A new level of performance for Shimano 12-speed road rear derailleurs. Wide 36T-compatible 12-speed Di2 rear derailleur. Receiving the wireless shifting signal from the shift lever, the Shimano Di2 105 rear derailleur completes a shift in the blink of an eye with its high-performance motor and optimized link structure.
A low-profile design reduces damage from contact and falls
Compact design includes an integrated wireless unit, charger, switch
