As a touch point, your shifters are an important connection between rider & machine. With shift effort decreased by 20%, dual-textured carbon levers, enhanced vivid index mechanism, & a more ergonomic release lever, M9000 offers the most responsive mechanical shifting in the industry. Key Features 20% Lower Shift Effort Longer Carbon, Textured Levers enhanced Vivid Index Mechanism Polymer-Coated Inner Cable I-Spec II Offers More Room on bar & Rotation & Side Adjustability Multi, Instant & 2-Way Release Ball Bearing Lever Construction for Light Shifting Operation