The Shimano XTR M9000 Rapid Fire Shifters is where Shimano has set the benchmark with the next generation of mountain bike shifting, M9000 XTR Rapidfires with Vivid indexing are their slickest shifters yet. They are light to the touch but positive and crisp. Vivid indexing provides a constant amount of shift lever force across all sprockets. The Instant Release for super fast shifts, delivers the chain to the next gear the moment the lever is actuated with no hesitation. The 2-Way release allows the upper shift lever to be activated by either your thumb or index finger to change gear. This Shifter also features a precision indexing drum with four sets of ball bearings providing low-friction smooth shifting. This shifter is available in left or right side in both I-spec II mount or bar mount pod design, the forged alloy I-spec II mount allows the shifter to be mounted in or outboard of the brake lever and is horizontally adjustable and the bar mount pod design can be converted to I-spec to integrate with the XTR brake levers.