Shimano dura ace di2 r9170 road disc brakethe dura ace r9170 road disc brake combines the di2 9170 shifters with the hydraulic 9170 brake calipers for a combination of smooth and speedy shifting with powerful and efficient braking this kit comes pre bled and ready to use with shifter hose caliper and pads the 9170 shifters feature an ideal ergonomic shape that is comfortable in the hand and similar in size to mechanical braking versions of the shifter the shift paddles now also feature a mo