Ergonomic, powerful and compact Servo-Wave XTR hydraulic disc brake lever is performance optimized with full adjustability on the fly short stroke Servo-Wave mechanism with SIL-TEC coated roller for a quick, smooth pad engagement and more power for aggressive riding Excellent clearance at the calliper has enabled Shimano to use a short stroke Servo-Wave mechanism. As the brake lever is pulled a cam linkage enables rapid pad to rotor engagement, at the point of contact the cam moves across multiplying the leverage ratio and increasing the stopping power Second braced bar contact point for increased master cylinder and lever rigidity Easy access no tools lever reach adjustment for custom lever feel and position Lightweight, strong and durable magnesium master cylinder is rigid under hard braking loads Carbon lever blade with textured finish for optimum strength, grip and lightweight Ergonomic pivot position for efficient and powerful braking follows a natural pulling arc Integrated inline barrel master reservoir with easy bleed port Only for use with Low Viscosity Oil. For consistent viscosity over a wide temperature range ensuring stable piston movement within the brake system and always provides the necessary braking force with a constant lever stroke Hinged clamp for quick installation I-spec-EV compatible