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The low profile design avoids damage from rocks whiles SHIMANO's chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gear positions
Dura Ace R9170
Stable and versatile brake performance in the most demanding conditions
It is not recommended to pair the X-RoadCam 50 x 110 DA9100 (4 arms) with a different size or with products of other brands for not compromise the shifting performance
Group: Road (Dura Ace
Shimano Junction A SM-EW90-A-5 Port Assos_Bibshort The low profile design avoidsSHIMANO Junction A E TUBE Under Stem Mount 5 Port SHIMANO's SM EW90 B 5 port Junction A mounts neatly to the bike stem and connects with E TUBE wires from DI2 shifters, accessory shifters, and the downtube junction wire. The SM EW90 junction box features an integrated battery level indicator, charging port, and gear index setup switch.