Takeaway: Shimano’s refresh ... It’s wired to the front derailleur via the battery and wirelessly communicates to the shift ...

At first, it was easy to dismiss Di2 for that limitation—but lo and behold, not only did I not mind relearning to use a front derailleur, I’ve actually come to appreciate it.

Want wireless shifting but don't want to have to buy a whole new drivetrain? The new NXS system is worth a look!