Shimano R8170 Ultegra Di2 Shifter and Brake - Left Dropper Lever which adds positioning flexibility and

which adds positioning flexibility and makes it easier to fit on smaller frames

and compatible R9200/R9250 groupset components

and Presta valves are common on higher-spec fat builds where precision pressure adjustment matters

For any rider setting up a proper home wash station

The moderate position design suits riders whose back sits at roughly 60 degrees

Shimano R8170 Ultegra Di2 Shifter and Brake - Left Dropper Lever which adds positioning flexibility andWhat Does the Shimano Ultegra R8170 Di2 Left Lever Control? The Shimano ST R8170 left lever is the front brake and front derailleur shift control for the 12 speed Ultegra Di2 hydraulic disc brake system, combining wireless electronic shifting with SERVO WAVE hydraulic braking in a single ergonomically refined lever body. Wireless Di2 connectivity eliminates the shift cable entirely between lever and front derailleur, sending commands via Bluetooth LE