Originally Posted by
Noctilux.95
I just installed 9150 Di2 on both my bikes and have no clue, nor have I even looked for, how synchronized shifting works. Maybe I should check youtube
One bike has the conventional, underneath the stem junction box, while the other, inside the bar end.
Yes, I definitely recommend checking it out. Both S1 and S2 have their merits. Paired with a Garmin 1000, some useful stuff like knowing when it is going to shift.
I don't have 10 posts yet so I can't post the link but google Shimano E-Tube compatibility chart and you'll find what you need to get automatic shifting work. You may need a new battery, DN100 or DN101 and WU111.