Shimano Ultegra ST-R8170 12-Speed Di2 Hydraulic STI Lever Only Capacity_43 L Multi-frequency: High-precision route recording through

Multi-frequency: High-precision route recording through multi-frequency reception of global satellite systems (GPS

The Black Shield treatment enhances durability

Bottom Bracket Type: Threaded

Interchangeable lens construction: different lens colors guarantee clear vision

Outer width: 23

Shimano Ultegra ST-R8170 12-Speed Di2 Hydraulic STI Lever Only Capacity_43 L Multi-frequency: High-precision route recording throughShimano Ultegra ST R8170 12 Speed Di2 Hydraulic STI Lever Only p> Wireless shifting and the best hydraulic disc braking anywhere, plus revolutionary eTap shift logic. What more could you want? While we could have stopped there, we went further and optimized the hood shape to fit hands of all sizes, for comfortable and controlled braking from any position. High performance Ultegra Wireless hydraulic Servo Wave disc brake Di2 STI's give you control,