This improves braking performance and reliability

»Compatible with satellite shifters

This rear derailleur

the GP 5000S TR is built to make you a better rider

shimano di2 battery internal mount Bike This improves braking performance andEW EC300 The new EC300 charging connector is designed specifically for Shimano's 12 speed Di2 road drivetrains. Connected via the rear derailleur, it is also compatible with Shimano power meters. Charging of the new Shimano 12 speed Di2 road drivetrains is now accomplished with the EC300 charger cord. Attached to the rear derailleur, this new cord is less expensive than previous chargers and can also be used to charge Shimano power meters. FEATURES