Midway through last year, 5DEV introduced us to their new titanium cranks. The sleek crankarms are made with laser-welded ...
Power for the shifters is via two (2) CR1632 batteries (Shimano claims 3-1/2 to 4 year battery life). Batteries for the the shifters Although the 105 Di2 control levers are a lot like Dura Ace and ...