Shimano 105 Di2 R7150 Rear Derailleur

You can get this Backpack reduced from £93.25 to £59.99.

The all-new Shimano 105 R7150 rear derailleur represents a new level of performance for 12-speed road drivetrains. 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, while its wide 36t compatibility opens up a whole new range of gearing options to day's road riders.