Erik Annis posted a discussion

The Trek Boone and Shimano Dura-Ace Di2 electronic drivetrain doesn't seem to be a good combo: See Sven Nys' mechanical issue at 11:50 time on the live Milton Keynes video:https://www.youtube.com/watch?v=t2CD5_oCZ2M(you need Hola set to Great Britain).http://www.cxmagazine.com/sven-nys-trek-boone-9-cyclocross-bike-profile-crossvegasPS, same issues with Katie Compton's same bike spec: http://cowbell.cxmagazine.com/forum/topics/katie-compton-dropped-chain-2-days-in-a-row-at-cincy3?xg_source=activityI think that both Sven and Katy need to hobble together a Shimano hacked 1x11 with an XTR Di2 rear derailleur and a "re-branded" narrow-wide front single chainring.See More