Shimano RD-R7150 12 Speed Di2 Rear Derailleur arm protector with a big slide opening

with a big slide opening at the top for quick filling of ice and water

race-proven compound and casing construction – this is the tire for XC courses that mix hardpack with root lattices and the occasional rocky stretch

sealed-bearing cassette

Increased visibility - refelective print on elbow joint

Shimano RD-R7150 12 Speed Di2 Rear Derailleur arm protector with a big slide openingThis 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. Wide 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.