We could easily recommend PRO's XTR Di2-Compatible Tharsis Carbon XC Handlebar for its stiff responsiveness, vibration damping, and low claimed weight of 160g, which is on par with most other manufacturer's offerings. However, the bar's real selling point is the simple, clean installation of sister company Shimano's flagship off-road groupset. For tidy installation of Di2 trigger shifters, feed the wires into the bar through its center and then out of the aptly named cable exit holes. The wire housing then doubles back through a depression in the bar to route under grips and lever clamps in order to plug into your shifters.