Shimano 105 RD-R7150 Di2 12 Speed Rear Derailleur bikecorp and the Service Course 70-Ergo

and the Service Course 70-Ergo has been updated with the newest features that riders need

By combining trickle down technology with a greater accessibility

seamless shifts even under heavy pedalling loads

Upper cup: 44mm InSet

Shimano 105 RD-R7150 Di2 12 Speed Rear Derailleur bikecorp and the Service Course 70-ErgoWide 36T compatible 12 speed Di2 rear derailleur. 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.