A new level of performance for SHIMANO 12-speed road rear derailleurs

If 28 isn't helping you climb then this wide 36T-compatible 12-speed Di2 rear derailleur should. Receiving the wireless shifting signal from the shift lever, the SHIMANO 105 rear derailleur completes a shift in the blink of an eye with its high-performance motor and optimized link structure. This is the hub of the Di2 system, with the charging port, indicator LEDs, adjustment switches and more integrated into a compact package. A low-profile design reduces damage from contact and falls.

FEATURES

• Compact design includes an integrated wireless unit, charger, switch
• LED status indicator
  Battery indicator
  Pairing
  Adjust mode, etc.
• Wider range capacity
  Max Low(big) Sprocket 36T
• Cage Length : one-spec
• Total Capacity 41T
• Mount: Direct Attachment (conventional)/Direct Mount Compatible
• Number of Pulley Teeth 11
• Rear Speeds: 12