Shimano Ultegra Di2 R8170 rear brake

Shimano Ultegra Di2 R8170 rear disc brake kit.
Shimano manufacturer reference: IR8170DRRDSC170D

Clean cabin: wireless connection improves the aerodynamic effect and facilitates maintenance.
Unmatched ergonomics, perfected with professional feedback.
Raised handguard improves ergonomics.
Optimized braking control.
Lighter and smoother lever action.
Optimized modulation thanks to a larger braking control area.
Compatible with wired and wireless connection.
Available for additional satellite shift controls.
High electronic energy efficiency.
1.5 to 2 years of battery life with easy to replace CR1632 batteries.
Increased pad clearance by 10% reduces brake noise.
Low maintenance purging procedure.
EAN: 4550170900366