With Di2, Shifting is electronic. With this, Di2’s shifters can be perfectly adjusted to every rider’s unique grip and shift direction preference. Di2 levers can be micro adjusted to any riders hand size. Perfect ergonomics mean you can shift on the fly easier without having to adjust your grip on the handlebar. Additionally, through E-tube (which you can read more on below) you can pre-program shift direction, speed and gear mapping. You decide as you have the ability to pre-program the shifter to do what you already do already. The decision and customization is completely up to you.