Originally Posted by kbarch

Di2. You can always go back to mechanical if you don't like it, but if you get disc, your bike will ALWAYS look dorky.

Originally Posted by Steve B.

A Di2 ready frame is going to have internal routing for mechanical.

Things to look for,

1) Are the entry and exit points for cable sized for the E-Tube connectors. The housing stops for mechanical need to be adaptable and/or different to allow the E-Tube cable to pass into/out of the frame. This is for the front access point on the downtube (if that’s the access point) as well as the exit for cable on the chain stay for the rear derailer.

2) The front derailer mechanical cable will feed from the bottom of the b-bracket area while the E-Tube hole might be up near the derailer mount.

3) Some bikes might come with h-bars designed for Di2 cabling. Not a big deal if it doesn’t, but if not, you use the A Junction box that sits under the stem, vs. the newer model that replaces the plug on the bar end and has cabling interior on the bar. You can always aftermarket purchase a Di2 bar.