Shimano Dura-Ace Di2 Triathlon:
The Ultimate Weapon
The revolutionary Dura-Ace Di2 electronic shifting option for triathletes and time trialists eliminate the need to change hand positions for shifting. The electronic system is linked and you can execute gear shifts from the base bar or aero extensions which will save time and energy so you can focus on pedaling to your hearts content. That means you can shift on your way through a turn and be ready to hammer when you come out of it! The increased accuracy, smoothness and reliability of electronic shifting makes gear changes faster and eliminates missed shifts.
Now the only question is; what to mount it on? Being a Specialized dealer and all, Spark Bike Run Sports in East Taunton, MA recommends the Specialized Shiv!