This cutting-edge electronic shifting system includes the ultra-responsive SW-M9250 I-Spec EV shifter, BT-DN320 battery, EC-DN100 charging kit, SM-CN910 quick link, and the lightning-fast SGS rear mech. Designed for serious riders chasing every marginal gain, it delivers seamless, instant shifts with legendary XTR precision. Whether you're racing XC or carving out epic singletrack, this upgrade gives you the tech edge you need.SW-M9250 I-Spec EV Di2 ShifterThe heart of Shimano's wireless Di2 shifting system.This sleek and compact right-hand shifter integrates perfectly with I-Spec EV-compatible brake levers for a clean cockpit. With lightning-fast, customizable electronic shifting, it's designed for intuitive control whether you're racing or just pushing the pace on your local trails.BT-DN320 Internal Di2 BatteryThe latest-generation battery for Shimano's 12-speed Di2 groupsets.Mounts inside the seatpost or frame for a tidy setup and powers the entire Di2 system. With increased capacit