The Shimano Dura-Ace ST-R9180 is a left-hand Di2 hydraulic shift/brake lever for time-trial and triathlon base bars.

• Series: Dura-Ace Di2 (R9150)
• Left lever: front (2-speed) Di2 shifting plus hydraulic disc brake
• Mounts in bar ends with 19.0-22.5 mm inner diameter
• Wired Di2 (E-TUBE)
• Adjustable reach
• Approx. 99 g; recommended caliper BR-R9170