12-speed Di2 rear derailleur with a wide range of up to 36T. After receiving a wireless signal from the shifter, the SHIMANO 105 rear derailleur changes gears in the blink of an eye thanks to its efficient motor and optimized communication. It's the hub of the Di2 system, with a charging port, LED indicators, adjustment switches, and other integrated features. The low-profile design reduces the possibility of damage from contact or falls.

・Compact design includes integrated wireless module, charger and switch
・LED status indicator
»Battery indicator
"Evaporation
»Regulation mode etc.
・Greater range
»Max. largest sprocket: 36T