Dura Ace Di2 ST-R9180 STI Electronic Dura Ace Di2 Dual Control Levers 2x11-speed - especially for time trial and triathlon bars. The switching operation can be initiated with the hands on the brake lever. The ST-9180 provides switching from several positions and during braking. The lever is made of carbon fiber reinforced polymer (CFRP) and offers reach adjustment. A single button on each side of the shift lever is designed to work with Synchro Shift. Each switch is available with multi-shift on/off. I ntegrated E-TUBE cable and internal brake cable routing ensure for enhanced cockpit aesthetic and aerodynamics. Included in delivery: right TT / Triathlon Dual Control Lever Material: aluminum, carbon fiber reinforced polymer (CFRP) Weight supplement: manufacturer's information