Engineered for time trial and triathlon performance, the Shimano ST-R9180 Di2 STI Left Shift-Brake Lever offers precise electronic shifting and powerful hydraulic braking in an aerodynamic, compact design. Specifically built for 2x drivetrains, this lever integrates seamlessly with Shimano’s Di2 electronic groupsets, providing effortless control at high speed. Its ergonomic shape and optimised button placement ensure comfort and confidence in aero positions, while the hydraulic system delivers consistent stopping power under pressure. Perfect for competitive riders who demand speed, precision, and reliability.