guess that I'm more old-school than others when it comes to electronics. We almost always ride in familiar territory so an map function is unnecessary. Stuff like power output etc. will only confirm that I am getting older & slower.

We have really only ridden around the block with the new bike & Di2. I hope that I don't regret this decision. One think that I like about bikes is that they are one of the last truly mechanical toys available. Now I have allowed electronics to creep into this and it is not just a gadget - it is integral to the functioning of the bike.

I just rode my older single bike yesterday. It is 2 x 10 Durace. I can run small front ring with all but the smallest rear cog with no noise. Now it appears that on the tandem I can't use any of the 3 smallest rear cogs with the small front ring. Is this because of Di2 or something else? If this is a compromise of Di2 why is this not made clear by Shimano and all of the early adopters?