Review by Brandon Turman // Photos by Courtney Steen and Brandon Turman Maybe it was our hangover from the launch party the night before, but we were overwhelmed the first time we laid eyes on our Santa Cruz Bronson test bike equipped with Shimano's electronic XTR Di2 drivetrain. "What the hell are all these tiny little wires all over the bike? Why are the shift levers backwards? And for god's sake, STOP BEEPING." Yeah, it probably was the hangover. Like many, we couldn't stand the thought of electronics on a bike. Part of why we go mountain biking is to get away from all of that. Yet here we...