Dura-Ace Shimano 9000 Dual Control Lever ST-9000 Silver Left Shift Lever SIS indexed shifting 11-speed design Smaller hoods improve ergonomics from all positions Release lever stroke reduced by 30% compared to ST-7900 Polymer-coated cables for the smoothest shifting Shifting effort up to 47% lower than RD-7900 43% less effort at the end of the lever stroke than FD-7900