Question Regarding Electronic Shifting
 

Hi,

I'm looking to purchase a Specialized Sirrus Pro Carbon. This bike includes hydraulic disc brakes. To this I would like to add a Shimano di2 electronic shifting component. Given this bike uses both flat handlebars and has hydraulic disc brakes, what shifters can I use in this setup? It seems that most of the shifters are integrated into braking levers that are designed to go on drop bars. Could I get dura ace di2 derailleurs and mix these with one of the XTR di2 shifters (i.e. programmable Firebolt or Alfine di2 shifting switch)? Ideally the weight savings of the dura ace line is important to me, but I'm not sure whether shifters from other di2 groupsets can be paired with these given that the dura ace shifters don't seem to be compatible with this bike. Any ideas?


Thanks!

My understanding is that the sw600 shifters can be plugged directly into junction boxes TriRig.com - Shimano's Secret Black Box without using STI levers and reprogrammed for the front shifting.